HIP 79098

HIP 79098
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Scorpius
Right ascension 16h 08m 43.7s[1]
Declination −23° 41′ 07.5″[1]
Apparent magnitude (V) +5.88[1] (5.87 to 5.90)[2]
Characteristics
Spectral type B9V[1]
B9 Mn P Ga[3]
B9 IVn + Ap(Si)s[4]
U−B color index +0.02[1]
B−V color index −0.31[1]
Variable type α2 CVn[2]
Astrometry
Radial velocity (Rv)−16.0[1] km/s
Proper motion (μ) RA: −10.09±0.22[5] mas/yr
Dec.: −26.09±0.18[5] mas/yr
Parallax (π)6.4762 ± 0.1839 mas[5]
Distance500 ± 10 ly
(154 ± 4 pc)
Absolute magnitude (MV)−0.33±0.07[6]
Details
Mass3.46±0.14 M☉[7]
2.5[6] M☉
Radius3.2[8] R☉
Luminosity190 ± 40[7] L☉
Surface gravity (log g)3.76[8] cgs
Temperature12,430±460[7] K
Metallicity [Fe/H]+0.033[9] dex
Rotational velocity (v sin i)45.0±1.5[7] km/s
Age10±3[6] Myr
Other designations
CD−23 12731, HD 144844, HIP 79098, HR 6003, SAO 184164[1]
Database references
SIMBADdata

HIP 79098 is a binary star in the constellation Scorpius. It has a visual apparent magnitude of +5.88,[1] being visible to the naked eye under very dark skies. From parallax measurements by the Gaia spacecraft, it is located approximately 500 light-years (154 parsecs) from Earth.[5]

This system consists of a chemically peculiar B-type star, plus a spectroscopic companion of unknown type. Two additional distant red dwarfs may be part of the system, at separations of 9,500 and 12,900 AU. In 2019, a brown dwarf was discovered orbiting the central binary at a distance of about 350 AU.[6]

  1. ^ a b c d e f g h i Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference vsx was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference GCVS was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Abt1995 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference EDR3 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Janson2019 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Paunzen2013 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference tic was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference K2 was invoked but never defined (see the help page).