HR 858

HR 858

Position of HR 858 in Fornax
Observation data
Epoch J2000.00      Equinox J2000.00
Constellation Fornax
Right ascension 02h 51m 56.246s[1]
Declination −30° 48′ 52.26″[1]
Apparent magnitude (V) 6.382[2]
Characteristics
Evolutionary stage F6V[3] + M[4]
Spectral type Main sequence
B−V color index +0.484[5]
Astrometry
Radial velocity (Rv)+10.07±0.13[1] km/s
Proper motion (μ) RA: 123.229±0.070[1] mas/yr
Dec.: 105.788±0.151[1] mas/yr
Parallax (π)31.2565 ± 0.0700 mas[1]
Distance104.3 ± 0.2 ly
(31.99 ± 0.07 pc)
Absolute magnitude (MV)+3.82[5]
Details[4]
A
Mass1.145+0.074
−0.080 M☉
Radius1.310+0.0240
−022 R☉
Luminosity2.348+0.069
−0.071 L☉
Surface gravity (log g)4.19±0.10 cgs
Temperature6,201±50 K
Metallicity [Fe/H]−0.14±0.08 dex
Rotational velocity (v sin i)8.3±0.5 km/s
Age2.28±1.30[6] Gyr
B
Radius0.17±0.04 R☉
Temperature2,800±300 K
Other designations
CD−31°1148, GC 3443, HD 17926, HIP 13363, HR 858, SAO 193951, TOI 396[7]
Database references
SIMBADdata

HR 858 is a star with a planetary system located 104[1] light years from the Sun in the southern constellation of Fornax. It has a yellow-white hue and is visible to the naked eye, but it is a challenge to see with an apparent visual magnitude of 6.4.[2] The star is drifting further away with a radial velocity of 10 km/s.[1] It has an absolute magnitude of +3.82.[5]

This object is a slightly-evolved F-type main-sequence star with a stellar classification of F6V,[3] which indicates it is generating energy through core hydrogen fusion. It is roughly two[6] billion years old and is spinning with a projected rotational velocity of 8.3 km/s. The star has 1.1 times the mass of the Sun and 1.3 times the Sun's radius. It is radiating 2.3 times the luminosity of the Sun from its photosphere at an effective temperature of 6,201 K.[4]

A faint co-moving stellar companion, designated component B, at an angular separation of 8.4″. This corresponds to a projected separation of 270 AU. It is most likely a red dwarf star.[4]

  1. ^ a b c d e f g h Cite error: The named reference dr2 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference tycho2 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference nstars was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference tess was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference xhip was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Pace2013 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).