Nu Hydri
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Hydrus |
Right ascension | 02h 50m 28.46194s[1] |
Declination | −75° 04′ 01.0107″[1] |
Apparent magnitude (V) | 4.76[2] |
Characteristics | |
Spectral type | K3III[2] |
U−B color index | +1.56[3] |
B−V color index | +1.33[3] |
Astrometry | |
Radial velocity (Rv) | +4.70[4] km/s |
Proper motion (μ) | RA: -33.01[1] mas/yr Dec.: -27.30[1] mas/yr |
Parallax (π) | 9.61 ± 0.16[1] mas |
Distance | 339 ± 6 ly (104 ± 2 pc) |
Absolute magnitude (MV) | -0.33[2] |
Details | |
Luminosity | 241[2] L☉ |
Surface gravity (log g) | 3.30[5] cgs |
Temperature | 4,428[6] K |
Metallicity [Fe/H] | -1.52[5] dex |
Rotational velocity (v sin i) | 1.3[7] km/s |
Other designations | |
Database references | |
SIMBAD | data |
Nu Hydri (ν Hyi) is a class K3III[2] (orange giant) star in the constellation Hydrus. Its apparent magnitude is 4.76[2] and it is approximately 339 light years away based on parallax.[1]
References
- 1 2 3 4 5 6 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- 1 2 3 4 5 6 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. Vizier catalog entry
- 1 2 Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M.Vizier catalog entry
- ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
- 1 2 Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497.
- ↑ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427: 343. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. Vizier catalog entry
- ↑ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. Vizier catalog entry
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