| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 03 30 37.05823 |
| Declination | −05° 04′ 30.5239″ |
| Apparent magnitude (V) | 4.74 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | B9 III or B9Vs |
| B−V color index | −0.092±0.008 |
| Astrometry | |
| Radial velocity (Rv) | +15.0±4.2 km/s |
| Proper motion (μ) | RA: 14.23 mas/yr Dec.: 7.27 mas/yr |
| Parallax (π) | 8.07 ± 0.20 mas |
| Distance | 400 ± 10 ly (124 ± 3 pc) |
| Absolute magnitude (MV) | −0.72 |
| Details | |
| Mass | 3.55±0.04 M☉ |
| Radius | 3.2 R☉ |
| Luminosity | 267.9+15.2 −14.4 L☉ |
| Surface gravity (log g) | 3.603±0.017 cgs |
| Temperature | 11,143±51 K |
| Rotational velocity (v sin i) | 86 km/s |
| Age | 178+10 −9 Myr |
| Other designations | |
| v Eri, 17 Eri, BD−05°674, HD 21790, HIP 16341, HR 1070, SAO 130528 | |
| Database references | |
| SIMBAD | data |
17 Eridani is a single star in the equatorial constellation of Eridanus. It has the Bayer designation v Eridani (not to be confused with ν (nu) Eri), while 17 Eridani is the Flamsteed designation. This object is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.74. It is moving further from the Earth with a heliocentric radial velocity of around +15 km/s.
Houk and Swift (1999) found a stellar classification of B9 III for this star, while Cowley et al. (1969) show B9 Vs. Stellar models suggest this is a main-sequence star, which indicates it is generating energy through hydrogen fusion at its core. It is about 178 million years old with 3.55 times the mass of the Sun and around 3.2 times the size of the Sun. The star is radiating 268 times the Sun's luminosity from its photosphere at an effective temperature of 11,143 K. These coordinates are a source for X-ray emission, which may be coming from an unresolved companion.
References
- ^ 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, S2CID 18759600.
- ^ 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, S2CID 119257644.
- ^ Zorec, J.; et al. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy and Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
- ^ Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, 5, Bibcode:1999MSS...C05....0H.
- ^ Cowley, A.; et al. (April 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.
- ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (2) (Third ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
- ^ Huang, Wenjin; et al. (October 2010), "A Stellar Rotation Census of B Stars: From ZAMS to TAMS", The Astrophysical Journal, 722 (1): 605–619, arXiv:1008.1761, Bibcode:2010ApJ...722..605H, doi:10.1088/0004-637X/722/1/605, S2CID 118532653.
- ^ Hubrig, S.; et al. (June 2001), "Search for low-mass PMS companions around X-ray selected late B stars", Astronomy and Astrophysics, 372: 152–164, arXiv:astro-ph/0103201, Bibcode:2001A&A...372..152H, doi:10.1051/0004-6361:20010452, S2CID 17507782.
- "17 Eri". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-05-27.
- Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
