Eta1 Doradus
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Dorado |
| Right ascension | 06h 06m 09.3817s[1] |
| Declination | −66° 02′ 22.635″[1] |
| Apparent magnitude (V) | 5.697[1] |
| Characteristics | |
| Spectral type | A0V[1] |
| U−B color index | −0.07[2] |
| B−V color index | −0.03[2] |
| Astrometry | |
| Radial velocity (Rv) | 17.6 ± 5[1] km/s |
| Proper motion (μ) | RA: 13.51[1] mas/yr Dec.: 27.98[1] mas/yr |
| Parallax (π) | 9.82 ± 0.46 mas[1] |
| Distance | 330 ± 20 ly (102 ± 5 pc) |
| Absolute magnitude (MV) | +0.75[3] |
| Details | |
| Mass | 2.46[4] M☉ |
| Luminosity | 49[5] L☉ |
| Surface gravity (log g) | 4.09±0.08[6] cgs |
| Temperature | 10,325±240[6] K |
| Rotational velocity (v sin i) | 149[4] km/s |
| Age | 94[4] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Eta1 Doradus, Latinized from η1 Doradus, is the Bayer designation for an A-type main sequence star in the constellation of Dorado, around 330 light-years from the Earth.[1] It has an apparent visual magnitude of approximately 5.697.[1] It has a radius of 3.1 solar radii, and a luminosity of 56 suns.[citation needed] This star will be observed to be circumpolar south of latitude 24°S.
η1 Doradus can be considered the south pole star of Venus, as it is the closest bright star to Venus's south celestial pole.[citation needed]
References
- ^ a b c d e f g h i j k "HD 42525". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 25, 2008.
- ^ a b 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.
- ^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015.
- ^ a b c 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, arXiv:1501.03154, Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146.
- ^ McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x
{{citation}}: CS1 maint: unflagged free DOI (link) - ^ a b Table 1, MARCS: Model Stellar Atmospheres and Their Application to the Photometric Calibration of the Spitzer Space Telescope Infrared Spectrograph (IRS), L. Decin, P. W. Morris, P. N. Appleton, V. Charmandaris, L. Armus, and J. R. Houck, Astrophysical Journal Supplement 154, #1 (September 2004), pp. 408–412, doi:10.1086/422884, Bibcode:2004ApJS..154..408D.
External links
- 2004. Starry Night Pro, Version 5.8.4. Imaginova. ISBN 978-0-07-333666-4. www.starrynight.com
