Nu Hydri

ν Hydri
Location of ν Hydri (circled)
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
Distance339 ± 6 ly
(104 ± 2 pc)
Absolute magnitude (MV)-0.33[2]
Details
Mass3.5[5] M☉
Radius17.2[5] R☉
Luminosity241[2] L☉
Surface gravity (log g)3.30[6] cgs
Temperature4,428[7] K
Metallicity [Fe/H]−1.52[6] dex
Rotation50 d[5]
Rotational velocity (v sin i)1.3[8] km/s
Other designations
CPD−75° 204, FK5 2199, GC 3463, HIP 13244, HR 872, HD 18293, SAO 255929
Database references
SIMBADdata

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. 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
  2. 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
  3. 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
  4. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065.
  5. 1 2 3 Gondoin, P. (December 2005), "The relation between X-ray activity and rotation in intermediate-mass G giants", Astronomy and Astrophysics, 444 (2): 531–538, Bibcode:2005A&A...444..531G, doi:10.1051/0004-6361:20053567.
  6. 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.
  7. ↑ 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. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. Vizier catalog entry
  8. ↑ 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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