HD 211415

HD 211415 A/B
Observation data
Epoch J2000      Equinox J2000
Constellation Grus
Right ascension 22h 18m 15.61403s[1]
Declination –53° 37′ 37.4640″[1]
Apparent magnitude (V) 5.33[2]/9.9[3]
Characteristics
Spectral type G0V[4] + MV
U−B color index +0.06[2]
B−V color index +0.61[2]
Astrometry
Radial velocity (Rv)−12.68±0.17[5] km/s
Proper motion (μ) RA: +438.75[1] mas/yr
Dec.: –632.46[1] mas/yr
Parallax (π)72.54 ± 0.36 mas[1]
Distance45.0 ± 0.2 ly
(13.79 ± 0.07 pc)
Absolute magnitude (MV)4.69[6]
Details
HD 211415 A
Mass0.941±0.016[7] M☉
Surface gravity (log g)4.42±0.03[7] cgs
Temperature5,864±18[7] K
Metallicity [Fe/H]−0.21±0.01[7] dex
Rotational velocity (v sin i)0.32[8] km/s
Age2.6–4.1[9] Gyr
HD 211415 B
Mass0.59[10] 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.[11]
Database references
SIMBADdata

HD 211415 is a double star in the constellation Grus. With an apparent visual magnitude of 5.33,[2] it is visible to the naked eye. The annual parallax shift is 72.54 mas, which yields a distance estimate of 45 light years. It has a relatively high proper motion, traversing the celestial sphere at the rate of 93.4 mas per year,[12] and is moving closer to the Sun with a radial velocity of −13 km/s.[5]

As of 1994, the two members of this system have an angular separation of 2.884″ along a position angle of 34.935°.[3] Their projected separation is 39.8 AU.[12] The pair are most likely gravitationally-bound with an orbit is probably being viewed nearly edge-on and a semimajor axis of around 100 AU.[13]

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.[14] It is a G-type main-sequence star with a stellar classification of G0 V.[4]

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  7. ^ a b c d Cite error: The named reference aa_555_A150 was invoked but never defined (see the help page).
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  12. ^ a b Cite error: The named reference Tokovinin2015 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Krist2010 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference habcat was invoked but never defined (see the help page).