Omicron1 Orionis
  | |
| Observation data ICRS )
| |
|---|---|
| Constellation | Orion |
| Right ascension | 04h 52m 31.96357s[1] |
| Declination | +14° 15′ 02.3215″[1] |
| Apparent magnitude (V) | 4.65 - 4.88[2] |
| Characteristics | |
| Spectral type | M3S III[3] |
| U−B color index | +2.03[4] |
| B−V color index | +1.74[4] |
| Variable type | SRb[2]
|
| Details | |
dex | |
HR 1556, SAO 94176 | |
| Database references | |
| SIMBAD | data |
Omicron1 Orionis (ο1 Ori) is a
light years from the Sun. At that distance, the visual magnitude of the star is diminished by an interstellar absorption factor of 0.27 due to intervening dust.[5]
The two components of this system have an orbital period of greater than 1,900 days (5.2 years).semiregular variable[11] that is pulsating with periods of 30.8 and 70.7 days, each with nearly identical amplitudes of 0.05 in magnitude.[12] The star has an estimated 90% of the mass of the Sun but has expanded to 214 times the Sun's radius.[6] It shines with 4,046[7] times the solar luminosity from its outer atmosphere at an effective temperature of 3,465 K.[8]
References
- ^ S2CID 18759600.
- ^ Bibcode:2009yCat....102025S.
- ^ S2CID 56041336, A35.
- ^ Bibcode:1986EgUBV........0M.
- ^ S2CID 17804304.
- ^ S2CID 49573767.
- ^ S2CID 118665352.
- ^ S2CID 54940439.
- ^ S2CID 16326384.
- ^ "/ftp/cats/more/HIP/cdroms/cats". Centre de Données astronomiques de Strasbourg. Strasbourg astronomical Data Center. Retrieved 15 October 2022.
- S2CID 14332208.
- S2CID 15358380.