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Ara (abbreviation: Ara, genitive: Arae)





The Altar; a small southern constellation that is rich in star clusters. See below for details of the constellation's brightest stars and interesting deep sky objects.


Ara constellation
Ara. © 2003 Torsten Bronger.
Copied here under the terms of the GNU Free Documentation License



Stars brighter than magnitude 4.0
Star Visual
mag.
Abs.
mag.
Spectral
type
Distance
(lt-yr)
R.A. (h m s) Dec. ( ° ' '' )
Beta 2.84 -3.50 K3Ib-IIa 603 17 25 18 -55 31 47
Alpha (Choo) 2.84 -1.52 B2Vne 242 17 31 50 -49 52 34
Zeta 3.12 -3.11 K3III 574 16 58 37 -55 59 24
Gamma 3.31 -4.40 B1Ib 1,140 17 25 24 -56 22 39
Delta 3.60 -0.20 B8Vn 187 17 31 06 -60 41 01
Theta 3.65 -3.81 B2Ib 1,010 18 06 38 -50 05 30
Eta 3.77 -1.14 K5III 313 16 49 47 -59 02 29


Other objects of interest
Name Type of Object Notes
NGC 6193 open cluster A good object for binoculars, containing about 30 stars. Magnitude 5.2; diameter 15'; R.A. 16h 38m, Dec -48° 40'
IC 4651 open cluster Richer but fainter than NGC 6193 and requires a small telescope. Magnitude 7.1; diameter 12'; distance 3,600 light-years; R.A. 17h 21m, Dec. -49° 54'
NGC 6397 globular cluster The brightest of three easy globulars in Ara; it can be glimpsed with the naked eye and looks like a misty patch in small instruments. At a distance of about 8,200 light-years, it may be the second closest globular to Earth after M4. Magnitude 5.6; diameter 25.7'; R.A. 17h 37m, Dec. -53° 39'


Constellations
Andromeda | Antlia | Apus | Aquarius | Aquila | Ara | Aries | Auriga | Bootes | Caelum | Camelopardalis | Cancer | Canes Venatici | Canis Major | Canis Minor | Capricornus | Carina | Cassiopeia | Centaurus | Cepheus | Cetus | Chamaeleon | Circinus | Columba | Coma Berenices | Corona Austrina | Corona Borealis | Corvus | Crater | Crux | Cygnus | Delphinus | Dorado | Draco | Equuleus | Eridanus | Fornax | Gemini | Grus | Hercules | Horologium | Hydra | Hydrus | Indus | Lacerta | Leo | Leo Minor | Lepus | Libra | Lupus | Lynx | Lyra | Mensa | Microscopium | Monoceros | Musca | Norma | Octans | Ophiuchus | Orion | Pavo | Pegasus | Perseus | Phoenix | Pictor | Pisces | Piscis Austrinus | Puppis | Pyxis | Reticulum | Sagitta | Sagittarius | Scorpius | Sculptor | Scutum | Serpens | Sextans | Taurus | Telescopium | Triangulum | Triangulum Australe | Tucana | Ursa Major | Ursa Minor | Vela | Virgo | Volans | Vulpecula


Related categories

   • NOTABLE STARS
   • NEBULAE AND STAR CLUSTERS
   • GALAXIES