HD 38858

HD 38858
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Orion
Right ascension 05h 48m 34.93996s[1]
Declination −04° 05′ 40.7153″[1]
Apparent magnitude (V) +5.97[2]
Characteristics
Spectral type G4V[3]
U−B color index +0.10[2]
B−V color index +0.64[2]
Astrometry
Radial velocity (Rv)+31.2[4] km/s
Proper motion (μ) RA: 60.84 ± 0.41[1] mas/yr
Dec.: –228.35 ± 0.33[1] mas/yr
Parallax (π)65.89 ± 0.41 mas[1]
Distance49.5 ± 0.3 ly
(15.18 ± 0.09 pc)
Details
Mass0.886[5] M☉
Radius0.9331 ± 0.0162[5] R☉
Luminosity0.7943 ± 0.0101[5] L☉
Surface gravity (log g)4.36 ± 0.06[3] cgs
Temperature5,660 ± 20[3] K
Metallicity [Fe/H]–0.27 ± 0.03[3] dex
Rotational velocity (v sin i)2.61[6] km/s
Age6.2[7] Gyr
Other designations
BD–04 1244, FK5 1155, GJ 1085, HD 38858, HIP 27435, LTT 2380, SAO 132554, 2MASS .
Database references
SIMBADdata
Exoplanet Archivedata

HD 38858 is a G-type star,[3] much like The Sun, with one detected planet. The planet, designated HD 38858 b, is about twice the mass of Uranus and orbits in the star's habitable zone.[8]

The last observation of this system for a dust disc or comet belt was in 2009 by the Spitzer Space Telescope; a belt was inferred at 102 AU.[7] It has an inclination of 48◦.[9]

The star exhibit a magnetic activity cycle remarkably similar to that of Sun, with the period of 10.8 years.[10]

  1. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference clpl4 was invoked but never defined (see the help page).
  3. ^ a b c d e J. Maldonado; C. Eiroa; E. Villaver; B. Montesinos; A. Mora (2012). "Metallicity of solar-type stars with debris discs and planets". Astronomy & Astrophysics. 541: A40. arXiv:1202.5884. Bibcode:2012A&A...541A..40M. doi:10.1051/0004-6361/201218800. S2CID 46328823.
  4. ^ Cite error: The named reference Nordstrom2004 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Boyajian2013 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference aaa520_A79 was invoked but never defined (see the help page).
  7. ^ a b Wyatt, M. C.; et al. (2012). "Herschel imaging of 61 Vir: implications for the prevalence of debris in low-mass planetary systems". Monthly Notices of the Royal Astronomical Society. 424 (2): 1206. arXiv:1206.2370. Bibcode:2012MNRAS.424.1206W. doi:10.1111/j.1365-2966.2012.21298.x. S2CID 54056835. citing Lawler et al. 2009, and recalculating its distance.
  8. ^ LTT 2380 -- High proper-motion Star, SIMBAD Astronomical Database, accessed 11 October 2012.
  9. ^ Bryden et al., promised in John E. Krist; Karl R. Stapelfeldt; Geoffrey Bryden; Peter Plavchan (2012), "Hubble Space Telescope Observations of the HD 202628 Debris Disk", Astronomical Journal, 144 (2): 45, arXiv:1206.2078, Bibcode:2012AJ....144...45K, doi:10.1088/0004-6256/144/2/45, S2CID 40040285
  10. ^ Cite error: The named reference Flores2018 was invoked but never defined (see the help page).