Astronomy:HD 75171
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Volans |
| Right ascension | 08h 44m 29.9582s[1] |
| Declination | −65° 49′ 31.550″[1] |
| Apparent magnitude (V) | 6.02±0.01[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A4 V[4] |
| U−B color index | +0.08[5] |
| B−V color index | +0.20[5] |
| Astrometry | |
| Radial velocity (Rv) | 10.7±0.5[6] km/s |
| Proper motion (μ) | RA: −63.156[1] mas/yr Dec.: +103.462[1] mas/yr |
| Parallax (π) | 17.0428 ± 0.0235[1] mas |
| Distance | 191.4 ± 0.3 ly (58.68 ± 0.08 pc) |
| Absolute magnitude (MV) | +2.19[7] |
| Details | |
| Mass | 1.81[8] M☉ |
| Radius | 1.84±0.05[9] R☉ |
| Luminosity | 11.7±0.4[3] L☉ |
| Surface gravity (log g) | 4.33[10] cgs |
| Temperature | 7,998±272[10] K |
| Metallicity [Fe/H] | −0.06[11] dex |
| Rotational velocity (v sin i) | 96±1[12] km/s |
| Age | 630[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 75171, also known as HR 3495, is a solitary,[8] white hued star located in the southern constellation of Volans. It has an apparent magnitude of 6.02,[2] making it faintly visible to the naked eye under ideal conditions. The object is relatively close at a distance of 191 light years but is receding with a heliocentric radial velocity of 10.7 km/s. Eggen (1995) lists it as a probable member of the Hyades Supercluster.
HD 75171 has a stellar classification of A4 V,[4] indicating that it is an ordinary A-type main-sequence star. It has also been given a cooler class of A9 V.[13] It has 1.81 times the mass of the Sun[8] and a diameter of 1.84 R☉.[9] It radiates at 12 times the luminosity of the Sun[3] from its photosphere at an effective temperature of 7,998 K.[10] Like most hot stars, it spins quickly with a projected rotational velocity of 96 km/s.[12] HD 75171 is estimated to be 630 million years old,[8] well around the age of the actual Hyades cluster. Zorec and Royer (2012) model it to be a dwarf star 50.4% through its main sequence lifetime,[3] and Gaia Data Release 3 models also show a star roughly halfway through its main sequence life.[1] The star has a near solar metallicity, with the iron abundance being 87% that of the Sun.[11]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 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.
- ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 3.2 3.3 Zorec, J.; Royer, F. (January 2012). "Rotational velocities of A-type stars". Astronomy & Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. ISSN 0004-6361. Bibcode: 2012A&A...537A.120Z.
- ↑ 4.0 4.1 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations −90° to −53°. Bibcode: 1975mcts.book.....H.
- ↑ 5.0 5.1 Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J.
- ↑ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G.
- ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 8.0 8.1 8.2 8.3 8.4 De Rosa, R. J. et al. (26 November 2013). "The VAST Survey – III. The multiplicity of A-type stars within 75 pc". Monthly Notices of the Royal Astronomical Society 437 (2): 1216–1240. doi:10.1093/mnras/stt1932. ISSN 0035-8711. Bibcode: 2014MNRAS.437.1216D.
- ↑ 9.0 9.1 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ 10.0 10.1 10.2 David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal 804 (2): 146. doi:10.1088/0004-637X/804/2/146. Bibcode: 2015ApJ...804..146D.
- ↑ 11.0 11.1 Netopil, Martin (4 May 2017). "Metallicity calibrations for dwarf stars and giants in the Geneva photometric system". Monthly Notices of the Royal Astronomical Society 469 (3): 3042–3055. doi:10.1093/mnras/stx1077. ISSN 0035-8711. Bibcode: 2017MNRAS.469.3042N.
- ↑ 12.0 12.1 Díaz, C. G.; González, J. F.; Levato, H.; Grosso, M. (July 2011). "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum". Astronomy & Astrophysics 531: A143. doi:10.1051/0004-6361/201016386. ISSN 0004-6361. Bibcode: 2011A&A...531A.143D.
- ↑ Evans, D. S. (1966). "Fundamental data for Southern stars (6th list).". Royal Greenwich Observatory Bulletins 110: 185. Bibcode: 1966RGOB..110..185E.
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