HD 130322

HD 130322 / Mönch
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo[1]
Right ascension 14h 47m 32.7262s[2]
Declination −00° 16′ 53.308″[2]
Apparent magnitude (V) 8.04[1]
Characteristics
Spectral type K0V[3]
B−V color index 0.781±0.002[1]
Astrometry
Radial velocity (Rv)−12.388±0.0005[4] km/s
Proper motion (μ) RA: −130.476(25) mas/yr[2]
Dec.: −140.246(25) mas/yr[2]
Parallax (π)31.3356 ± 0.0262 mas[2]
Distance104.08 ± 0.09 ly
(31.91 ± 0.03 pc)
Absolute magnitude (MV)5.54[1]
Details[5]
Mass0.92±0.03 M☉
Radius0.85±0.04 R☉
Luminosity0.62[1] L☉
Surface gravity (log g)4.52±0.06 cgs
Temperature5,387±44 K
Metallicity [Fe/H]−0.02[6] dex
Rotation26.53±0.70 d
Rotational velocity (v sin i)0.5±0.5 km/s
Age6.1±2.9[7] Gyr
Other designations
BD+00 3243, HD 130322, HIP 72339, LTT 5873, NLTT 38386[8]
Database references
SIMBADThe star
planet b
Exoplanet Archivedata

HD 130322 is a star with a close orbiting exoplanet in the constellation of Virgo. The distance to this system is 104 light years, as determined using parallax measurements. It is drifting closer to the Sun with a radial velocity of −12.4 km/s.[4] With an apparent visual magnitude of 8.04,[1] it is too dim to be visible to the naked eye; requiring binoculars or a small telescope to view. Being almost exactly on the celestial equator the star is visible everywhere in the world except for the North Pole. The star shows a high proper motion, traversing the celestial sphere at an angular rate of 0.197 arcsec yr−1.[9]

The spectrum of this star presents as a K-type main-sequence star, an orange dwarf, with a stellar classification of K0V.[3] The star has 92% of the mass of the Sun and 85% of the Sun's radius. It is spinning with a rotation period of 26.5 days.[5] HD 130322 is radiating 62%[1] of the luminosity of the Sun from its photosphere at an effective temperature of 5,387 K.[5] It is estimated to be around six billion years old.[7]

The star HD 130322 is named Mönch and its companion is Eiger. The names were selected in the NameExoWorlds campaign by Switzerland, during the 100th anniversary of the IAU. Mönch and Eiger are prominent peaks of the Bernese Alps.[10][11]

  1. ^ a b c d e f g Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Gaia DR3 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk_Swift_1999 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Soubiran_et_al_2018 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Hinkel2015 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Udry2000 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Bonfanti_et_al_2016 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Luyten1995 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference exoworlds was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference IAU was invoked but never defined (see the help page).