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Andromeda, Ethiopian Princess Constellation Facts and Mythology

Andromeda Constellation Star Map

Andromeda (Pronounciation:An-drom-e-da, Abbrev:And, Latin:Andromedae) is a constellation, one of 88 constellations that the night sky is divided into. The sky is not divided up equally between the constellations. Andromeda takes up 722.278 sq. degrees of the night sky which equates to 1.75% of the night sky. Andromeda is the 19th largest in terms of size in the night sky.

The constellation name means Ethiopian Princess . 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 8 stars that make up the main constellation. The hipparcos satellite scanned and detailed 2112 stars. There are 80 stars that can be seen with the naked eye in the constellation on a very clear night sky.

Andromeda is not a member of the Zodiac group of twelve constellations that appear when the Sun sets. Andromeda is a northern hemispheric constellation which means it can't be seen easily or at all from the southern hemisphere.

The distance to Andromeda is not calculable because all the stars that make up the constellation are at various distances. The best answer for distance to Andromeda is to calculate the average distance of the stars.

There are 24 Extrasolar Planets (Exoplanets) in this constellation that are detailed on this site. There is a dedicated page for exoplanets in Andromeda.

There are 3 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.

Andromeda 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.

Groombridge 34, Nearest Star

The nearest star to Earth is Groombridge 34 which is roughly about 11.7 Light Years from the Earth. The nearest star to the Earth with an exoplanet is Titawin which is about 44 Light Years.

HIP 2396, Furthest Star

The furthest star that is located in the constellation is HIP 2396 and it is 326163.3 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.

Mirach, Brightest Star in Andromeda

The brightest star in Andromeda is Mirach and is located about 53.88 light years from the Sun. The star has a apparent magnitude of 2.07 but an absolute magnitude of -1.84 when the star is viewed from a distance of 10 Parsecs or 32.6 Light Years. The star is only recognised as being Beta Andromedae rather than having Alpha status.

HD 5608, Dimmest Visible Star

The dimmest star that can be seen in Andromeda with the naked eye is HD 5608. The dim star has an apparent magnitude of 5.99. 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.

The number of stars that have been catalogued as part of the Hipparcos Star Catalogue from Andromeda is 2112. The number of stars that are of magnitude 6.0 or lower in the constellation is 80. The number of stars in the constellation that make up the outline is 8.


The star Alpheratz (Alpha Andromedae) is the brightest star in the constellation and also forms one corner of the square in Pegasus. It is sometimes referred to as Delta Pegasi to note its location.

Andromeda Mythology

Andromeda was the daughter of Queen Cassiopeia and King Cepheus, rulers of the kingdom of Philistia. The kingdom is now more closely associated with the African country of Ethiopia. The Queen was so jealous of her daughter's looks that she had her tied to a large rock. The Queen hoped the whale, Cetus, would kill her. She was saved by Perseus who then became his bride. The story is immortalised in the film 'Clash of the Titans

Deep Space Objects in Andromeda

There are 3 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.

Andromeda Galaxy

The galaxy boasts one of our closest neighbouring galaxy, M31, Andromeda Galaxy. Our Galaxy, the Milky Way is reckoned to be 100,000 light years across but the Andromeda Galaxy is twice the size. It is expected to collide with our galaxy but don't worry, it won't happen for another 5 billion years at least. When it does, no one on Earth will be around to see it. All life on Earth will have gone after the Sun has grown large and heated the Sun. It is not the nearest galaxy to us, the Canis MajorDwarf Galaxy takes that title.

The Andromeda Galaxy has been to shown to have planets in orbit round some of its star. The galaxy is the furthest object in space that one can see with the naked eye. You won't be able to see the galaxy in much detail but you'll be able to see it as a fuzzy patch.

Meteor Showers Radiating from Andromeda

There are 11 Meteor Showers that occur during the year within this constellation based on information gathered from Adam Mickiewicz University (Poland). The list below are major ones and which I have a date period for.

NameActivityPeak ActivityClosest Star
AndromedidsOct 26-Nov 20Nov 08Cih

List of Main Stars in Andromeda

The following list contains the stars that make up the constellation. For a larger list of stars in the entire constellation area, please visit the For a list of named stars, that is stars that don't start HD or HIP, please visit Andromeda Star List page.

NameBayerDistance (Lt.Yr.)Right AscensionDeclinationSpectral TypeColour
AlpheratzAlpha Andromedae97.0100h 08m 23.17+29d 05` 27.0B9pBlue/White
MirachBeta Andromedae197.4401h 09m 43.80+35d 37` 15.0M0IIIvarRed
AlmachGamma Andromedae392.9702h 03m 53.92+42d 19` 47.5B8VBlue/White
Delta AndromedaeDelta Andromedae105.5200h 39m 19.60+30d 51` 40.4K3III...Orange
Mu AndromedaeMu Andromedae129.7400h 56m 45.10+38d 29` 57.3A5VWhite
Pi AndromedaePi Andromedae598.4600h 36m 52.84+33d 43` 09.7B5VBlue/White
NembusUpsilon Persei177.1701h 37m 59.50+48d 37` 42.6K3IIIOrange
49 Andromedae294.1101h 30m 06.10+47d 00` 26.6K0IIIOrange

Andromeda Facts

Is a Zodiac Sign No
Brightest StarMirach
Area722.278 sq. deg.
Percentage of Night Sky1.75%
Size Position19th
Hemisphere Northern
Site Exoplanet Count24
Meteor Shower Count11
Nearest StarGroombridge 34
Nearest Star with Exoplanet(s)Titawin
Brightest StarMirach
Dimmest StarHD 5608
Furthest StarHIP 2396
Bright Star Count80
Hipparcos Star Count2112
Main Star Count8
Messier Deep Space Object Count3
*Non-Messier Deep Space Object Count0

*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 Andromeda

NameTypeDistanceDeclinationRight Ascension
Andromeda Galaxy (M31, NGC224)Spiral Galaxy2,430-2,650 kly+41:1600h 42m 7
Le Gentil Satellite Galaxy of M31 (M32, NGC221)Satiellite Galaxy of M312,410-2,570 kly+40:5200h 42m 7
Messier 110 (NGC205)Satiellite Galaxy of M312,600-2,780 kly+41:4100h 40m 4

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