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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.

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
Distance290 ± 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
Distanceapprox. 320 ly
(approx. 100 pc)
Other designations
39 Ophiuchi, CD−24° 13255, CCDM J17180-2417, WDS J17180-2417
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
SIMBADAB
A
B

ReferencesEdit

  1. ^ a b c d "omi Oph A". SIMBAD. Centre de données astronomiques de Strasbourg.
  2. ^ a b c d "omi Oph B". SIMBAD. Centre de données astronomiques de Strasbourg.
  3. ^ a b c d Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Bibcode:1986EgUBV........0M.
  4. ^ a b 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.
  5. ^ a b c d e f 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