Universe Guide

Equuleus, The Horse Constellation

Equuleus Constellation Star Map

Equuleus (Pronounciation:Ek-we-lee-us, Abbrev:Equ, Latin:Equulei) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Equuleus takes up 71.641 sq. degrees of the night sky which equates to 0.17% of the night sky. Equuleus is the 87th largest in terms of size in the night sky.

The constellation name means The Horse . The constellation is one of the original constellations that was devised by the Ancient Greco-Egyptian astronomer Ptolemy who lived between 90 A.D. and 168 A.D.

There are 4 stars that make up the main constellation. The hipparcos satellite scanned and detailed 170 stars. There are 11 stars that can be seen with the naked eye in the constellation on a very clear night sky.

Equuleus is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Equuleus is an equatorial constellation that can be seen by countries nearest the Equator.

There are 5 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site. There is a dedicated page for exoplanets in Equuleus.

There are no deep space objects that were identified by Charles Messier in this constellation. There are no non-Messier deep space objects in this constellation that are covered at present on this site.

The image at the top right of this page was generated using Night Vision, a free to use and download application by Brian Simspon.

Distance to Equuleus

You can't just go to one location and arrive at the constellation because the constellation is made up of stars at different locations and different distances. The nearest main star in the constellation is at a distance of 60.30 light years and the furthest main star is a distance of 330.79 light years. The average distance to the main stars is 174.94 light years.

Equuleus Star Facts

The caveat of these stars are that they are catalogued on this site. If you know of a star that is nearer or further then do let me know in the comments and I'll add it to the site. The stars mentioned are from the Hipparcos catalogue or have been added because of their special status.

Gliese 818, Equuleus's Nearest Star

The nearest star to Earth is Gliese 818 which is roughly about 49.11 Light Years from the Earth. The nearest star to the Earth with an exoplanet is HD 200964 which is about 235.5 Light Years.

HIP 103586, Equuleus's Furthest Star

The furthest star that is located in the constellation is HIP 103586 and it is 81540.84 light years away from the Sun. The furthest figure is derived from either the 1997 or 2007 Hipparcos star catalogue parallax figure and it has been known to produce distances that are wrong.

Kitalpha, Brightest Star in Equuleus

The brightest star in Equuleus is Kitalpha and is located about 55.90 light years from the Sun. The star has a apparent magnitude of 3.92 but an absolute magnitude of 0.09 when the star is viewed from a distance of 10 Parsecs or 32.6 Light Years. The star is recognised as being the brightest in the constellation as it has the Bayer status of Alpha.

HD 199942, Equuleus's Dimmest Visible Star

The dimmest star that can be seen in Equuleus with the naked eye is HD 199942. The dim star has an apparent magnitude of 5.98. The dimmest star that a person is able to see with their naked eye is 6.0 magnitude based on the table in the reference. Ref: University of Michigan.

Equuleus Mythology

Equuleus was a horse known as Celaris, the foal brother of Pegasus who was given to Mercury by Castor. Pegasus was the mythological winged horse that was tamed by Perseus on his quest to save Andromeda from being eaten by Cetus, the sea whale.

Equuleus Facts

Is a Zodiac Sign No
Brightest StarKitalpha
Area71.641 sq. deg.
Percentage of Night Sky0.17%
Size Position87th
Hemisphere Equatorial
Site Exoplanet Count5
Meteor Shower Count2
Nearest StarGliese 818
Nearest Star with Exoplanet(s)HD 200964
Brightest StarKitalpha
Dimmest StarHD 199942
Furthest StarHIP 103586
Bright Star Count11
Hipparcos Star Count170
Main Star Count4
Messier Deep Space Object Count0
Bordering / Neighbouring / Surrounding ConstellationsDelphinus

*Note: The number of Non-Messier Deep Space Object Count relates to how many are covered on this site not how many there are.

List of Deep Space Objects (Galaxies, Nebulas, Supernovas, etc) in Equuleus

NameTypeDistanceDeclinationRight Ascension
NGC 7015Galaxy in a Group of Galaxies+11 24 51.1521 05 37m 390
NGC 7040Spiral Galaxy+08 51 54.1221 13 16m 516
NGC 7046Barred Spiral Galaxy+02 50 05.3921 14 56m 030

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