Rho3 Eridani

For other star systems with this Bayer designation, see Rho Eridani.
ρ3 Eridani
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Eridanus
Right ascension 03h 04m 16.51707s[1]
Declination −07° 36′ 03.0859″[1]
Apparent magnitude (V) 5.26[2]
Characteristics
Spectral type A5 V[3]
U−B color index +0.07[2]
B−V color index +0.21[2]
Astrometry
Radial velocity (Rv)15.0±4.2[4] km/s
Proper motion (μ) RA: +67.56[1] mas/yr
Dec.: +17.43[1] mas/yr
Parallax (π)24.06 ± 0.40 mas[1]
Distance136 ± 2 ly
(41.6 ± 0.7 pc)
Absolute magnitude (MV)+2.17[5]
Details
Mass1.83[6] M☉
Radius1.2[7] R☉
Luminosity10[8] L☉
Temperature7,400[8] K
Rotational velocity (v sin i)186[9] km/s
Age500[6] Myr
Other designations
ρ3 Eridani, ρ3 Eri, 10 Eridani, BD−08°572, HD 19107, HIP 14293, HR 925, SAO 130269.[10]
Database references
SIMBADdata

Rho3 Eridani, Latinized from ρ3 Eridani, is a star located in the constellation Eridanus. It forms an asterism with Rho1 and Rho2 Eridani, south of Cetus, in the upper north east portion of Eridanus. The star has an apparent visual magnitude of 5.26,[2] which is bright enough to be seen with the naked eye on a dark, clear night. The distance to this star, as determined via the parallax method,[1] is about 136 light years.

This is an A-type main sequence star with a stellar classification of A5 V.[3] (Some sources list it as A8 V.)[11] It is some 500 million years old and is spinning rapidly with a projected rotational velocity of 186 km/s.[9] This rotation is giving the star a slightly oblate shape, with the equator being 5% larger than the poles.[11] The star has about 120% of the radius of the Sun,[7] and 183% of the Sun's mass. It shines with 10 times the solar luminosity from its outer atmosphere at an effective temperature of 7,400 K.[8]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Gontcharov2006 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 Cite error: The named reference DeRosa2014 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference aaa367_521 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Royer2007 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference vanBelle2012 was invoked but never defined (see the help page).