Nu Pictoris
| |
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Pictor |
Right ascension | 06h 22m 55.82671s[1] |
Declination | −56° 22′ 11.8909″[1] |
Apparent magnitude (V) | 5.609[2] |
Characteristics | |
Spectral type | A1m[2] |
U−B color index | 0.12[3] |
B−V color index | 0.26[3] |
Astrometry | |
Radial velocity (Rv) | 6.7[2] km/s |
Proper motion (μ) | RA: -39.96[1] mas/yr Dec.: -20.13[1] mas/yr |
Parallax (π) | 20.72 ± 0.56[1] mas |
Distance | 157 ± 4 ly (48 ± 1 pc) |
Absolute magnitude (MV) | 2.19 |
Orbit[4] | |
Primary | Nu Pictoris A |
Companion | Nu Pictoris B |
Period (P) | 452 days |
Semi-major axis (a) | 5.9 mas |
Eccentricity (e) | 0.2 |
Inclination (i) | 116° |
Longitude of the node (Ω) | 53° |
Periastron epoch (T) | 2448660 |
Argument of periastron (ω) (secondary) | 109° |
Other designations | |
Database references | |
SIMBAD | data |
Nu Pictoris (ν Pictoris) is a star in the Pictor constellation. Parallax measurements put it about 157 light years from Earth. It is an A-class star with metallic lines (Am type).[2]
Data from the Hipparcos observatory indicate that it is an astrometric binary with period around 440 days and the companion about 1/4 the mass of the primary.[5]
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 . doi:10.1051/0004-6361:20078357. Vizier catalog entry
- 1 2 3 4 "nu. Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 December 2016.
- 1 2 Feinstein, A. (1974). "Photoelectric UBVRI observations of AM stars". Astronomical Journal. 79: 1290. Bibcode:1974AJ.....79.1290F. doi:10.1086/111675.
- ↑ Goldin, A. (2007). "Astrometric Orbits for Hipparcos Stochastic Binaries". The Astrophysical Journal Supplement Series. 173 (1): 137–142. Bibcode:2007ApJS..173..137G. arXiv:0706.0361 . doi:10.1086/520513.
- ↑ Goldin, A.; Makarov, V. V (September 2006). "Unconstrained Astrometric Orbits for Hipparcos Stars with Stochastic Solutions". The Astrophysical Journal Supplement Series. 166 (1): 341–350. Bibcode:2006ApJS..166..341G. arXiv:astro-ph/0606293 . doi:10.1086/505939.
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