Astronomy:58 Eridani
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Short description: Star in the constellation Eridanus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[2] mas |
| 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
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
References
- ↑ "/ftp/cats/more/HIP/cdroms/cats". Strasbourg astronomical Data Center. https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Samus, N. N. et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, 5.1 61 (1): 80–88, doi:10.1134/S1063772917010085, Bibcode: 2017ARep...61...80S.
- ↑ 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, doi:10.1086/504637, Bibcode: 2006AJ....132..161G.
- ↑ 5.0 5.1 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, doi:10.1051/0004-6361/200811191, Bibcode: 2009A&A...501..941H.
- ↑ Ramírez, I. et al. (December 2014), "The Solar Twin Planet Search. I. Fundamental parameters of the stellar sample", Astronomy & Astrophysics 572: 19, doi:10.1051/0004-6361/201424244, A48, Bibcode: 2014A&A...572A..48R.
- ↑ 8.0 8.1 8.2 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, doi:10.1051/0004-6361/201628558, A156, Bibcode: 2016A&A...592A.156D.
- ↑ Kovtyukh et al. (2003), "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios", Astronomy and Astrophysics 411 (3): 559–564, doi:10.1051/0004-6361:20031378, Bibcode: 2003A&A...411..559K
- ↑ 10.0 10.1 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, doi:10.1051/0004-6361/201014948, Bibcode: 2010A&A...521A..12M
- ↑ 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, doi:10.1086/591785, Bibcode: 2008ApJ...687.1264M
- ↑ E.J. Gaidos; G.W. Henry; S.M. Henry (2000). "Spectroscopy and Photometry of Nearby Young Solar Analogs". Astronomical Journal 120 (2): 1006–1013. doi:10.1086/301488. Bibcode: 2000AJ....120.1006G.
- ↑ E.J. Gaidos; G. Gonzalez (2002). "Stellar Atmospheres of Nearby Young Solar Analogs". New Astronomy 7 (5): 211–226. doi:10.1016/S1384-1076(02)00108-2. Bibcode: 2002NewA....7..211G.
- ↑ 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. doi:10.1016/j.newast.2003.07.002. Bibcode: 1999JRASC..93..122F.
External links
- "58 Eridani". SolStation. http://www.solstation.com/stars2/58eri.htm.
- "Gl 177". ARICNS. 2006-06-06. http://www.ari.uni-heidelberg.de/aricns/cnspages/4c00400.htm.
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