HD 17925
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 02h 52m 32.13s[1] |
| Declination | –12° 46′ 11.0″[1] |
| Apparent magnitude (V) | 6.04 |
| Characteristics | |
| Spectral type | K1 V |
| U−B color index | 0.57 |
| B−V color index | 0.86 |
| V−R color index | 0.48 |
| R−I color index | 0.41 |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | +18.4 km/s |
| Proper motion (μ) | RA: 397.41 ± 0.45[1] mas/yr Dec.: -189.32 ± 0.36[1] mas/yr |
| Parallax (π) | 96.60 ± 0.40[1] mas |
| Distance | 33.8 ± 0.1 ly (10.35 ± 0.04 pc) |
| Absolute magnitude (MV) | 6.04 |
| Details | |
| Temperature | 5225 ± 5.0[2] K |
| Metallicity [Fe/H] | +0.10[3] dex |
| Rotation | 6.6 days[3] |
| Age | 100[4] Myr |
| Other designations | |
32 G. Eridani, GJ 117, BD-13°544, HR 857, HIP 13402, YPC 599 | |
HD 17925 (32 G. Eridani) is a solitary K-type main sequence star located thirty-four light-years away, in the constellation Eridanus. It is a likely member of the Local Association of nearby, co-moving stars.[3]
An infrared excess has been detected around this star, most likely indicating the presence of a circumstellar disk at a radius of 17.9 AU. The temperature of this dust is 52 K.[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007), "HIP 13402", Hipparcos, the New Reduction, retrieved 2009-12-11
- ↑ Kovtyukh et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics 411 (3): 559–564, arXiv:astro-ph/0308429, Bibcode:2003A&A...411..559K, doi:10.1051/0004-6361:20031378
- ↑ 3.0 3.1 3.2 Maldonado, J. et al. (October 2010), "A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups", Astronomy and Astrophysics 521: A12, arXiv:1007.1132, Bibcode:2010A&A...521A..12M, doi:10.1051/0004-6361/201014948
- ↑ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008), "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics", The Astrophysical Journal 687 (2): 1264–1293, arXiv:0807.1686, Bibcode:2008ApJ...687.1264M, doi:10.1086/591785
- ↑ Eiroa, C. et al. (July 2013). "DUst around NEarby Stars. The survey observational results". Astronomy & Astrophysics 555: A11. arXiv:1305.0155. Bibcode:2013A&A...555A..11E. doi:10.1051/0004-6361/201321050.
External links
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