Alpheratz (Alpha Andromedae)
Credit: 2005 Torsten Bronger
The brightest star in the constellation Andromeda and the northeastern star of the Square of Pegasus.
ALPHERATZ (Alpha Andromedae). Andromeda runs like a string of pearls to the northeast of the Great Square of Pegasus.
Alpheratz A is a blue B8IVpMnHg subgiant star, peculiar because of the unusual strength of mercury and manganese in its spectrum. The star is 5 times larger than the sun in diameter and 110 times more luminous.
Alpheratz, Sirrah, Sirah, α And, Alpha Andromedae, Alpha And, δ Pegasi, δ Peg, Delta Pegasi, Delta Peg, 21 Andromedae, 21 And, H 5 32A, MKT 11, ADS 94 A, BD+284, CCDM J00083+2905A, FK5 1, GC 127, HD 358, HIP 677, HR 15, IDS 00032+2832 A, ...
ALPHERATZ (Alpha And)
MIRACH (Beta And)
ALMAAK (Gamma 1 And)
Adhil (Xi And) ...
The names Alpheratz and Sirrah both derive from the original Arabic name, صرة ا"فرس şirrat al-faras, "navel of the steed".
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Named Stars: ALPHERATZ (Alpha And) MIRACH (Beta And) ALMAAK (Gamma 1 And) Adhil (Xi And)
Andromeda is a V-shaped constellation surrounded by her family. Cassiopeia, Cepheus, and Perseus are all near-by.
Name Alpha Star And Andromeda Andromeda Alpheratz (Sirrah) Ant Antlia Air Pumpe Aps Apus Bird of Paradise Aqr Aquarius Water Carrier Aql Aquila Eagle Altair Ara Ara Altar Ari Aries Ram Hamal Aur Auriga Charioteer Capella Boo Bootes Bear Driver ...
It lies in the northwestern corner (0:39:21.8+21:15:1.7, ICRS 2000.0) of Constellation Pisces -- northeast of Algenib (Gamma Pegasi), southeast of Alpheratz (Alpha Andromedae), southwest of Delta Andromedae and Mirach (Beta Andromedae), ...
Brightest Stars: Alpheratz, Mirach, Almach
Finding Andromeda: Andromeda is basically the group of stars below Cassiopeia, the main part of the constellation forming an arc stretching nearly 30 degrees across the sky.
" It is also known as Alpheratz or Sirrah, both names derived from the Arabic name "surrat al-faras," meaning 'the navel of the horse.' Because of its location, immediately northeast of the Pegasus constellation, it is also known as delta Pegasi.
The asterism consists of the brightest star, Alpheratz (or Sirrah) denoting Andromeda's head, and the rest of the principal stars marking other parts of the young woman's body.
Named stars: Alpha And (Alpheratz/Sirrah), Beta And (Mirach), Gamma And (Alamak)
Info: Andromeda contains the Andromeda Galaxy (M31/NGC224), which is the nearest spiral galaxy to our own galaxy and the largest object of the Local Group of galaxies.
Andromeda: Adhil (ξ And), Almak (Almach, γ1 And), Alpheratz (or Sirrah, α And, = δ Peg), Mirach (β And). Sadiradra (δ And), ...
The best way to find Andromeda is to first find Pegasus, the winged horse. The Princess' head is the star Alpheratz, which is also the last star in Pegasus. This same star is the base of the "V". Can you find the rest of the constellation?
One of the stars (Alpheratz) is actually now over the boundary into the constellation Andromeda. The other three stars are in Pegasus. All are between 2nd and 3rd magnitude. There are no brighter stars in the square.
One of the four stars in the asterism known as the Great Square of Pegasus (Alpheratz, Scheat, Markab, Algenib) (The NW corner star.)
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Phecda ...
This star is known by the two alternative names of Alpheratz or Sirrah which come respectively from the Arabic al-faras, meaning ‘the horse', and surrat, meaning ‘navel'. The star is now assigned exclusively to Andromeda.
 See also: Alpherat, Andromeda, Constellation, Pegasus, Sky
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