Logo
Unionpedia
Communication
Get it on Google Play
New! Download Unionpedia on your Android™ device!
Install
Faster access than browser!
 

Chi1 Hydrae

+ Save concept

Chi1 Hydrae (χ1 Hya) is a binary star in the equatorial constellation of Hydra. [1]

24 relations: Apparent magnitude, Bayer designation, Binary star, Bright Star Catalogue, Catalogues of Fundamental Stars, Chi Hydrae, Constellation, Durchmusterung, Epoch (astronomy), Flamsteed designation, Gliese Catalogue of Nearby Stars, Henry Draper Catalogue, Hipparcos, Hydra (constellation), International Celestial Reference System, Light-year, Minute and second of arc, Monthly Notices of the Royal Astronomical Society, Orbital eccentricity, Orbital period, Smithsonian Astrophysical Observatory Star Catalog, Solar mass, Stellar parallax, Sun.

Apparent magnitude

The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.

New!!: Chi1 Hydrae and Apparent magnitude · See more »

Bayer designation

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

New!!: Chi1 Hydrae and Bayer designation · See more »

Binary star

A binary star is a star system consisting of two stars orbiting around their common barycenter.

New!!: Chi1 Hydrae and Binary star · See more »

Bright Star Catalogue

The Bright Star Catalogue, also known as the Yale Catalogue of Bright Stars or Yale Bright Star Catalogue, is a star catalogue that lists all stars of stellar magnitude 6.5 or brighter, which is roughly every star visible to the naked eye from Earth.

New!!: Chi1 Hydrae and Bright Star Catalogue · See more »

Catalogues of Fundamental Stars

The Catalogue of Fundamental Stars is a series of six astrometric catalogues of high precision positional data for a small selection of stars to define a celestial reference frame, which is a standard coordinate system for measuring positions of stars.

New!!: Chi1 Hydrae and Catalogues of Fundamental Stars · See more »

Chi Hydrae

The Bayer designation Chi Hydrae (χ Hya / χ Hydrae) is shared by two star systems, in the constellation Hydra.

New!!: Chi1 Hydrae and Chi Hydrae · See more »

Christmas

Christmas is an annual festival commemorating the birth of Jesus Christ,Martindale, Cyril Charles.

New!!: Chi1 Hydrae and Christmas · See more »

Christmas and holiday season

The Christmas season, also called the festive season, or the holiday season (mainly in the U.S. and Canada; often simply called the holidays),, is an annually recurring period recognized in many Western and Western-influenced countries that is generally considered to run from late November to early January.

New!!: Chi1 Hydrae and Christmas and holiday season · See more »

Christmas Eve

Christmas Eve is the evening or entire day before Christmas Day, the festival commemorating the birth of Jesus.

New!!: Chi1 Hydrae and Christmas Eve · See more »

Christmas traditions

Christmas traditions vary from country to country.

New!!: Chi1 Hydrae and Christmas traditions · See more »

Constellation

A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.

New!!: Chi1 Hydrae and Constellation · See more »

Durchmusterung

In astronomy, Durchmusterung or Bonner Durchmusterung (BD), is the comprehensive astrometric star catalogue of the whole sky, compiled by the Bonn Observatory (Germany) from 1859 to 1903.

New!!: Chi1 Hydrae and Durchmusterung · See more »

Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

New!!: Chi1 Hydrae and Epoch (astronomy) · See more »

Flamsteed designation

A Flamsteed designation is a combination of a number and constellation name that uniquely identifies most naked eye stars in the modern constellations visible from southern England.

New!!: Chi1 Hydrae and Flamsteed designation · See more »

Gliese Catalogue of Nearby Stars

The Gliese Catalogue of Nearby Stars is a modern star catalogue of stars located within 25 parsecs (81.54 ly) of the Earth.

New!!: Chi1 Hydrae and Gliese Catalogue of Nearby Stars · See more »

Henry Draper Catalogue

The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars.

New!!: Chi1 Hydrae and Henry Draper Catalogue · See more »

Hipparcos

Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.

New!!: Chi1 Hydrae and Hipparcos · See more »

Hydra (constellation)

Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees.

New!!: Chi1 Hydrae and Hydra (constellation) · See more »

International Celestial Reference System

The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).

New!!: Chi1 Hydrae and International Celestial Reference System · See more »

Light-year

The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.

New!!: Chi1 Hydrae and Light-year · See more »

Minute and second of arc

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

New!!: Chi1 Hydrae and Minute and second of arc · See more »

Monthly Notices of the Royal Astronomical Society

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

New!!: Chi1 Hydrae and Monthly Notices of the Royal Astronomical Society · See more »

New Year

New Year is the time or day at which a new calendar year begins and the calendar's year count increments by one.

New!!: Chi1 Hydrae and New Year · See more »

New Year's Day

New Year's Day, also called simply New Year's or New Year, is observed on January 1, the first day of the year on the modern Gregorian calendar as well as the Julian calendar.

New!!: Chi1 Hydrae and New Year's Day · See more »

New Year's Eve

In the Gregorian calendar, New Year's Eve (also known as Old Year's Day or Saint Sylvester's Day in many countries), the last day of the year, is on 31 December which is the seventh day of Christmastide.

New!!: Chi1 Hydrae and New Year's Eve · See more »

Orbital eccentricity

The orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle.

New!!: Chi1 Hydrae and Orbital eccentricity · See more »

Orbital period

The orbital period is the time a given astronomical object takes to complete one orbit around another object, and applies in astronomy usually to planets or asteroids orbiting the Sun, moons orbiting planets, exoplanets orbiting other stars, or binary stars.

New!!: Chi1 Hydrae and Orbital period · See more »

Smithsonian Astrophysical Observatory Star Catalog

The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.

New!!: Chi1 Hydrae and Smithsonian Astrophysical Observatory Star Catalog · See more »

Solar mass

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

New!!: Chi1 Hydrae and Solar mass · See more »

Stellar parallax

Stellar parallax is the apparent shift of position of any nearby star (or other object) against the background of distant objects.

New!!: Chi1 Hydrae and Stellar parallax · See more »

Sun

The Sun is the star at the center of the Solar System.

New!!: Chi1 Hydrae and Sun · See more »

2018

2018 has been designated as the third International Year of the Reef by the International Coral Reef Initiative.

New!!: Chi1 Hydrae and 2018 · See more »

2019

2019 (MMXIX) will be a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.

New!!: Chi1 Hydrae and 2019 · See more »

Redirects here:

9 Crateris, Χ1 Hydrae.

References

[1] https://en.wikipedia.org/wiki/Chi1_Hydrae

OutgoingIncoming
Hey! We are on Facebook now! »