58 Eridani
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 47m 36.29148s[1] |
| Declination | –16° 56′ 04.0413″[1] |
| Apparent magnitude (V) | 5.49[2] |
| Characteristics | |
| Spectral type | G1.5 V CH-0.5[3] |
| U−B color index | +0.13[2] |
| B−V color index | +0.64[2] |
| Variable type | BY Dra |
| Astrometry | |
| Radial velocity (Rv) | 23.00 ± 0.56[4] km/s |
| Proper motion (μ) | RA: 130.04 ± 0.37[1] mas/yr Dec.: 169.27 ± 0.28[1] mas/yr |
| Parallax (π) | 75.32 ± 0.36 mas[1] |
| Distance | 43.3 ± 0.2 ly (13.28 ± 0.06 pc) |
| Details | |
| Mass | 1.053 ± 0.007[5] M☉ |
| Temperature | 5,820 ± 5.7[6] K |
| Metallicity [Fe/H] | 0.00[7] dex |
| Rotation | 7.6 days[7] |
| Age | 600[8] Myr |
| Other designations | |
58 Eridani is a main-sequence star in the constellation Eridanus. It is considered a solar analogue,[9] which means it has similar physical properties to the Sun. The star has a relatively high proper motion across the sky, and it is located about 43 light years distant. It is a probable member of the IC 2391 moving group of stars that share a common motion through space.[7]
The X-ray emissions from this star's corona indicate an age of less than a billion (109) years,[10] compared to 4.6 billion for the Sun, so it is still relatively young for a star of its mass. Starspot activity has also been detected, which varies from year to year.
A circumstellar disc of dust particles has been detected in orbit around 58 Eridani.[11]
See also
References
- ^ a b c d e van Leeuwen, F. (November 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.
- ^ a b c Cousins, A. W. J. (1973), "UBV photometry of some southern stars", Monthly Notes of the Astronomical Society of Southern Africa, 32: 11, Bibcode:1973MNSSA..32...11C.
- ^ 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.
- ^ Valenti, Jeff A.; Fischer, Debra A. (July 2005), "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs", The Astrophysical Journal Supplement Series, 159 (1): 141–166, Bibcode:2005ApJS..159..141V, doi:10.1086/430500.
- ^ Ramírez, I.; et al. (December 2014), "The Solar Twin Planet Search. I. Fundamental parameters of the stellar sample", Astronomy & Astrophysics, 572: 19, arXiv:1408.4130, Bibcode:2014A&A...572A..48R, doi:10.1051/0004-6361/201424244, A48.
- ^ 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
- ^ a b c 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
- ^ E.J. Gaidos; G.W. Henry; S.M. Henry (2000). "Spectroscopy and Photometry of Nearby Young Solar Analogs". Astronomical Journal. 120 (2): 1006–1013. Bibcode:2000AJ....120.1006G. doi:10.1086/301488.
- ^ E.J. Gaidos; G. Gonzalez (2002). "Stellar Atmospheres of Nearby Young Solar Analogs". New Astronomy. 7 (5): 211–226. arXiv:astro-ph/0203518. Bibcode:2002astro.ph..3518G. doi:10.1016/S1384-1076(02)00108-2.
- ^ E. Gaidos; C. Koresko (2004). "A Survey of 10-Micron Silicate Emission from Dust around Young Sun-Like Stars". New Astronomy. 93 (1): 33–42. Bibcode:1999JRASC..93..122F. doi:10.1016/j.newast.2003.07.002.
External links
- "58 Eridani". SolStation. Archived from the original on 26 June 2006. Retrieved 2006-07-28.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - "Gl 177". ARICNS. 2006-06-06. Archived from the original on March 2, 2004. Retrieved 2015-12-28.
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