Constellation Orion (Orion)
Constellation Orion (Orion) is one of the 88 official IAU constellations, with 8 catalogued bright stars. Sky centre at RA 83°, Dec 6°. Genitive form: Orionis.
Bright stars in Orion
| Name | Bayer | Magnitude | Type | Distance (ly) |
|---|---|---|---|---|
| Rigel | beta Ori | 0.13 | B8Iab | 860.0 |
| Betelgeuse | alpha Ori | 0.50 | M2Iab | 643.0 |
| Bellatrix | gamma Ori | 1.64 | B2III | 250.0 |
| Alnilam | epsilon Ori | 1.69 | B0Ia | 1,340.0 |
| Alnitak | zeta Ori | 1.74 | O9.7Ib | 800.0 |
| Alnitak-A | zeta Ori A | 1.79 | O9.5Ib | 800.0 |
| Saiph | kappa Ori | 2.06 | B0.5Ia | 720.0 |
| Mintaka | delta Ori | 2.23 | O9.5II | 1,200.0 |
About the constellation
Orion is one of the 88 official constellations of the International Astronomical Union, defined by the IAU in 1922 with precise boundaries established by Eugene Delporte in 1930. The genitive form Orionis is used to name stars via Bayer designation (e.g., alpha Orionis = the brightest star).
Other constellations
And Ant Aps Aql Aqr Ara Ari Aur Boo Cae Cam Cnc CVn CMa CMi Cap Car Cas Cen Cep Cet Cha Cir Col Com CrA CrB Crv Crt Cru Cyg Del Dor Dra Equ Eri For Gem Gru Her Hor Hya Hyi Ind Lac Leo LMi Lep Lib Lup Lyn Lyr Men Mic Mon Mus Nor Oct Oph Pav Peg Per Phe Pic Psc PsA Pup Pyx Ret Sge Sgr Sco Scl Sct Ser Sex Tau Tel Tri TrA Tuc UMa UMi Vel Vir Vol Vul