Eta Indi
 
| |
| 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] |
| Characteristics | |
| Spectral type | A9IV[3] |
| B−V color index | +0.26[2] |
| Astrometry | |
| 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] |
| Details | |
| Mass | 1.60[6] M☉ |
| Luminosity | 7.60[5] L☉ |
| Temperature | 7,694[6] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
References
- 1 2 3 4 5 6 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. Vizier catalog entry - 1 2 3 4 "Eta Indi". SIMBAD Astronomical Database. Retrieved 2016-08-23.
- 1 2 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/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637.
- ↑ 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.
- 1 2 Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. Vizier catalog entry
- 1 2 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:1501.03154. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146. Vizier catalog entry
This article is issued from Wikipedia - version of the 8/23/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.