Omicron Ophiuchi
Observation data Epoch 2000 Equinox 2000 | |
---|---|
Constellation | Ophiuchus |
ο Oph A | |
Right ascension | 17h 18m 00.68071s[1] |
Declination | −24° 17′ 12.8612″[1] |
Apparent magnitude (V) | 5.20[1] |
ο Oph B | |
Right ascension | 17h 18m 00.60413s[2] |
Declination | −24° 17′ 02.7739″[2] |
Apparent magnitude (V) | 6.80[2] |
Characteristics | |
ο Oph A | |
Spectral type | G8III[1] |
U−B color index | 0.98[3] |
B−V color index | 0.97[3] |
ο Oph B | |
Spectral type | F6IV-V[2] |
U−B color index | 0.05[3] |
B−V color index | 0.51[3] |
Astrometry | |
ο Oph A | |
Radial velocity (Rv) | -29.90[4] km/s |
Proper motion (μ) | RA: -56.50[5] mas/yr Dec.: -9.39[5] mas/yr |
Parallax (π) | 11.06 ± 1.09[5] mas |
Distance | 290 ± 30 ly (90 ± 9 pc) |
ο Oph A | |
Radial velocity (Rv) | -29.70[4] km/s |
Proper motion (μ) | RA: -56.50[5] mas/yr Dec.: -9.39[5] mas/yr |
Parallax (π) | 10.18 ± 1.09[5] mas |
Distance | approx. 320 ly (approx. 100 pc) |
Other designations | |
ο Oph A: HR 6424, HD 156349, HIP 84626, SAO 185238, GC 23344 | |
ο Oph B: HR 6425, HD 156350, HIP 84625, SAO 185237, GC 23343 | |
Database references | |
SIMBAD | AB |
A | |
B |
Omicron Ophiuchi (ο Oph) is a double star in the constellation Ophiuchus. The apparent magnitudes of its two components are 5.20 and 6.80.
References
- 1 2 3 4 "omi Oph A". SIMBAD. Centre de données astronomiques de Strasbourg.
- 1 2 3 4 "omi Oph B". SIMBAD. Centre de données astronomiques de Strasbourg.
- 1 2 3 4 Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M.
- 1 2 Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. Retrieved 12 December 2016.
- 1 2 3 4 5 6 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
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