Omicron Ophiuchi

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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
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
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[edit]