Eta1 Doradus

For other stars with this Bayer designation, see η Doradus.
Eta1 Doradus
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Dorado
Right ascension 06h 06m 09.38154s[1]
Declination −66° 02′ 22.6304″[1]
Apparent magnitude (V) 5.72[2]
Characteristics
Spectral type A0V[3]
U−B color index −0.024±0.004[2]
B−V color index −0.03[4]
Astrometry
Radial velocity (Rv)+17.6±4.3[2] km/s
Proper motion (μ) RA: +13.656[1] mas/yr
Dec.: +27.815[1] mas/yr
Parallax (π)9.7251 ± 0.1094 mas[1]
Distance335 ± 4 ly
(103 ± 1 pc)
Absolute magnitude (MV)+0.75[2]
Details
Mass2.46[5] M☉
Luminosity49[6] L☉
Surface gravity (log g)4.09±0.08[7] cgs
Temperature10,325±240[7] K
Rotational velocity (v sin i)149[5] km/s
Age94[5] Myr
Other designations
η1 Dor, CPD−66° 493, GC 7813, HD 42525, HIP 28909, HR 2194, SAO 249448, PPM 355182, TYC 8905-1950-1[8]
Database references
SIMBADdata

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.[2] This object is located approximately 335 light years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of +18 km/s.[2] 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[6] times the Sun's luminosity from its photosphere at an effective temperature of 10,325 K.[7] It is the southern pole star of Venus.[9]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference bsc1 was invoked but never defined (see the help page).
  5. ^ a b c d e f Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference marcs was invoked but never defined (see the help page).
  8. ^ "HD 42525". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved September 25, 2008.
  9. ^ 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" (PDF). Celestial Mechanics and Dynamical Astronomy. 109 (2): 101–135. Bibcode:2011CeMDA.109..101A. doi:10.1007/s10569-010-9320-4. S2CID 189842666. Archived from the original (PDF) on 2016-03-04. Retrieved 2018-09-06.