Iota Orionis
Sign in to saveAlso known as Hatysa, HD 37043, 44 Orionis, 44 Ori, ι Orionis, ι Ori, Parenago 2037, WH 301
star in the constellation Orion
Astronomical data · SIMBAD
- Object type
- SB*
- Spectral type
- O9IIIvar
- Distance
- 1,633 light-years
- Redshift
- z = 0.00009206792852634038
- Coordinates
- RA 83.8583° · Dec -5.9099°
via SIMBAD · CDS Strasbourg
Key facts
- Constellation
- Orion
- Right ascension
- 05 35 25.98191
- Declination
- −05 ° 54 ′ 35.6435 ″
- Spectral type
- O9 III + B0.8 III/IV + B2:IV:
- U b color index
- −1.08
- B v color index
- −0.24
- Variable type
- Orion
via Wikipedia infobox
Wikidata facts
- Instance of
- binary star
- Constellation
- Orion
- Mass
- 1.236
- Variable-star type
- Orion variable
- Image
- The Orion Nebula M42.jpg
Show 15 more facts
- spectral class
- O8.5.SB
- catalog code
- ALS 14790
- stellar rotational velocity
- 99
- apparent magnitude
- 3.46
- parallax
- 2.46
- right ascension
- 83.85825794708
- declination
- -5.90990098250
- effective temperature
- 18000
- radial velocity
- 30.1
- epoch
- J2000.0
- metallicity
- 0.10
- absolute magnitude
- 3.65
- right ascension component of proper motion
- 0
- declination component of proper motion
- 5
- surface gravity
- 10000
Sources (2)
via Wikidata · CC0
~5 min read
Encyclopedic overview
Iota Orionis (ι Orionis, abbreviated ι Ori) is a multiple star system in the equatorial constellation of Orion the hunter. It is the eighth-brightest member of Orion with an apparent visual magnitude of 2.77 and also the brightest member of the asterism known as Orion's Sword. It is a member of the NGC 1980 open cluster. From parallax measurements, it is located at a distance of roughly 1,340 light-years (412 parsecs) from the Sun.
The system has three visible components designated Iota Orionis A, B and C. Iota Orionis A has also been resolved using speckle interferometry and is also a massive spectroscopic binary, with components Iota Orionis Aa1 (officially named Hatysa /hɑːˈtiːsə/), Aa2, and Ab.
Excerpted from Wikipedia’s “Iota Orionis” article, available under the CC BY-SA 4.0 licence.