58 Eridani
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Eridanus |
| Right ascension | 04h 47m 36.29171s[2] |
| Declination | –16° 56′ 04.04-4″[2] |
| Apparent magnitude (V) | 5.47 - 5.51[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G1.5 V CH-0.5[4] |
| U−B color index | +0.13[5] |
| B−V color index | +0.64[5] |
| Variable type | BY Dra[3] |
| Astrometry | |
| Radial velocity (Rv) | 21.60±0.12[2] km/s |
| Proper motion (μ) | RA: +130.264[2] mas/yr Dec.: +169.338[2] mas/yr |
| Parallax (π) | 75.5289 ± 0.0539 mas[2] |
| Distance | 43.18 ± 0.03 ly (13.240 ± 0.009 pc) |
| Absolute magnitude (MV) | 4.87[6] |
| Details | |
| Mass | 1.053±0.007[7] M☉ |
| Radius | 1.00[2] R☉ |
| Luminosity | 0.97±0.05[2] L☉ |
| Surface gravity (log g) | 4.50±0.02[8] cgs |
| Temperature | 5,820±5.7[9] K |
| Metallicity [Fe/H] | 0.030±0.007[8] dex |
| Rotation | 7.6 days[10] |
| Rotational velocity (v sin i) | 3.37±0.11[8] km/s |
| Age | 600[11] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
58 Eridani is a main-sequence star in the constellation Eridanus. It is a solar analogue,[12] having similar physical properties to the Sun. The star has a relatively high proper motion across the sky, and it is located 43 light years distant. It is a probable member of the IC 2391 moving group of stars that share a common motion through space.[10]
Characteristics
[edit]This is a BY Draconis variable with the designation IX Eridani, which ranges in magnitude from 5.47 down to 5.51 with a period of 11.3 days.[3] The X-ray emissions from this star's corona indicate an age of less than a billion (109) years,[13] 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.[14]
See also
[edit]References
[edit]- ^ "/ftp/cats/more/HIP/cdroms/cats". Centre de Données astronomiques de Strasbourg. Strasbourg astronomical Data Center. Retrieved 15 October 2022.
- ^ a b c d e f g h i Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
- ^ 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, S2CID 119476992.
- ^ a b 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.
- ^ Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics", Astronomy and Astrophysics, 501 (3): 941–947, arXiv:0811.3982, Bibcode:2009A&A...501..941H, doi:10.1051/0004-6361/200811191, S2CID 118577511.
- ^ 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, S2CID 46964342, A48.
- ^ a b c dos Santos, Leonardo A.; et al. (August 2016), "The Solar Twin Planet Search. IV. The Sun as a typical rotator and evidence for a new rotational braking law for Sun-like stars", Astronomy & Astrophysics, 592: 8, arXiv:1606.06214, Bibcode:2016A&A...592A.156D, doi:10.1051/0004-6361/201628558, S2CID 53533614, A156.
- ^ 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, S2CID 18478960
- ^ a b 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, S2CID 119209183
- ^ 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, S2CID 27151456
- ^ 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:2002NewA....7..211G. doi:10.1016/S1384-1076(02)00108-2. S2CID 40662059.
- ^ 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. arXiv:astro-ph/0307398. Bibcode:1999JRASC..93..122F. doi:10.1016/j.newast.2003.07.002. S2CID 118954190.
External links
[edit]- "58 Eridani". SolStation. Archived from the original on 26 June 2006. Retrieved 2006-07-28.
- "Gl 177". ARICNS. 2006-06-06. Archived from the original on March 2, 2004. Retrieved 2015-12-28.
