Astronomy:Eta1 Doradus
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Short description: Star in the constellation Dorado
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Dorado[1] |
| Right ascension | 06h 06m 09.38177s[2] |
| Declination | −66° 02′ 22.6352″[2] |
| Apparent magnitude (V) | 5.72[1] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | A0V[3] |
| U−B color index | −0.024±0.004[1] |
| B−V color index | −0.03[4] |
| Astrometry | |
| Radial velocity (Rv) | +17.6±4.3[1] km/s |
| Proper motion (μ) | RA: +13.575[2] mas/yr Dec.: +28.139[2] mas/yr |
| Parallax (π) | 9.5464 ± 0.0474[2] mas |
| Distance | 342 ± 2 ly (104.8 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.75[1] |
| Details | |
| Mass | 2.46[5] M☉ |
| Radius | 2.5[6] R☉ |
| Luminosity | 49[7] L☉ |
| Surface gravity (log g) | 4.09±0.08[8] cgs |
| Temperature | 10,325±240[8] K |
| Rotational velocity (v sin i) | 149[5] km/s |
| Age | 94[5] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Eta1 Doradus, Latinized from η1 Doradus, is a star in the southern constellation of Dorado. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.72.[1] This object is located approximately 342 light years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of +18 km/s.[1] It is circumpolar south of latitude 24°S.
This object is an A-type main-sequence star with a stellar classification of A0V.[3] It is 94[5] million years old with a high rotation rate, showing a projected rotational velocity of 149.[5] The star has 2.46[5] times the mass of the Sun and is radiating 49[7] times the Sun's luminosity from its photosphere at an effective temperature of 10,325 K.[8] It is the northern pole star of Venus.[10]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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 Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1975mcts.book.....H.
- ↑ HR 2194, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 25, 2008.
- ↑ 5.0 5.1 5.2 5.3 5.4 5.5 David, Trevor J.; Hillenbrand, Lynne A. (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.
- ↑ Stassun, Keivan G. et al. (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.
- ↑ 7.0 7.1 McDonald, I. et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–57, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
- ↑ 8.0 8.1 8.2 Decin, L. et al. (September 2004), "MARCS: Model Stellar Atmospheres and Their Application to the Photometric Calibration of the Spitzer Space Telescope Infrared Spectrograph (IRS)", Astrophysical Journal Supplement 154 (1): 408–412, doi:10.1086/422884, Bibcode: 2004ApJS..154..408D. See Table 1.
- ↑ "HD 42525". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+42525.
- ↑ Archinal, Brent A.; A'Hearn, Michael F.; Bowell, Edward G.; Conrad, Albert R.; Consolmagno, Guy J. et al. (2010). "Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2009". Celestial Mechanics and Dynamical Astronomy 109 (2): 101–135. doi:10.1007/s10569-010-9320-4. Bibcode: 2011CeMDA.109..101A. http://astropedia.astrogeology.usgs.gov/alfresco/d/d/workspace/SpacesStore/28fd9e81-1964-44d6-a58b-fbbf61e64e15/WGCCRE2009reprint.pdf. Retrieved 2018-09-06.
External links
- 2004. Starry Night Pro, Version 5.8.4. Imaginova. ISBN 978-0-07-333666-4. www.starrynight.com
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