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 mas[1] |
| 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
- ^ a b c d e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
- ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV data., SIMBAD, Bibcode:1986EgUBV........0M.
- ^ a b Poveda, A.; et al. (April 1994), "Statistical studies of visual double and multiple stars. II. A catalogue of nearby wide binary and multiple systems", Revista Mexicana de Astronomía y Astrofísica, 28 (1): 43–89, Bibcode:1994RMxAA..28...43P. See pp. 80–81.
- ^ 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.
- ^ 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
- ^ a b c d Tsantaki, M.; et al. (July 2013), "Deriving precise parameters for cool solar-type stars. Optimizing the iron line list", Astronomy & Astrophysics, 555: A150, arXiv:1304.6639, Bibcode:2013A&A...555A.150T, doi:10.1051/0004-6361/201321103.
- ^ 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". Astronomy and Astrophysics. 520: A79. arXiv:1002.4391. Bibcode:2010A&A...520A..79M. doi:10.1051/0004-6361/200913725.
- ^ 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.
- ^ Tokovinin, Andrei (April 2014), "From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs", The Astronomical Journal, 147 (4): 14, arXiv:1401.6827, Bibcode:2014AJ....147...87T, doi:10.1088/0004-6256/147/4/87, 87.
- ^ "HD 45088 -- Variable of BY Dra type", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2015-04-17.
- ^ "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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