Back اتا ماهی پرنده Persian Eta Volantis Polish Eta Volantis Portuguese Eta Volantis Swedish 飛魚座η Chinese

Eta Volantis

η Volantis
Location of η Volantis.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Volans
Right ascension 08h 22m 04.45155s[1]
Declination −73° 23′ 59.9258″[1]
Apparent magnitude (V) 5.28±0.01
Characteristics
Spectral type A0/1 IV/V[2]
B−V color index +0.01[3]
Astrometry
Radial velocity (Rv)+20.0±3.7[4] km/s
Proper motion (μ) RA: −29.432[1] mas/yr
Dec.: +29.926[1] mas/yr
Parallax (π)8.4310 ± 0.0887 mas[1]
Distance387 ± 4 ly
(119 ± 1 pc)
Absolute magnitude (MV)−0.06[5]
Details
Mass2.73±0.08[6] M☉
Radius3.78±0.12[7] R☉
Luminosity84[8] L☉
Surface gravity (log g)3.81±0.04[6] cgs
Temperature9,789±427[9] K
Rotational velocity (v sin i)214[10] km/s
Age347[6] Myr
Other designations
η Vol, CPD−72°694, FK5 2653, HD 71576, HIP 41003, HR 3334, SAO 256505[11]
Database references
SIMBADdata

Eta Volantis, Latinized from η Volantis, is a single star[12] in the southern constellation of Volans. It has an apparent visual magnitude of 5.28,[13] which is bright enough to be seen with the naked eye as a dim, white-hued star. Based upon parallax measurements, it is approximately 387 light years from the Sun. The star is moving further away from the Sun with a radial velocity of 20 km/s.[4]

This is an A-type star with a stellar classification of A0/1 IV/V,[2] displaying blended spectrum that shows aspects of a main sequence star and a subgiant. Stellar evolution models from Zorec and Royer (2012) place it near the main sequence turnoff, having completed 90.7% of its time on the main sequence. The star is estimated to be 347 million years old[6] and is spinning rapidly with a projected rotational velocity of 214 km/s.[10] It has 2.73 times the mass of the Sun[6] and 3.43 times the Sun's radius.[7] Eta Volantis is radiating 84[8] times the luminosity of the Sun from its photosphere at an effective temperature of 9,789 K.[9]

Eta Volantis has two 12th magnitude optical companions at angular separations of 26.8 and 48.1 arcseconds.[14]

  1. ^ a b c d e Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Houk1975 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Scholz2007 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference Gerbaldi1999 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Stassun2019 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Paunzen2006 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference aaa463_2_671 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Tycho2000 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).
From Wikipedia, the free encyclopedia · View on Wikipedia

Developed by Tubidy