Omega2 Scorpii
| Observation data J2000.0
| |
|---|---|
| Constellation | Scorpius
|
| Right ascension | 16h 07m 24.32818s[1] |
| Declination | −20° 52′ 07.5518″[1] |
| Apparent magnitude (V) | +4.320[2] |
| Characteristics | |
| Evolutionary stage | horizontal branch[3] |
| Spectral type | G6/8III[4] |
| U−B color index | +0.494[2] |
| B−V color index | +0.850[2] |
| Absolute magnitude (MV) | −0.62[6] |
| Details | |
Myr | |
SAO 184135[10] | |
| Database references | |
| SIMBAD | data |
ω2 Scorpii, Latinised as Omega2 Scorpii, is a suspectedlight years. The visual magnitude of this star is reduced by 0.38 because of extinction from interstellar dust.[6]
It is 0.05 degree north of the ecliptic, so can be occulted by the moon and planets.
This is a
mas,[12] which, at its estimated distance, equates to a physical radius of nearly 16 times the radius of the Sun.[13] It has 3.27 times the mass of the Sun,[6] and radiates 141 times the Sun's luminosity[14] The effective temperature of the star's outer atmosphere is 5,363 K.[8]
Names
In the
traditional story is told of twins who flee their parents into the sky and become the pair of stars Omega2 and Omega1 Scorpii. The girl, who is called Piri-ere-ua "Inseparable", keeps tight hold of her brother, who is not named.[15] (The IAU used a version of this story from Tahiti to name Mu2 Scorpii
.)
References
- ^ S2CID 18759600.
- ^ Bibcode:1985A&AS...61..387K.
- ^ S2CID 119249237, 20.
- ^ Bibcode:1988mcts.book.....H.
- Bibcode:1953GCRV..C......0W.
- ^ S2CID 16258166.
- ^ .
- ^ S2CID 54940439.
- ISBN 0-486-21079-0.
- ^ "* ome02 Sco". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-09-25.
- Bibcode:1977IBVS.1230....1S.
- .
- ISBN 3-540-29692-1.. The radius (R*) is given by:
- S2CID 118665352.
- ^ Johannes Carl Andersen (1931) Myths and Legends of the Polynesians. 1995 Dover reprint, p.399–400.
External links
- Kaler, James B. (September 9, 2016), "Omega-1 and Omega-2 Scorpii", Stars, University of Illinois, retrieved 2016-09-26.