Aries (constellation)

Aries
Constellation
Aries
AbbreviationAri[1]
GenitiveArietis
Pronunciation/ˈɛərz/,
genitive /əˈrətəs/, /ˌæriˈɛtəs/
Symbolismthe Ram
Right ascension01h 46m 37.3761s03h 29m 42.4003s[2]
Declination31.2213154°–10.3632069°[2]
Area441[3] sq. deg. (39th)
Main stars4, 9
Bayer/Flamsteed
stars
61
Stars with planets6
Stars brighter than 3.00m2
Stars within 10.00 pc (32.62 ly)2[a]
Brightest starHamal (α Ari) (2.01m)
Messier objects0
Meteor showers
  • May Arietids
  • Autumn Arietids
  • Delta Arietids
  • Epsilon Arietids
  • Daytime-Arietids
  • Aries-Triangulids
Bordering
constellations
Visible at latitudes between +90° and −60°.
Best visible at 21:00 (9 p.m.) during the month of December.

Aries is one of the constellations of the zodiac. It is located in the Northern celestial hemisphere between Pisces to the west and Taurus to the east. The name Aries is Latin for ram. Its old astronomical symbol is (♈︎). It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations. It is a mid-sized constellation ranking 39th in overall size, with an area of 441 square degrees (1.1% of the celestial sphere).

Aries has represented a ram since late Babylonian times. Before that, the stars of Aries formed a farmhand. Different cultures have incorporated the stars of Aries into different constellations including twin inspectors in China and a porpoise in the Marshall Islands. Aries is a relatively dim constellation, possessing only four bright stars: Hamal (Alpha Arietis, second magnitude), Sheratan (Beta Arietis, third magnitude), Mesarthim (Gamma Arietis, fourth magnitude), and 41 Arietis (also fourth magnitude). The few deep-sky objects within the constellation are quite faint and include several pairs of interacting galaxies. Several meteor showers appear to radiate from Aries, including the Daytime Arietids and the Epsilon Arietids.

  1. ^ Russell 1922, p. 469.
  2. ^ a b "Aries, constellation boundary". The Constellations. International Astronomical Union. Retrieved 14 February 2014.
  3. ^ a b Thompson & Thompson 2007, pp. 90–91.
  4. ^ RECONS, The 100 Nearest Star Systems.


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