HD 107148

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HD 107148
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo
Right ascension 12h 19m 13.4909s[1]
Declination −03° 19′ 11.242″[1]
Apparent magnitude (V) 8.02
Characteristics
Spectral type G5V
Astrometry
Proper motion (μ) RA: −54.787±0.108[1] mas/yr
Dec.: −47.395±0.064[1] mas/yr
Parallax (π)20.2077 ± 0.0470[1] mas
Distance161.4 ± 0.4 ly
(49.5 ± 0.1 pc)
Orbit[2]
PrimaryHD 107148
CompanionHD 107148 B
Semi-major axis (a)35"
(1790 AU)
Details[3]
HD 107148
Mass1.1±0.1 M☉
Radius1.15±0.03 R☉
Luminosity1.34±0.05 L☉
Surface gravity (log g)4.35±0.03 cgs
Temperature5789±36 K
Metallicity [Fe/H]0.33±0.09[4] dex
Rotational velocity (v sin i)1.22±0.20[4] km/s
Age4±1 Gyr
HD 107148 B
Mass0.6[2] M☉
Temperature6250±250[2] K
Other designations
BD−02 3497, Gaia DR2 3693358861640279296, HIP 60081, SAO 138714, 2MASS J12191349-0319112[5]
Database references
SIMBADdata

HD 107148 is an 8th magnitude primary of the binary star system located approximately 161 light years away in the constellation of Virgo. It is a yellow dwarf with a luminosity 1.41 times the Sun. It is twice as enriched with heavy elements than the Sun. The HD 107148 exhibits a magnetic activity cycle with a period around 6 years.[6]

In 2012, a comoving white dwarf stellar companion HD 107148 B was detected[7] at projected separation of 1790 AU, and was confirmed in 2014. It is a 0.6 M☉ remnant core of the former 1.8±0.2 M☉ star.[2]

Planetary system[]

In 2006, a discovery of Saturn-mass planet was announced.[8] Another Neptune-sized planet was discovered in 2021, together with significantly refined orbit of HD 107148 b.[6]

HD 107148 should not be confused with HD 108147, which also has an extrasolar planet located in Crux constellation discovered in 2000.


The HD 107148 planetary system[6]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b >0.203 ± 0.0015 MJ 0.3668+0.0047
−0.0048 		77 0.174+0.071
−0.075 		— —
c >0.0626+0.0097
−0.0098 MJ 		0.1406±0.0018 18.3267+0.0022
−0.0024 		0.34+0.13
−0.16 		— —

See also[]

  • List of extrasolar planets

References[]

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ a b c d New wide stellar companions of exoplanet host stars
  3. ^ Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2015), "Age consistency between exoplanet hosts and field stars", Astronomy & Astrophysics, 585: A5, arXiv:1511.01744, doi:10.1051/0004-6361/201527297, S2CID 53971692
  4. ^ a b Spectroscopic Parameters and atmosphEric ChemIstriEs of Stars (SPECIES) I. Code description and dwarf stars catalogue
  5. ^ "HD 107148". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-11-12.
  6. ^ a b c Rosenthal, Lee J.; Fulton, Benjamin J.; Hirsch, Lea A.; Isaacson, Howard T.; Howard, Andrew W.; Dedrick, Cayla M.; Sherstyuk, Ilya A.; Blunt, Sarah C.; Petigura, Erik A.; Knutson, Heather A.; Behmard, Aida; Chontos, Ashley; Crepp, Justin R.; Crossfield, Ian J. M.; Dalba, Paul A.; Fischer, Debra A.; Henry, Gregory W.; Kane, Stephen R.; Kosiarek, Molly; Marcy, Geoffrey W.; Rubenzahl, Ryan A.; Weiss, Lauren M.; Wright, Jason T. (2021), The California Legacy Survey I. A Catalog of 177 Planets from Precision Radial Velocity Monitoring of 719 Nearby Stars over Three Decades, arXiv:2105.11583
  7. ^ Wide companions to Hipparcos stars within 67 pc of the Sun
  8. ^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.

Coordinates: Sky map 12h 19m 13.4909s, −03° 19′ 11.242″

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