Back Gliese 644 AST Gliese 644 Catalan Gliese 644 Spanish V1054 Ophiuchi Dutch V1054 Ophiuchi Swedish 蛇夫座 V1054 Chinese
 An ultraviolet band light curve for a flare on V1054 Ophiuchi, plotted from data published by Dal and Evren (2010)[1] | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 16h 55m 25.2222456607s[2] |
| Declination | −08° 19′ 21.296969682″[2] |
| Apparent magnitude (V) | 9.74/10.34/10.84/11.74/16.80[3] |
| Characteristics | |
| Spectral type | M3 V[4] / M4 Ve[note 1] / M3.5 V[4] / M7.0 V[3] |
| Astrometry | |
| Proper motion (μ) | RA: −817.580±0.052[2] mas/yr Dec.: −898.595±0.040[2] mas/yr |
| Parallax (π) | 153.8754 ± 0.0474 mas[2] |
| Distance | 21.196 ± 0.007 ly (6.499 ± 0.002 pc) |
| Absolute magnitude (MV) | 10.69±0.02 / 11.29±0.05 / 11.79±0.05 / 12.69[3][note 2] |
| VB 8 | |
| Proper motion (μ) | RA: −813.038±0.063[5] mas/yr Dec.: −870.609±0.044[5] mas/yr |
| Parallax (π) | 153.9659 ± 0.0570 mas[5] |
| Distance | 21.184 ± 0.008 ly (6.495 ± 0.002 pc) |
| Absolute magnitude (MV) | 17.75[3] |
| Orbit[4] | |
| Primary | V1054 Oph A |
| Companion | V1054 Oph B |
| Period (P) | 1.717267±0.000039[3] yr |
| Semi-major axis (a) | 0.2273±0.0004" (1.46683 AU[note 3]) |
| Eccentricity (e) | 0.042±0.001 |
| Inclination (i) | 160.3±0.1° |
| Longitude of the node (Ω) | −10.2±0.2° |
| Periastron epoch (T) | MJD 53943±3 |
| Argument of periastron (ω) (secondary) | 306.0±1.5° |
| Orbit[4] | |
| Primary | V1054 Oph Ba |
| Companion | V1054 Oph Bb |
| Period (P) | 2.965509±0.000006 d |
| Semi-major axis (a) | 0.00687[note 4]" (0.04432 AU[note 5]) |
| Eccentricity (e) | 0.0209±0.0008 |
| Inclination (i) | 164.18±0.08° |
| Periastron epoch (T) | MJD 50919.48±0.03 |
| Argument of periastron (ω) (secondary) | 150.0±3.0° |
| Details | |
| V1054 Oph AB | |
| Mass | 0.4155±0.0057 / 0.3466±0.0047 / 0.3143±0.0040[4] M☉ |
| Gliese 643 | |
| Mass | 0.19[3] M☉ |
| Details | |
| VB 8 | |
| Mass | 0.0914+0.0026 −0.0025[6] M☉ |
| Radius | 0.1214+0.0060 −0.0057[6] R☉ |
| Luminosity | 0.000645+0.000004 −0.000005[6] L☉ |
| Temperature | 2,640+65 −64[6] K |
| Other designations | |
| Database references | |
| SIMBAD | The system |
| ABab | |
| A | |
| Bab | |
| GJ 643 | |
| C (vB 8) | |
| vB 8B (artifact) | |
V1054 Ophiuchi, together with the star Gliese 643, is a nearby quintuple star system. In the constellation Ophiuchus at a distance of 21.19 light-years. It consists of five stars, all of which are red dwarfs. The alternative designation of Wolf 630 forms the namesake of a moving group of stars that share a similar motion through space.[8]
- ^ Cite error: The named reference
Dal2010was invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
GaiaEDR3was invoked but never defined (see the help page). - ^ a b c d e f Cite error: The named reference
Mazeh2001was invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
Ségransan2000was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
GaiaEDR3-VB8was invoked but never defined (see the help page). - ^ a b c d Cite error: The named reference
Pineda2021was invoked but never defined (see the help page). - ^ "HD 152751". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-03-25.
- ^ Bubar, Eric J.; King, Jeremy R. (August 2010). "Spectroscopic Abundances and Membership in the Wolf 630 Moving Group". The Astronomical Journal. 140 (2): 293–318. arXiv:1005.1205. Bibcode:2010AJ....140..293B. doi:10.1088/0004-6256/140/2/293. S2CID 118455341.
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