Table of Contents
25 relations: Absolute magnitude, Apparent magnitude, Astronomical naming conventions, Astronomy & Astrophysics, Bayer designation, Constellation, Cosmic distance ladder, Declination, Flamsteed designation, GJ 3634, GJ 3634 b, Gould designation, Henry Draper Catalogue, Hipparcos, Hydra (constellation), Light-year, Lists of stars by constellation, Monthly Notices of the Royal Astronomical Society, Right ascension, Star, Stellar classification, The Astronomical Journal, The Astrophysical Journal, Variable-star designation, WASP-36.
Absolute magnitude
In astronomy, absolute magnitude is a measure of the luminosity of a celestial object on an inverse logarithmic astronomical magnitude scale.
See List of stars in Hydra and Absolute magnitude
Apparent magnitude
Apparent magnitude is a measure of the brightness of a star or other astronomical object.
See List of stars in Hydra and Apparent magnitude
Astronomical naming conventions
In ancient times, only the Sun and Moon, a few stars, and the most easily visible planets had names.
See List of stars in Hydra and Astronomical naming conventions
Astronomy & Astrophysics
Astronomy & Astrophysics (A&A) is a monthly peer-reviewed scientific journal covering theoretical, observational, and instrumental astronomy and astrophysics.
See List of stars in Hydra and Astronomy & Astrophysics
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 List of stars in Hydra and Bayer designation
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 List of stars in Hydra and Constellation
Cosmic distance ladder
The cosmic distance ladder (also known as the extragalactic distance scale) is the succession of methods by which astronomers determine the distances to celestial objects.
See List of stars in Hydra and Cosmic distance ladder
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 List of stars in Hydra and Declination
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.
See List of stars in Hydra and Flamsteed designation
GJ 3634
Extrasolar PlanetsEncyclopaedia GJ 3634 (sometimes Gliese 3634) is a red dwarf star in the Hydra constellation. List of stars in Hydra and GJ 3634 are Hydra (constellation).
See List of stars in Hydra and GJ 3634
GJ 3634 b
GJ 3634 b (sometimes Gliese 3634 b) is a super-Earth exoplanet in the orbit of the nearby red dwarf GJ 3634 at approximately 64.5 light-years in constellation Hydra.
See List of stars in Hydra and GJ 3634 b
Gould designation
Gould designations for stars are similar to Flamsteed designations in the way that they number stars within a constellation in increasing order of right ascension.
See List of stars in Hydra and Gould designation
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.
See List of stars in Hydra and Henry Draper Catalogue
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
See List of stars in Hydra and Hipparcos
Hydra (constellation)
Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees, and also the longest at over 100 degrees.
See List of stars in Hydra and Hydra (constellation)
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 List of stars in Hydra and Light-year
Lists of stars by constellation
All stars but one can be associated with an IAU (International Astronomical Union) constellation.
See List of stars in Hydra and Lists of stars by constellation
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 List of stars in Hydra and Monthly Notices of the Royal Astronomical Society
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 List of stars in Hydra and Right ascension
Star
A star is a luminous spheroid of plasma held together by self-gravity.
See List of stars in Hydra and Star
Stellar classification
In astronomy, stellar classification is the classification of stars based on their spectral characteristics.
See List of stars in Hydra and Stellar classification
The Astronomical Journal
The Astronomical Journal (often abbreviated AJ in scientific papers and references) is a peer-reviewed monthly scientific journal owned by the American Astronomical Society (AAS) and currently published by IOP Publishing.
See List of stars in Hydra and The Astronomical Journal
The Astrophysical Journal
The Astrophysical Journal (ApJ) is a peer-reviewed scientific journal of astrophysics and astronomy, established in 1895 by American astronomers George Ellery Hale and James Edward Keeler.
See List of stars in Hydra and The Astrophysical Journal
Variable-star designation
In astronomy, a variable-star designation is a unique identifier given to variable stars.
See List of stars in Hydra and Variable-star designation
WASP-36
WASP-36 is a yellow main sequence star in the Hydra constellation. List of stars in Hydra and WASP-36 are Hydra (constellation).
See List of stars in Hydra and WASP-36
References
Also known as 1 Hydrae, 10 Hydrae, 14 Hydrae, 14 Librae, 15 Hydrae, 17 Hydrae, 19 Hydrae, 2 Hydrae, 20 Hydrae, 21 Hydrae, 23 Hydrae, 24 Hydrae, 25 Hydrae, 28 Hydrae, 29 Hydrae, 2MASS J14563831-2809473, 3 Hydrae, 33 Hydrae, 34 Hydrae, 37 Hydrae, 44 Hydrae, 47 Hydrae, 48 Hydrae, 50 Hydrae, 54 Hydrae, 55 Hydrae, 56 Hydrae, 57 Hydrae, 59 Hydrae, 60 Hydrae, G 161-71, GJ 3877, Gliese 349, HD 82106, HD 93397, HD 94046, HD 94388, LHS 3003, LP 914-54, NLTT 38829, PLX 3372.03.