HD 211415

From Wikipedia, the free encyclopedia
Jump to: navigation, search
HD 211415 A/B
Observation data
Epoch J2000      Equinox J2000
Constellation Grus
Right ascension 22h 18m 15.6152s
Declination –53° 37′ 37.465″
Apparent magnitude (V) 5.33
Characteristics
Spectral type G1-3 V/M V
U−B color index 0.06
B−V color index 0.59
Variable type None
Astrometry
Radial velocity (Rv) -13.9 km/s
Proper motion (μ) RA: 439.88 mas/yr
Dec.: –632.60 mas/yr
Parallax (π) 73.47 ± 0.70 mas
Distance 44.4 ± 0.4 ly
(13.6 ± 0.1 pc)
Absolute magnitude (MV) 4.66
Details
Mass 1.0/0.5 M
Radius 0.96/0.56 R
Luminosity 1.09/0.018 L
Temperature 5,925(A) K
Metallicity 49-54%(A) Sun
Rotation ?
Age (2.6–4.1) × 109[1] years
Other designations
GJ 853 A, HR 8501, CD -54°9222, HD 211415, LHS 3790, LTT 8943, GCTP 5395.00, SAO 247400, LFT 1702, HIP 110109.

HD 211415 is a binary star system in the constellation Grus. It has a relatively high proper motion and is located about 44 light years from the Sun.

These two stars have an orbit with a semi-major axis of 3.4″, which is approximately equal to 46 astronomical units (au). This is larger than the orbit of Pluto around our Sun, which has a semi-major axis of 39.5 au. This system has not been observed for a sufficient length of time to establish the remaining orbital parameters with sufficient precision.

Possibility of planets and life[edit]

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.[2]

References[edit]

  1. ^ Mamajek, Eric E.; Hillenbrand, Lynne A. (November 2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". The Astrophysical Journal 687 (2): 1264–1293. arXiv:0807.1686. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785. 
  2. ^ "Astronomer Announces Shortlist Of Stellar Candidates For Habitable Worlds". Science Daily. 2006-02-21. Retrieved 2006-05-24. 

External links[edit]