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Horologium (constellation)

Index Horologium (constellation)

Horologium (Latin hōrologium, the pendulum clock, from Greek ὡρολόγιον) is a constellation of six stars faintly visible in the southern celestial hemisphere. [1]

Table of Contents

  1. 111 relations: A-type main-sequence star, Abell catalogue, Age of Enlightenment, Alpha Horologii, Ancient Greek, Antlia, Apparent magnitude, Arp-Madore 1, Astronomer, Astronomical Society of Southern Africa, Astronomical unit, Barred spiral galaxy, Bayer designation, Benjamin Apthorp Gould, Beta Horologii, Binary star, Caelum, Cambridge University Press, Cape of Good Hope, Carbon star, Chisel, Circinus, Constellation, Constellation family, Debris disk, Declination, Deep-sky object, Delta Horologii, Dolphin, Dorado, Double star, Dwarf galaxy, Effective temperature, Equatorial coordinate system, Eridanus (constellation), Exoplanet, Fornax, Francis Baily, Giant star, GJ 1061, Globular cluster, Habitable zone, HD 27631, Horologium in Chinese astronomy, Horologium-Reticulum Supercluster, Hyades (star cluster), Hydrus, IAU designated constellations, International Astronomical Union, Iota Horologii, ... Expand index (61 more) »

  2. Constellations listed by Lacaille
  3. Southern constellations

A-type main-sequence star

An A-type main-sequence star (A) or A dwarf star is a main-sequence (hydrogen burning) star of spectral type A and luminosity class (five).

See Horologium (constellation) and A-type main-sequence star

Abell catalogue

The Abell catalog of rich clusters of galaxies is an all-sky catalog of 4,073 rich galaxy clusters of nominal redshift z ≤ 0.2.

See Horologium (constellation) and Abell catalogue

Age of Enlightenment

The Age of Enlightenment (also the Age of Reason and the Enlightenment) was the intellectual and philosophical movement that occurred in Europe in the 17th and the 18th centuries.

See Horologium (constellation) and Age of Enlightenment

Alpha Horologii

Alpha Horologii (α Horologii) is a solitary orange-hued giant star and the brightest star in the constellation Horologium.

See Horologium (constellation) and Alpha Horologii

Ancient Greek

Ancient Greek (Ἑλληνῐκή) includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC.

See Horologium (constellation) and Ancient Greek

Antlia

Antlia (from Ancient Greek ἀντλία) is a constellation in the Southern Celestial Hemisphere. Horologium (constellation) and Antlia are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Antlia

Apparent magnitude

Apparent magnitude is a measure of the brightness of a star or other astronomical object.

See Horologium (constellation) and Apparent magnitude

Arp-Madore 1

Arp-Madore 1 (also known as AM 1) is a globular cluster visible in the constellation Horologium, located away from Earth.

See Horologium (constellation) and Arp-Madore 1

Astronomer

An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth.

See Horologium (constellation) and Astronomer

Astronomical Society of Southern Africa

The Astronomical Society of Southern Africa (ASSA), formed in 1922, is a widespread body consisting of both amateur and professional astronomers.

See Horologium (constellation) and Astronomical Society of Southern Africa

Astronomical unit

The astronomical unit (symbol: au, or AU) is a unit of length defined to be exactly equal to.

See Horologium (constellation) and Astronomical unit

Barred spiral galaxy

A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure composed of stars.

See Horologium (constellation) and Barred spiral galaxy

Bayer designation

A Bayer designation is a stellar designation in which a specific star is identified by a Greek or Latin letter followed by the genitive form of its parent constellation's Latin name.

See Horologium (constellation) and Bayer designation

Benjamin Apthorp Gould

Benjamin Apthorp Gould (September 27, 1824 – November 26, 1896) was a pioneering American astronomer.

See Horologium (constellation) and Benjamin Apthorp Gould

Beta Horologii

Beta Horologii, Latinized from β Horologii, is the third-brightest star in the southern constellation of Horologium.

See Horologium (constellation) and Beta Horologii

Binary star

A binary star or binary star system is a system of two stars that are gravitationally bound to and in orbit around each other.

See Horologium (constellation) and Binary star

Caelum

Caelum is a faint constellation in the southern sky, introduced in the 1750s by Nicolas Louis de Lacaille and counted among the 88 modern constellations. Horologium (constellation) and Caelum are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Caelum

Cambridge University Press

Cambridge University Press is the university press of the University of Cambridge.

See Horologium (constellation) and Cambridge University Press

Cape of Good Hope

The Cape of Good Hope (Kaap die Goeie Hoop) is a rocky headland on the Atlantic coast of the Cape Peninsula in South Africa.

See Horologium (constellation) and Cape of Good Hope

Carbon star

A carbon star (C-type star) is typically an asymptotic giant branch star, a luminous red giant, whose atmosphere contains more carbon than oxygen.

See Horologium (constellation) and Carbon star

Chisel

A chisel is a wedged hand tool with a characteristically shaped cutting edge on the end of its blade, for carving or cutting a hard material (e.g. wood, stone, or metal).

See Horologium (constellation) and Chisel

Circinus

Circinus is a small, faint constellation in the southern sky, first defined in 1756 by the French astronomer Nicolas-Louis de Lacaille. Horologium (constellation) and Circinus are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Circinus

Constellation

A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.

See Horologium (constellation) and Constellation

Constellation family

Constellation families are collections of constellations sharing some defining characteristic, such as proximity on the celestial sphere, common historical origin, or common mythological theme.

See Horologium (constellation) and Constellation family

Debris disk

A debris disk (American English), or debris disc (Commonwealth English), is a circumstellar disk of dust and debris in orbit around a star.

See Horologium (constellation) and Debris disk

Declination

In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.

See Horologium (constellation) and Declination

Deep-sky object

A deep-sky object (DSO) is any astronomical object that is not an individual star or Solar System object (such as Sun, Moon, planet, comet, etc.). The classification is used for the most part by amateur astronomers to denote visually observed faint naked eye and telescopic objects such as star clusters, nebulae and galaxies.

See Horologium (constellation) and Deep-sky object

Delta Horologii

Delta Horologii (δ Horologii) is a binary star system in the constellation Horologium.

See Horologium (constellation) and Delta Horologii

Dolphin

A dolphin is an aquatic mammal in the clade Odontoceti (toothed whale).

See Horologium (constellation) and Dolphin

Dorado

Dorado is a constellation in the Southern Sky. Horologium (constellation) and Dorado are southern constellations.

See Horologium (constellation) and Dorado

Double star

In observational astronomy, a double star or visual double is a pair of stars that appear close to each other as viewed from Earth, especially with the aid of optical telescopes.

See Horologium (constellation) and Double star

Dwarf galaxy

A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars.

See Horologium (constellation) and Dwarf galaxy

Effective temperature

The effective temperature of a body such as a star or planet is the temperature of a black body that would emit the same total amount of electromagnetic radiation.

See Horologium (constellation) and Effective temperature

Equatorial coordinate system

The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects.

See Horologium (constellation) and Equatorial coordinate system

Eridanus (constellation)

Eridanus is a constellation which stretches along the southern celestial hemisphere.

See Horologium (constellation) and Eridanus (constellation)

Exoplanet

An exoplanet or extrasolar planet is a planet outside the Solar System.

See Horologium (constellation) and Exoplanet

Fornax

Fornax is a constellation in the southern celestial hemisphere, partly ringed by the celestial river Eridanus. Horologium (constellation) and Fornax are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Fornax

Francis Baily

Francis Baily (28 April 177430 August 1844) was an English astronomer.

See Horologium (constellation) and Francis Baily

Giant star

A giant star has a substantially larger radius and luminosity than a main-sequence (or dwarf) star of the same surface temperature.

See Horologium (constellation) and Giant star

GJ 1061

GJ 1061 is a red dwarf star located from Earth in the southern constellation of Horologium.

See Horologium (constellation) and GJ 1061

Globular cluster

A globular cluster is a spheroidal conglomeration of stars that is bound together by gravity, with a higher concentration of stars towards its center.

See Horologium (constellation) and Globular cluster

Habitable zone

In astronomy and astrobiology, the habitable zone (HZ), or more precisely the circumstellar habitable zone (CHZ), is the range of orbits around a star within which a planetary surface can support liquid water given sufficient atmospheric pressure.

See Horologium (constellation) and Habitable zone

HD 27631

HD 27631 is a star with an orbiting exoplanet in the southern constellation of Horologium.

See Horologium (constellation) and HD 27631

Horologium in Chinese astronomy

According to traditional Chinese uranography, the modern constellation Horologium is located within the western quadrant of the sky, which is symbolized as The White Tiger of the West (西方白虎, Xī Fāng Bái Hǔ) The name of the western constellation in modern Chinese is 時鐘座 (shí zhōng zuò), meaning "the clock constellation".

See Horologium (constellation) and Horologium in Chinese astronomy

Horologium-Reticulum Supercluster

The Horologium-Reticulum Supercluster, is a massive supercluster spanning around 550 million light-years.

See Horologium (constellation) and Horologium-Reticulum Supercluster

Hyades (star cluster)

The Hyades (Greek Ὑάδες, also known as Caldwell 41, Collinder 50, or Melotte 25) is the nearest open cluster and one of the best-studied star clusters.

See Horologium (constellation) and Hyades (star cluster)

Hydrus

Hydrus is a small constellation in the deep southern sky. Horologium (constellation) and Hydrus are southern constellations.

See Horologium (constellation) and Hydrus

IAU designated constellations

In contemporary astronomy, 88 constellations are recognized by the International Astronomical Union (IAU).

See Horologium (constellation) and IAU designated constellations

International Astronomical Union

The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation.

See Horologium (constellation) and International Astronomical Union

Iota Horologii

Iota Horologii, Latinized from ι Horologii, is a yellow-hued star approximately 56.5 light-years away in the Horologium constellation.

See Horologium (constellation) and Iota Horologii

Johann Elert Bode

Johann Elert Bode (19 January 1747 – 23 November 1826) was a German astronomer known for his reformulation and popularisation of the Titius–Bode law.

See Horologium (constellation) and Johann Elert Bode

Jupiter

Jupiter is the fifth planet from the Sun and the largest in the Solar System.

See Horologium (constellation) and Jupiter

Kelvin

The kelvin, symbol K, is the base unit of measurement for temperature in the International System of Units (SI).

See Horologium (constellation) and Kelvin

Lambda Horologii

λ Horologii, Latinised as Lambda Horologii, is a star in the southern constellation of Horologium.

See Horologium (constellation) and Lambda Horologii

Latinisation of names

Latinisation (or Latinization) of names, also known as onomastic Latinisation, is the practice of rendering a non-Latin name in a modern Latin style.

See Horologium (constellation) and Latinisation of names

Lenticular galaxy

A lenticular galaxy (denoted S0) is a type of galaxy intermediate between an elliptical (denoted E) and a spiral galaxy in galaxy morphological classification schemes.

See Horologium (constellation) and Lenticular galaxy

Lexico

Lexico was a dictionary website that provided a collection of English and Spanish dictionaries produced by Oxford University Press (OUP), the publishing house of the University of Oxford.

See Horologium (constellation) and Lexico

Light-year

A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly 9,460,730,472,580.8 km (Scientific notation: 9.4607304725808 × 1012 km), which is approximately 5.88 trillion mi.

See Horologium (constellation) and Light-year

Luminosity

Luminosity is an absolute measure of radiated electromagnetic energy (light) per unit time, and is synonymous with the radiant power emitted by a light-emitting object.

See Horologium (constellation) and Luminosity

Mensa (constellation)

Mensa is a constellation in the Southern Celestial Hemisphere near the south celestial pole, one of fourteen constellations drawn up in the 18th century by French astronomer Nicolas-Louis de Lacaille. Horologium (constellation) and Mensa (constellation) are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Mensa (constellation)

Microscopium

Microscopium ("the Microscope") is a minor constellation in the southern celestial hemisphere, one of twelve created in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments. Horologium (constellation) and Microscopium are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Microscopium

Milky Way

The Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.

See Horologium (constellation) and Milky Way

Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc, denoted by the symbol, is a unit of angular measurement equal to of one degree.

See Horologium (constellation) and Minute and second of arc

Mira variable

Mira variables (named for the prototype star Mira) are a class of pulsating stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelengths.

See Horologium (constellation) and Mira variable

Monthly Notices of the Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal in astronomy, astrophysics and related fields.

See Horologium (constellation) and Monthly Notices of the Royal Astronomical Society

Mu Horologii

Mu Horologii (μ Horologii) is a solitary, yellow-white hued star in the southern constellation of Horologium.

See Horologium (constellation) and Mu Horologii

NGC 1261

NGC 1261 (also known as Caldwell 87) is a globular cluster of stars in the southern constellation of Horologium, first discovered by Scottish astronomer James Dunlop in 1826.

See Horologium (constellation) and NGC 1261

NGC 1510

NGC 1510 is a dwarf lenticular galaxy approximately 38 million light-years away from Earth in the constellation of Horologium.

See Horologium (constellation) and NGC 1510

NGC 1512

NGC 1512 is a barred spiral galaxy approximately 38 million light-years away from Earth in the constellation Horologium.

See Horologium (constellation) and NGC 1512

Nicolas-Louis de Lacaille

Abbé Nicolas-Louis de Lacaille (15 March 171321 March 1762), formerly sometimes spelled de la Caille, was a French astronomer and geodesist who named 14 out of the 88 constellations.

See Horologium (constellation) and Nicolas-Louis de Lacaille

Night sky

The night sky is the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon.

See Horologium (constellation) and Night sky

Nile

The Nile (also known as the Nile River) is a major north-flowing river in northeastern Africa.

See Horologium (constellation) and Nile

Norma (constellation)

Norma is a small constellation in the Southern Celestial Hemisphere between Ara and Lupus, one of twelve drawn up in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments. Horologium (constellation) and Norma (constellation) are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Norma (constellation)

Nu Horologii

Nu Horologii, Latinized from ν Horologii, is the Bayer designation for a single star in the southern constellation of Horologium.

See Horologium (constellation) and Nu Horologii

Octans

Octans is a faint constellation located in the deep Southern Sky. Horologium (constellation) and Octans are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Octans

Oxford University Press

Oxford University Press (OUP) is the publishing house of the University of Oxford.

See Horologium (constellation) and Oxford University Press

Pendulum

A pendulum is a device made of a weight suspended from a pivot so that it can swing freely.

See Horologium (constellation) and Pendulum

Pendulum clock

A pendulum clock is a clock that uses a pendulum, a swinging weight, as its timekeeping element.

See Horologium (constellation) and Pendulum clock

Photosphere

The photosphere is a star's outer shell from which light is radiated.

See Horologium (constellation) and Photosphere

Pictor

Pictor is a constellation in the Southern Celestial Hemisphere, located between the star Canopus and the Large Magellanic Cloud. Horologium (constellation) and Pictor are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Pictor

Po (river)

The Po is the longest river in Italy.

See Horologium (constellation) and Po (river)

Popular Astronomy is an American magazine published by John August Media, LLC and hosted at TechnicaCuriosa.com for amateur astronomers.

See Horologium (constellation) and Popular Astronomy (US magazine)

Pyxis

Pyxis is a small and faint constellation in the southern sky. Horologium (constellation) and Pyxis are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Pyxis

R Horologii

R Horologii is a red giant star approximately 760 light-years away in the southern constellation of Horologium.

See Horologium (constellation) and R Horologii

Red dwarf

A red dwarf is the smallest kind of star on the main sequence.

See Horologium (constellation) and Red dwarf

Red giant

A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.

See Horologium (constellation) and Red giant

Reticle

A reticle, or reticule also known as a graticule, is a pattern of fine lines or markings built into the eyepiece of an optical device such as a telescopic sight, spotting scope, theodolite, optical microscope or the screen of an oscilloscope, to provide measurement references during visual inspections.

See Horologium (constellation) and Reticle

Reticulum

Reticulum is a small, faint constellation in the southern sky. Horologium (constellation) and Reticulum are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Reticulum

Right ascension

Right ascension (abbreviated RA; symbol) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point in question above the Earth.

See Horologium (constellation) and Right ascension

Scientific instrument

A scientific instrument is a device or tool used for scientific purposes, including the study of both natural phenomena and theoretical research.

See Horologium (constellation) and Scientific instrument

Sculptor (constellation)

Sculptor is a faint constellation in the southern sky. Horologium (constellation) and Sculptor (constellation) are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Sculptor (constellation)

Semiregular variable star

In astronomy, a semiregular variable star, a type of variable star, is a giant or supergiant of intermediate and late (cooler) spectral type showing considerable periodicity in its light changes, accompanied or sometimes interrupted by various irregularities.

See Horologium (constellation) and Semiregular variable star

Shapley Supercluster

The Shapley Supercluster or Shapley Concentration (SCl 124) is the largest concentration of galaxies in our nearby universe that forms a gravitationally interacting unit, thereby pulling itself together instead of expanding with the universe.

See Horologium (constellation) and Shapley Supercluster

Sky & Telescope

Sky & Telescope (S&T) is a monthly American magazine covering all aspects of amateur astronomy, including the following.

See Horologium (constellation) and Sky & Telescope

Solar luminosity

The solar luminosity is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.

See Horologium (constellation) and Solar luminosity

Solar mass

The solar mass is a standard unit of mass in astronomy, equal to approximately.

See Horologium (constellation) and Solar mass

South Pole

The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is the southernmost point on Earth and lies antipodally on the opposite side of Earth from the North Pole, at a distance of 20,004 km (12,430 miles) in all directions.

See Horologium (constellation) and South Pole

Southern celestial hemisphere

The southern celestial hemisphere, also called the Southern Sky, is the southern half of the celestial sphere; that is, it lies south of the celestial equator.

See Horologium (constellation) and Southern celestial hemisphere

Springer Science+Business Media

Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing.

See Horologium (constellation) and Springer Science+Business Media

Square degree

A square degree (deg2) is a non-SI unit measure of solid angle.

See Horologium (constellation) and Square degree

Star

A star is a luminous spheroid of plasma held together by self-gravity.

See Horologium (constellation) and Star

Supercluster

A supercluster is a large group of smaller galaxy clusters or galaxy groups; they are among the largest known structures in the universe.

See Horologium (constellation) and Supercluster

Swordfish

The swordfish (Xiphias gladius), also known as the broadbill in some countries, are large, highly migratory predatory fish characterized by a long, flat, pointed bill.

See Horologium (constellation) and Swordfish

Table Mountain

Table Mountain (lit; Tafelberg) is a flat-topped mountain forming a prominent landmark overlooking the city of Cape Town in South Africa.

See Horologium (constellation) and Table Mountain

Telescopium

Telescopium is a minor constellation in the southern celestial hemisphere, one of twelve named in the 18th century by French astronomer Nicolas-Louis de Lacaille and one of several depicting scientific instruments. Horologium (constellation) and Telescopium are constellations listed by Lacaille and southern constellations.

See Horologium (constellation) and Telescopium

TW Horologii

TW Horologii is a carbon star and semiregular variable in the southern constellation of Horologium, near the eastern constellation border with Reticulum.

See Horologium (constellation) and TW Horologii

Variable star

A variable star is a star whose brightness as seen from Earth (its apparent magnitude) changes with time.

See Horologium (constellation) and Variable star

Water snake

Different snakes are called water snakes.

See Horologium (constellation) and Water snake

23rd parallel north

The 23rd parallel north is a circle of latitude that is 23 degrees north of the Earth's equatorial plane, about south of the Tropic of Cancer.

See Horologium (constellation) and 23rd parallel north

30th parallel north

The 30th parallel north is a circle of latitude that is 30 degrees north of the Earth's equatorial plane.

See Horologium (constellation) and 30th parallel north

50th parallel north

The 50th parallel north is a circle of latitude that is 50 degrees north of the Earth's equatorial plane.

See Horologium (constellation) and 50th parallel north

See also

Constellations listed by Lacaille

Southern constellations

References

[1] https://en.wikipedia.org/wiki/Horologium_(constellation)

Also known as Clock (constellation), Constellation Horologium, Horologium constellation.

, Johann Elert Bode, Jupiter, Kelvin, Lambda Horologii, Latinisation of names, Lenticular galaxy, Lexico, Light-year, Luminosity, Mensa (constellation), Microscopium, Milky Way, Minute and second of arc, Mira variable, Monthly Notices of the Royal Astronomical Society, Mu Horologii, NGC 1261, NGC 1510, NGC 1512, Nicolas-Louis de Lacaille, Night sky, Nile, Norma (constellation), Nu Horologii, Octans, Oxford University Press, Pendulum, Pendulum clock, Photosphere, Pictor, Po (river), Popular Astronomy (US magazine), Pyxis, R Horologii, Red dwarf, Red giant, Reticle, Reticulum, Right ascension, Scientific instrument, Sculptor (constellation), Semiregular variable star, Shapley Supercluster, Sky & Telescope, Solar luminosity, Solar mass, South Pole, Southern celestial hemisphere, Springer Science+Business Media, Square degree, Star, Supercluster, Swordfish, Table Mountain, Telescopium, TW Horologii, Variable star, Water snake, 23rd parallel north, 30th parallel north, 50th parallel north.