Observation data Epoch J1950.0 Equinox J1950.0 | |
---|---|
Constellation | Orion |
Right ascension | 05h 42m 09.26769s[1] |
Declination | +12° 29′ 21.6048″[1] |
Apparent magnitude (V) | +11.48 - 11.55[2] |
Characteristics | |
Evolutionary stage | red dwarf |
Spectral type | M4V[3] |
U−B color index | +14.264 |
B−V color index | +13.130 |
Variable type | BY Dra[2] |
Astrometry | |
Radial velocity (Rv) | 106.06±0.18[1] km/s |
Proper motion (μ) | RA: +1,997.342[1] mas/yr Dec.: −1569.63[1] mas/yr |
Parallax (π) | 172.6762 ± 0.0286 mas[1] |
Distance | 18.888 ± 0.003 ly (5.7912 ± 0.0010 pc) |
Absolute magnitude (MV) | +12.73[4] |
Details | |
Mass | 0.218±0.005[5] M☉ |
Radius | 0.238±0.009[5] R☉ |
Luminosity | 0.006288±0.000094[5] L☉ |
Surface gravity (log g) | 4.44[1] cgs |
Temperature | 3,334+67 −63[5] K |
Metallicity [Fe/H] | −0.19±0.17[6] dex |
Rotation | 170[7] |
Rotational velocity (v sin i) | 3.1[8] km/s |
Age | 7.1[9] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Location of Ross 47 in the constellation Orion |
Ross 47 is a variable star of spectral type M4 located in the constellation Orion, 19 light-years from Earth.
References
[edit]- ^ a b c d e f g 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 Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. GCVS 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
- ^ Kirkpatrick, J. Davy; Henry, Todd J.; McCarthy, Donald W. Jr. (1991). "A standard stellar spectral sequence in the red/near-infrared - Classes K5 to M9". Astrophysical Journal Supplement. 77: 417. Bibcode:1991ApJS...77..417K. doi:10.1086/191611.
- ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. eISSN 1562-6873. ISSN 1063-7737. S2CID 119257644.
- ^ a b c d Pineda, J. Sebastian; Youngblood, Allison; France, Kevin (September 2021). "The M-dwarf Ultraviolet Spectroscopic Sample. I. Determining Stellar Parameters for Field Stars". The Astrophysical Journal. 918 (1): 23. arXiv:2106.07656. Bibcode:2021ApJ...918...40P. doi:10.3847/1538-4357/ac0aea. S2CID 235435757. 40.
- ^ Antoniadis-Karnavas, A.; Sousa, S. G.; Delgado-Mena, E.; Santos, N. C.; Teixeira, G. D. C.; Neves, V. (2020), "ODUSSEAS: A machine learning tool to derive effective temperature and metallicity for M dwarf stars", Astronomy & Astrophysics, 636: A9, arXiv:2002.09367, Bibcode:2020A&A...636A...9A, doi:10.1051/0004-6361/201937194, S2CID 211252698
- ^ Astudillo-Defru, N.; Delfosse, X.; Bonfils, X.; Forveille, T.; Lovis, C.; Rameau, J. (2017). "Magnetic activity in the HARPS M dwarf sample. The rotation-activity relationship for very low-mass stars through R'HK". Astronomy and Astrophysics. 600: 600. arXiv:1610.09007. Bibcode:2017A&A...600A..13A. doi:10.1051/0004-6361/201527078. S2CID 119237202.
- ^ Hojjatpanah, S.; Oshagh, M.; Figueira, P.; Santos, N. C.; Amazo-Gómez, E. M.; Sousa, S. G.; Adibekyan, V.; Akinsanmi, B.; Demangeon, O.; Faria, J.; Gomes Da Silva, J.; Meunier, N. (2020). "The correlation between photometric variability and radial velocity jitter. Based on TESS and HARPS observations". Astronomy and Astrophysics. 639: 639. arXiv:2005.10105. Bibcode:2020A&A...639A..35H. doi:10.1051/0004-6361/202038035. S2CID 218719951.
- ^ Maldonado, J.; Micela, G.; Baratella, M.; d'Orazi, V.; Affer, L.; Biazzo, K.; Lanza, A. F.; Maggio, A.; González Hernández, J. I.; Perger, M.; Pinamonti, M.; Scandariato, G.; Sozzetti, A.; Locci, D.; Di Maio, C.; Bignamini, A.; Claudi, R.; Molinari, E.; Rebolo, R.; Ribas, I.; Toledo-Padrón, B.; Covino, E.; Desidera, S.; Herrero, E.; Morales, J. C.; Suárez-Mascareño, A.; Pagano, I.; Petralia, A.; Piotto, G.; Poretti, E. (2020). "HADES RV programme with HARPS-N at TNG. XII. The abundance signature of M dwarf stars with planets". Astronomy and Astrophysics. 644: A68. arXiv:2010.14867. Bibcode:2020A&A...644A..68M. doi:10.1051/0004-6361/202039478. S2CID 260555994.
- ^ "Ross 47". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 16 February 2021.