HD 46375

HD 46375
Observation data
Epoch J2000      Equinox J2000
Constellation Monoceros
Right ascension 06h 33m 12.62259s[1]
Declination +05° 27′ 46.5278″[1]
Apparent magnitude (V) 7.91[2]
Characteristics
Spectral type G9V[3] + M0V[4]
B−V color index 0.860[2]
Variable type Constant[5]
Astrometry
Radial velocity (Rv)−1.07±0.20[1] km/s
Proper motion (μ) RA: +111.477[1] mas/yr
Dec.: –96.918[1] mas/yr
Parallax (π)33.8088 ± 0.0435 mas[1]
Distance96.5 ± 0.1 ly
(29.58 ± 0.04 pc)
Absolute magnitude (MV)5.20[2]
Details
A
Mass0.91±0.01[6] M☉
Radius1.01±0.01[6] R☉
Luminosity0.77±0.01[6] L☉
Surface gravity (log g)4.38±0.01[6] cgs
Temperature3,663±15[7] K
Metallicity [Fe/H]+0.27±0.06[3] dex
Rotation42+9
−7[8]
Rotational velocity (v sin i)0.86[9] km/s
Age2.6±0.8 Gyr[8]
4.38±2.54 Gyr[3]
11.9±1.1[6] Gyr
B
Mass0.576±0.013[10] M☉
Other designations
BD+05°1295, HD 46375, HIP 31246, SAO 114040[11]
Database references
SIMBADdata

HD 46375 is double star[10] with an exoplanetary companion in the equatorial constellation of Monoceros. It presents as an 8th-magnitude star with an apparent visual magnitude of 7.91,[2] which is too dim to be readily visible to the naked eye. The system is located at a distance of 96.5 light-years from the Sun based on parallax measurements,[1] but is slowly drifting closer with a radial velocity of −1 km/s.[1] The common proper motion stellar companion, designated HD 46375 B, has a linear projected separation of 346±13 AU.[10]

The primary component is a solar-type[8] star with a stellar classification of G9V,[3] matching a G-type main-sequence star. Age estimates for this star range from 2.6[8] up to 11.9[6] billion years. It is a chromospherically inactive star and is spinning slowly[5] with a projected rotational velocity of 0.86 km/s.[9] The absolute magnitude of this star places it one magnitude brighter than the equivalent for a zero age main sequence.[5] It has 91% of the mass and 101% of the radius of the Sun. The star is radiating 77%[6] of the luminosity of the Sun from its photosphere at an effective temperature of 3,663 K.[7]

This star has sometimes been classified as a member of the NGC 2244 star cluster in the Rosette Nebula, but in reality it just happens to lie in the foreground. The distance to the cluster is much greater, about 4500 light-years.

  1. ^ a b c d e f g h Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Grieves_et_al_2018 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Terrien_et_al_2012 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Marcy2000 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference Bonfanti_et_al_2016 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference apj748_2_934 was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Gaulme2010 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Butler2006 was invoked but never defined (see the help page).
  10. ^ a b c Cite error: The named reference Mugrauer_et_al_2006 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).