HD 211415: Difference between revisions
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'''HD 211415''' is a [[binary star]] system in the [[constellation]] [[Grus (constellation)|Grus]]. It has a relatively high [[proper motion]] and is located about 44 [[light year]]s from the [[Sun]]. |
'''HD 211415''' is a [[binary star]] system in the [[constellation]] [[Grus (constellation)|Grus]]. It has a relatively high [[proper motion]] and is located about 44 [[light year]]s from the [[Sun]]. |
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These two stars have an orbit with a [[semi-major axis]] of 3.4″, which is approximately equal to 46 [[ |
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. |
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==Possibility of planets and life== |
==Possibility of planets and life== |
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Revision as of 17:17, 31 October 2013
| 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 | |
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
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
- ^ Mamajek, Eric E.; Hillenbrand, Lynne A. (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.
{{cite journal}}: Unknown parameter|month=ignored (help)CS1 maint: multiple names: authors list (link) - ^ "Astronomer Announces Shortlist Of Stellar Candidates For Habitable Worlds". Science Daily. 2006-02-21. Retrieved 2006-05-24.
External links
- Spectra HD 211415
- "HD 211415 -- High proper-motion Star". SIMBAD: Centre de Données astronomiques de Strasbourg. Retrieved 2006-06-08.
- "HR 8501 / HD 211415 AB". SolStation. Retrieved 2006-06-08.
- "4C01821". ARICNS. Retrieved 2006-06-08.
- "Gliese 853 (HD 211415, HIP 110109)". The Encyclopedia of Astrobiology. Retrieved 2006-06-08.
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