Eta Indi

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η Indi
Indus constellation map.svg
Red circle.svg

Location of η Indi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Indus
Right ascension 20h 44m 02.33404s[1]
Declination −51° 55′ 15.4970″[1]
Apparent magnitude (V) 4.52[2]
Spectral type A9IV[3]
B−V color index +0.26[2]
Radial velocity (Rv) -1.60[4] km/s
Proper motion (μ) RA: +155.80[1] mas/yr
Dec.: -53.86[1] mas/yr
Parallax (π) 41.37 ± 0.25[1] mas
Distance 78.8 ± 0.5 ly
(24.2 ± 0.1 pc)
Absolute magnitude (MV) 2.59[5]
Mass 1.60[6] M
Luminosity 7.60[5] L
Temperature 7,694[6] K
Other designations
FK5 776, GC 28860, HIP 102333, HR 7920, HD 197157, SAO 246709 [2]
Database references

Eta Indi (η Ind) is a class A9IV[3] (white subgiant) star in the constellation Indus. Its apparent magnitude is 4.52[2] and it is approximately 78.8 light years away based on parallax.[1]


  1. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752free to read. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d "Eta Indi". SIMBAD Astronomical Database. Retrieved 2016-08-23. 
  3. ^ a b Gray, R. O.; et al. (July 2006). "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770free to read. Bibcode:2006AJ....132..161G. doi:10.1086/504637. 
  4. ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  5. ^ a b Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971free to read. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.  Vizier catalog entry
  6. ^ a b David, Trevor J.; Hillenbrand, Lynne A. (May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146–184. arXiv:1501.03154free to read. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146.  Vizier catalog entry