70 Cancri
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Cancer |
Right ascension | 09h 04m 09.86833s[1] |
Declination | +27° 53′ 53.8989″[1] |
Apparent magnitude (V) | 6.665[2] |
Characteristics | |
Spectral type | A1V[3] |
U−B color index | +0.05[4] |
B−V color index | +0.00[4] |
Astrometry | |
Radial velocity (Rv) | -21.00 ± 4.4[5] km/s |
Proper motion (μ) | RA: 0.67[1] mas/yr Dec.: -1.78[1] mas/yr |
Parallax (π) | 5.12 ± 0.49[1] mas |
Distance | 640 ± 60 ly (200 ± 20 pc) |
Details | |
Radius | 2.7[6] R☉ |
Other designations | |
Database references | |
SIMBAD | data |
70 Cancri (70 Cnc) is a star in the constellation Cancer. Its apparent magnitude is 6.665,[2] and it is an A-type main-sequence star[3] with a radius of about 2.7 R☉.[6]
References
- 1 2 3 4 5 van Leeuwen, F.; et al. (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.
- 1 2 Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H.
- 1 2 Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (1969). "A study of the bright A stars. I. A catalogue of spectral classifications". Astronomical Journal. 74: 375–406. Bibcode:1969AJ.....74..375C. doi:10.1086/110819.
- 1 2 Osawa, Kiyoteru (1959). "Spectral Classification of 533 B8-A2 Stars and the Mean Absolute Magnitude of A0 V Stars". Astrophysical Journal. 130: 159. Bibcode:1959ApJ...130..159O. doi:10.1086/146706.
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 Pasinetti Fracassini, L. E.; et al. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy & Astrophysics. 367: 521–24. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451.
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