HD 211415
| 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[1] mas |
| Distance | 45.0 ± 0.2 ly (13.79 ± 0.07 pc) |
| Details | |
| HD 211415 A | |
| Mass | 0.941 ± 0.016[6] M☉ |
| Surface gravity (log g) | 4.42 ± 0.03[6] cgs |
| Temperature | 5864 ± 18[6] K |
| Metallicity [Fe/H] | –0.21 ± 0.01[6] dex |
| Rotational velocity (v sin i) | 0.32[7] km/s |
| Age | 2.6–4.1[8] Gyr |
| HD 211415 B | |
| Mass | 0.59[9] M☉ |
| Other designations | |
HD 211415 is a double star in the constellation Grus. It has a relatively high proper motion and is located about 45 light years from the Sun.
As of 1994, the two members of this system have an angular separation of 0.778″ along a position angle of 145.9°. This corresponds to an estimated semimajor axis of 57.75 AU.[3] 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
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.[11]
References
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- ↑ 3.0 3.1 Lua error in package.lua at line 80: module 'strict' not found. See pp. 80–81.
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External links
- Spectra HD 211415
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