Ross 47

Ross 47
	Ross 47 Location of Ross 47 in the constellation Orion;
Observation data; Epoch J1950.0 Equinox J1950.0
Constellation	Orion
Right ascension	05h 42m 09.26769s
Declination	+12° 29′ 21.6048″
Apparent magnitude (V)	+11.48 - 11.55
Characteristics
Evolutionary stage	red dwarf
Spectral type	M4V
U−B color index	+14.264
B−V color index	+13.130
Variable type	BY Dra
Astrometry
Radial velocity (Rv)	106.06±0.18 km/s
Proper motion (μ)	RA: +1,997.342 mas/yr ; Dec.: −1569.63 mas/yr
Parallax (π)	172.6762 ± 0.0286 mas
Distance	18.888 ± 0.003 ly ; (5.7912 ± 0.0010 pc)
Absolute magnitude (MV)	+12.73
Details
Mass	0.218±0.005 M☉
Radius	0.238±0.009 R☉
Luminosity	0.006288±0.000094 L☉
Surface gravity (log g)	4.44 cgs
Temperature	3,334+67; −63 K
Metallicity [Fe/H]	−0.19±0.17 dex
Rotation	170
Rotational velocity (v sin i)	3.1 km/s
Age	7.1 Gyr
Other designations
	V1352 Ori, GJ 213, HIP 26857, Ci 20 344, G 102-22, LFT 425, LHS 31, LTT 11704, NLTT 15489, Ross 47, TYC 722-455-1, 2MASS J05420897+1229252
Database references
SIMBAD	data

Ross 47 is a variable star of spectral type M4 located in the constellation Orion, 19 light-years from Earth.

A visual band light curve for V1352 Orionis, adapted from Weis (1994)^[11]

Ross 47 was given the variable star designation V1352 in 1997.^[12]

References

^ ^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.
^ Weis, Edward W. (March 1994). "Long Term Variability in Dwarf M Stars". Astronomical Journal. 107 (3): 1135. Bibcode:1994AJ....107.1135W. doi:10.1086/116925. Retrieved 7 September 2024.
^ Kazarovets, E. V.; Samus, N. N. (April 1997). "The 73rd Name-List of Variable Stars". Information Bulletin on Variable Stars (4471). Bibcode:1997IBVS.4471....1K. Retrieved 7 September 2024.