Nu Pictoris

Nu Pictoris
Diagram showing star positions and boundaries of the Pictor constellation and its surroundings
Location of ν Pictoris (circled)
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
Distance157 ± 4 ly
(48 ± 1 pc)
Absolute magnitude (MV)+2.18[4]
Orbit[5]
PrimaryNu Pictoris A
CompanionNu 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
ν Pic, CPD-56° 1072, HD 45229, HIP 30342, SAO 234473, HR 2320, GC 8274, TYC 8542-1469-1
Database references
SIMBADdata

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.[6]

References

  1. 1 2 3 4 5 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
  2. 1 2 3 4 "nu. Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 28 December 2016.
  3. 1 2 Feinstein, A. (1974). "Photoelectric UBVRI observations of AM stars". Astronomical Journal. 79: 1290. Bibcode:1974AJ.....79.1290F. doi:10.1086/111675.
  4. ↑ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
  5. ↑ Goldin, A. (2007). "Astrometric Orbits for Hipparcos Stochastic Binaries". The Astrophysical Journal Supplement Series. 173 (1): 137–142. arXiv:0706.0361. Bibcode:2007ApJS..173..137G. doi:10.1086/520513.
  6. ↑ 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. arXiv:astro-ph/0606293. Bibcode:2006ApJS..166..341G. doi:10.1086/505939.


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