HD 211415

HD 211415
Observation data
Epoch J2000      Equinox J2000
Constellation Grus[1]
Right ascension 22h 18m 15.6134s[2]
Declination –53° 37′ 37.467″[2]
Apparent magnitude (V) 5.40 + 9.70[3]
Characteristics
Spectral type G0V[4] + MV
U−B color index +0.06[5]
B−V color index +0.61[5]
Astrometry
Radial velocity (Rv)−12.68±0.17[6] km/s
Proper motion (μ) RA: +441.230 mas/yr[2]
Dec.: −629.750 mas/yr[2]
Parallax (π)71.0938±0.0554 mas[2]
Distance45.88 ± 0.04 ly
(14.07 ± 0.01 pc)
Absolute magnitude (MV)4.69[7]
Orbit[8]
Period (P)218+17
−14 yr
Semi-major axis (a)42.3+2.3
−2.0 AU
Eccentricity (e)0.775+0.057
−0.071
Inclination (i)75.8+1.8
−2.2°
Details
HD 211415 A
Mass1.080±0.054[8] M☉
Radius1.048±0.040[9] R☉
Luminosity1.16±0.03[9] L☉
Surface gravity (log g)4.38±0.02[10] cgs
Temperature5,871±5[10] K
Metallicity [Fe/H]−0.230±0.004[10] dex
Rotational velocity (v sin i)0.32[11] km/s
Age6.50+0.50
−0.31[10] Gyr
HD 211415 B
Mass0.511+0.034
−0.030[8] M☉
Other designations
CD -54°9222, GCTP 5395.00, GJ 853 A, HD 211415, HIP 110109, HR 8501, LHS 3790, LFT 1702, LTT 8943, SAO 247400.[12]
Database references
SIMBADdata

HD 211415 is a double star in the constellation Grus. With an apparent visual magnitude of 5.33,[5] it is visible to the naked eye. The annual parallax shift is 71.09 mas,[2] which yields a distance measurement of 45.88 light years. It has a relatively high proper motion, traversing the celestial sphere at the rate of 769 mas per year,[2] and is moving closer to the Sun with a radial velocity of −13 km/s.[6]

The two members of this system take about 220 years to complete an orbit around each other, and are separated about a semi-major axis of 42.3 AU, although the very high orbital eccentricity of 0.775 mean this value is highly variable.[8]

HD 211415 was identified in September 2003 by astrobiologist Margaret Turnbull from the University of Arizona in Tucson as one of the most promising nearby candidates for hosting life based on her analysis of the HabCat list of stars.[13] It is a G-type main-sequence star with a stellar classification of G0 V,[4] and has 6.5 billion years of age.[10]

References

  1. ^ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific. 99 (617): 695. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Constellation record for this object at VizieR.
  2. ^ a b c d e f 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.
  3. ^ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi:10.1086/323920. ISSN 0004-6256. HD 211415's database entry at VizieR.
  4. ^ a b Gray, R. O.; et al. (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): 161–70. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. S2CID 119476992.
  5. ^ a b c Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. SIMBAD. Bibcode:1986EgUBV........0M.{{cite journal}}: CS1 maint: postscript (link)
  6. ^ 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.
  7. ^ 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.{{cite journal}}: CS1 maint: postscript (link)
  8. ^ a b c d An, Qier; Brandt, Timothy D.; Brandt, G. Mirek; Venner, Alexander (2025-08-11). "Orbits and Masses for 156 Companions from Combined Astrometry and Radial Velocities, and A Validation of Gaia Non-Single Star Solutions". The Astrophysical Journal Supplement Series. arXiv:2508.08374.
  9. ^ a b Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara; Fleming, Scott W.; Rose, Mark E.; Tenenbaum, Peter; Ting, Eric B. (2019-10-01). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv:1905.10694. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256. HD 211415 A's database entry at VizieR.
  10. ^ a b c d e Martos, Giulia; Meléndez, Jorge; Rathsam, Anne; Carvalho-Silva, Gabriela (2023-04-21). "Metallicity and age effects on lithium depletion in solar analogues". Monthly Notices of the Royal Astronomical Society. 522 (3): 3217–3226. arXiv:2305.01861. Bibcode:2023MNRAS.522.3217M. doi:10.1093/mnras/stad1177. ISSN 0035-8711.
  11. ^ Martínez-Arnáiz, R.; et al. (September 2010). "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter" (PDF). Astronomy and Astrophysics. 520: A79. arXiv:1002.4391. Bibcode:2010A&A...520A..79M. doi:10.1051/0004-6361/200913725. S2CID 43455849. Archived from the original (PDF) on 2017-09-22. Retrieved 2018-11-04.
  12. ^ "HD 45088". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2015-04-17.
  13. ^ "Astronomer Announces Shortlist Of Stellar Candidates For Habitable Worlds". Science Daily. 2006-02-21. Retrieved 2006-05-24.
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