HR 511

HR 511
Location of HR 511 (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Cassiopeia
Right ascension 01h 47m 44.83363s[1]
Declination +63° 51′ 09.0073″[1]
Apparent magnitude (V) 5.63[2]
Characteristics
Spectral type K0 V[3]
U−B color index +0.40[2]
B−V color index +0.80[3]
Astrometry
Radial velocity (Rv)+1.41[3] km/s
Proper motion (μ) RA: +582.028±0.070[1] mas/yr
Dec.: −246.228±0.086[1] mas/yr
Parallax (π)99.5746 ± 0.0595 mas[1]
Distance32.75 ± 0.02 ly
(10.043 ± 0.006 pc)
Absolute magnitude (MV)5.61[4]
Details
Mass0.825±0.021[5] M☉
Radius0.819±0.024[6] R☉
Luminosity0.516±0.010[5] L☉
Temperature5,407±4.0[7] K
Metallicity [Fe/H]−0.02[8] dex
Rotation21.67 days[9]
Rotational velocity (v sin i)2.0[9] km/s
Age2.2 - 3.5[9] Gyr
Other designations
V987 Cassiopeiae, BD+63°238, GJ 75, HD 10780, HIP 8362, HR 511, SAO 11983, LHS 1297, LTT 10619[10]
Database references
SIMBADdata
ARICNSdata

HR 511 (also designated V987 Cassiopeiae and Gliese 75 among others) is an orange dwarf of spectral type K0V in the constellation Cassiopeia. With an apparent magnitude of 5.63,[2] it is faintly visible to the naked eye. The star is relatively close, 32.8 light years from the Sun.[1]

This star is estimated to be about the same age as the Sun, with 83% of the mass of the Sun and 82% of the Sun's radius. It has not been identified as a member of any moving star groups. This star has displayed unusual emissions of Ca II and is much more x-ray luminous than the Sun. It is considered a relatively active star.[9] Based on an iron abundance of [Fe/H] = −0.02, the metallicity of this star appears to be similar to that of the Sun.[8]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference aj133_6_2524 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Holmberg2009 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference apj746_1_101 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference aaa505_1_205 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference aaa411_3_559 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference metal was invoked but never defined (see the help page).
  9. ^ a b c d Cite error: The named reference gaidos 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).