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Phi2 Cancri 
Summary
Phi2 Cancri (φ2 Cancri) is a binary star in the constellation Cancer, about 280 light-years from Earth. Both components are white A-type main-sequence dwarfs with apparent magnitudes of +6.3. They are separated by 5.126 arcseconds on the sky, and their mean apparent brightness is +5.55 magnitudes.[2]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Cancer |
| Right ascension | 08h 26m 47.06931s[1] |
| Declination | +26° 56′ 07.7515″[1] |
| Apparent magnitude (V) | +5.54 (6.26 + 6.31)[2] |
| Characteristics | |
| Spectral type | A6V + A3V[2] |
| Astrometry | |
| Proper motion (μ) | RA: −9.60[1] mas/yr Dec.: +0.21[1] mas/yr |
| Parallax (π) | 11.83 ± 0.71 mas[1] |
| Distance | 280 ± 20 ly (85 ± 5 pc) |
| Absolute magnitude (MV) | +2.65[3] |
| Details | |
| Luminosity | 9.1[3] L☉ |
| Metallicity [Fe/H] | −0.04±0.02[3] dex |
| Other designations | |
| φ2 Cnc A: HD 71151, HR 3311, SAO 80188 | |
| φ2 Cnc B: HD 71150, HR 3310, SAO 80187 | |
| Database references | |
| SIMBAD | φ2 Cnc A |
| φ2 Cnc B | |
References edit
- ^ a b c d e 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, S2CID 18759600.
- ^ a b c Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ a b c 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, S2CID 119257644.
- ^ "* phi02 Cnc". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-09.