Astronomy:Ross 47

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Short description: Star in the constellation Orion

Coordinates: Sky map 05h 42m 09.26772s, +12° 29′ 21.6225″

Ross 47
Ross 47 is located in the constellation Orion
Ross 47 is located in the constellation Orion
Ross 47
Location of Ross 47 in the constellation Orion

Observation data
Equinox J2000.0]] (ICRS)
Constellation Orion[1]
Right ascension  05h 42m 09.26769s[2]
Declination +12° 29′ 21.6048″[2]
Apparent magnitude (V) +11.48 - 11.55[3]
Characteristics
Evolutionary stage red dwarf
Spectral type M4V[4]
U−B color index +14.264
B−V color index +13.130
Variable type BY Dra[3]
Astrometry
Radial velocity (Rv)106.06±0.18[2] km/s
Proper motion (μ) RA: +1,997.342[2] mas/yr
Dec.: −1569.63[2] mas/yr
Parallax (π)172.6762 ± 0.0286[2] mas
Distance18.888 ± 0.003 ly
(5.7912 ± 0.0010 pc)
Absolute magnitude (MV)+12.73[1]
Details
Mass0.218±0.005[5] M☉
Radius0.238±0.009[5] R☉
Luminosity0.006288±0.000094[5] L☉
Surface gravity (log g)4.44[2] cgs
Temperature3,334+67
−63[5] K
Metallicity [Fe/H]−0.19±0.17[6] dex
Rotation170[7]
Rotational velocity (v sin i)3.1[8] km/s
Age7.1[9] 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[10]
Database references
SIMBADdata

Ross 47 is a variable star of spectral type M4 located in the constellation Orion. Based on parallax measurements, it lies 18.888 light-years from Earth.

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

Ross 47 is a small red dwarf with 23.8% of the Sun's size, and 6% of its luminosity. Its effective temperature is much cooler than the Sun's, about 3,330 K.[5] It is a BY Draconis variable, a star which whose brightness varies across its rotation, having multiple starspots that contribute to the brightness variation.[3] Its apparent magnitude varies from +11.48 to 11.55.[3] Ross 47 was given the variable star designation V1352 Orionis in 1997.[12]

References

  1. ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 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. ↑ 3.0 3.1 3.2 3.3 Samus, N. N. et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. GCVS 5.1 61 (1): 80–88. doi:10.1134/S1063772917010085. Bibcode: 2017ARep...61...80S. 
  4. ↑ 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. doi:10.1086/191611. Bibcode: 1991ApJS...77..417K. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 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. doi:10.3847/1538-4357/ac0aea. 40. Bibcode: 2021ApJ...918...40P. 
  6. ↑ 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, doi:10.1051/0004-6361/201937194, Bibcode: 2020A&A...636A...9A 
  7. ↑ 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. doi:10.1051/0004-6361/201527078. Bibcode: 2017A&A...600A..13A. 
  8. ↑ Hojjatpanah, S.; Oshagh, M.; Figueira, P.; Santos, N. C.; Amazo-Gómez, E. M.; Sousa, S. G.; Adibekyan, V.; Akinsanmi, B. et al. (2020). "The correlation between photometric variability and radial velocity jitter. Based on TESS and HARPS observations". Astronomy and Astrophysics 639: 639. doi:10.1051/0004-6361/202038035. Bibcode: 2020A&A...639A..35H. 
  9. ↑ Maldonado, J.; Micela, G.; Baratella, M.; d'Orazi, V.; Affer, L.; Biazzo, K.; Lanza, A. F.; Maggio, A. et al. (2020). "HADES RV programme with HARPS-N at TNG. XII. The abundance signature of M dwarf stars with planets". Astronomy and Astrophysics 644: A68. doi:10.1051/0004-6361/202039478. Bibcode: 2020A&A...644A..68M. 
  10. ↑ "Ross 47". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=Ross+47. 
  11. ↑ Weis, Edward W. (March 1994). "Long Term Variability in Dwarf M Stars". Astronomical Journal 107 (3): 1135. doi:10.1086/116925. Bibcode: 1994AJ....107.1135W. https://ui.adsabs.harvard.edu/abs/1994AJ....107.1135W/abstract. Retrieved 7 September 2024. 
  12. ↑ Kazarovets, E. V.; Samus, N. N. (April 1997). "The 73rd Name-List of Variable Stars". Information Bulletin on Variable Stars 4471 (4471): 1. Bibcode: 1997IBVS.4471....1K. https://ui.adsabs.harvard.edu/abs/1997IBVS.4471....1K/abstract. Retrieved 7 September 2024. 



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