Astronomy:HD 127304
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Short description: Double star in the constellation Boötes
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 14h 29m 49.67058s[2] |
| Declination | +31° 47′ 28.2787″[2] |
| Apparent magnitude (V) | 6.05[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2][4] |
| Spectral type | A0Vs(Si)[5] |
| U−B color index | −0.06[3] |
| B−V color index | −0.03[3] |
| Astrometry | |
| Radial velocity (Rv) | −9.3[6] km/s |
| Proper motion (μ) | RA: −20.815[2] mas/yr Dec.: +7.137[2] mas/yr |
| Parallax (π) | 9.2332 ± 0.0401[2] mas |
| Distance | 353 ± 2 ly (108.3 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.86[1] |
| Details | |
| Mass | 2.5[2] M☉ |
| Radius | 2.3[2] R☉ |
| Luminosity | 52[2] L☉ |
| Surface gravity (log g) | 3.99[2] cgs |
| Temperature | 10,345[2] K |
| Metallicity [Fe/H] | 0.23[7] dex |
| Rotational velocity (v sin i) | 14[4] km/s |
| Age | 263[2] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 127304 is a sixth magnitude A-type main sequence star in the northern constellation of Boötes, with a stellar classification of A0Vs(Si). The Si indicates abnormal strength of the silicon absorption lines in its spectrum, although it is considered doubtful that HD 127304 is actually a chemically peculiar star.[9]
HD 127304 has a faint magnitude 10.62 companion at an angular separation of 25.6″ along a position angle of 256° (as of 2013),[10] It is thought to be physically related, lying about 2,348 au from the primary.[11] There is further 11th-magnitude star 107" away,[10] but this is unrelated background object.[12]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M.
- ↑ 4.0 4.1 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z.
- ↑ Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ Wilson, R. E. (1953), "General Catalogue of Stellar Radial Velocities", Carnegie Institute Washington D.C. Publication (Carnegie Institute of Washington D.C.), Bibcode: 1953GCRV..C......0W.
- ↑ Wang, Yinpeng; Zhang, Liyun; Su, Tianhao; Han, Xianming L.; Misra, Prabhakar (2024). "Magnetic activity of radio stars based on TESS and LAMOST surveys". Astronomy and Astrophysics 686: A164. doi:10.1051/0004-6361/202348342. Bibcode: 2024A&A...686A.164W.
- ↑ "HD 127304". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+127304.
- ↑ Renson, P.; Manfroid, J. (2009). "Catalogue of Ap, HGMN and Am stars". Astronomy and Astrophysics 498 (3): 961. doi:10.1051/0004-6361/200810788. Bibcode: 2009A&A...498..961R.
- ↑ 10.0 10.1 Mason, B. D. et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal 122 (6): 3466, doi:10.1086/323920, Bibcode: 2001AJ....122.3466M, http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/wds, retrieved 2015-07-22
- ↑ Lindroos, K. P. (1985). "A study of visual double stars with early type primaries. IV. Astrophysical data". Astronomy and Astrophysics Supplement Series 60: 183. Bibcode: 1985A&AS...60..183L.
- ↑ Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
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