Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ophiuchus |
Right ascension | 17h 37m 50.71308s [1] |
Declination | −8° 07′ 07.5749″ [1] |
Apparent magnitude (V) | 4.62 [2] |
Characteristics | |
Spectral type | B8II-IIIp:Mn [3] |
U−B color index | −0.20 [2] |
B−V color index | +0.11 [2] |
Astrometry | |
Radial velocity (Rv) | −18.50 [4] km/s |
Proper motion (μ) |
RA: −11.31
[5]
mas/
yr Dec.: −20.47 [5] mas/ yr |
Parallax (π) | 4.32 ± 0.20 mas [5] |
Distance | 750 ± 30
ly (230 ± 10 pc) |
Absolute magnitude (MV) | -2.24 [6] |
Details | |
Radius | 11.1+2.1 −0.6 [1] R☉ |
Luminosity | 398.7±26.8 [1] L☉ |
Temperature | 7,748+210 −651 [1] K |
Metallicity [Fe/H] | +0.00 [7] dex |
Rotational velocity (v sin i) | 95 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
μ Ophiuchi, Latinized as Mu Ophiuchi, is a solitary, [10] blue-white hued star in the equatorial constellation of Ophiuchus. It is visible to the naked as a faint point of light with an apparent visual magnitude of 4.62. [2] This object is located approximately 760 light years away from the Sun based on parallax, [5] but is drifting closer with a radial velocity of −18.5 km/s. [4]
This object has a stellar classification of B8II-IIIp:Mn, [3] showing a luminosity class with mixed traits of a giant or bright giant star. The suffix notation indicates it is a candidate chemically peculiar star with an overabundance of manganese in its spectrum. It may be a mercury-manganese star. [11] This object has 11 times the radius of the Sun and is radiating nearly 400 times the Sun's luminosity from its photosphere at an effective temperature of 7,748 K. [1] It is spinning with a projected rotational velocity of 95 km/s. [8]
In 2006, a new nearby star cluster, Mamajek 2 ( /ˈmæmədʒɛk/), was discovered. Mu Ophiuchi is a candidate member. [12] The cluster has an estimated age of 120±25 million years. [13]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ophiuchus |
Right ascension | 17h 37m 50.71308s [1] |
Declination | −8° 07′ 07.5749″ [1] |
Apparent magnitude (V) | 4.62 [2] |
Characteristics | |
Spectral type | B8II-IIIp:Mn [3] |
U−B color index | −0.20 [2] |
B−V color index | +0.11 [2] |
Astrometry | |
Radial velocity (Rv) | −18.50 [4] km/s |
Proper motion (μ) |
RA: −11.31
[5]
mas/
yr Dec.: −20.47 [5] mas/ yr |
Parallax (π) | 4.32 ± 0.20 mas [5] |
Distance | 750 ± 30
ly (230 ± 10 pc) |
Absolute magnitude (MV) | -2.24 [6] |
Details | |
Radius | 11.1+2.1 −0.6 [1] R☉ |
Luminosity | 398.7±26.8 [1] L☉ |
Temperature | 7,748+210 −651 [1] K |
Metallicity [Fe/H] | +0.00 [7] dex |
Rotational velocity (v sin i) | 95 [8] km/s |
Other designations | |
Database references | |
SIMBAD | data |
μ Ophiuchi, Latinized as Mu Ophiuchi, is a solitary, [10] blue-white hued star in the equatorial constellation of Ophiuchus. It is visible to the naked as a faint point of light with an apparent visual magnitude of 4.62. [2] This object is located approximately 760 light years away from the Sun based on parallax, [5] but is drifting closer with a radial velocity of −18.5 km/s. [4]
This object has a stellar classification of B8II-IIIp:Mn, [3] showing a luminosity class with mixed traits of a giant or bright giant star. The suffix notation indicates it is a candidate chemically peculiar star with an overabundance of manganese in its spectrum. It may be a mercury-manganese star. [11] This object has 11 times the radius of the Sun and is radiating nearly 400 times the Sun's luminosity from its photosphere at an effective temperature of 7,748 K. [1] It is spinning with a projected rotational velocity of 95 km/s. [8]
In 2006, a new nearby star cluster, Mamajek 2 ( /ˈmæmədʒɛk/), was discovered. Mu Ophiuchi is a candidate member. [12] The cluster has an estimated age of 120±25 million years. [13]