HD 50138

HD 50138

A light curve for V743 Monocerotis (HD 50138), plotted from TESS data.[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Monoceros
Right ascension 06h 51m 33.399s[2]
Declination −06° 57′ 59.45″[2]
Apparent magnitude (V) 6.58[3]
Characteristics
Spectral type B6-7III-V[e][4]
B−V color index 0.030±0.008[3]
Variable type γ Cas[5] or FS CMa[6]
Astrometry
Radial velocity (Rv)40.8±0.2[6] km/s
Proper motion (μ) RA: −3.678 mas/yr
Dec.: 4.178 mas/yr
Parallax (π)2.8487 ± 0.0459 mas[2]
Distance1,140 ± 20 ly
(351 ± 6 pc)
Absolute magnitude (MV)0.22[3]
Details
Mass6[7] M☉
Radius7.0±2.1[7] R☉
Luminosity(1.2±0.4)×103[7] L☉
Surface gravity (log g)4.63±0.16[8] cgs
Temperature6,391±241[8]
13,000[7] K
Metallicity [Fe/H]0.18±0.04[3] dex
Rotational velocity (v sin i)1.81389[8] km/s
Other designations
MWC 158, V743 Mon, BD−06°1775, GC 8983, HD 50138, HIP 32923, SAO 133781, PPM 189615[9]
Database references
SIMBADdata

HD 50138 is a peculiar star in the equatorial constellation of Monoceros, the unicorn. It has the variable star designation V743 Monocerotis. The typical apparent visual magnitude of this star is 6.58,[3] placing it near the lower limit for visibility to the naked eye.[3] Based on parallax measurements,[2] this star is located at a distance of approximately 1,140 light years. It is drifting further away with a heliocentric radial velocity of 41 km/s.[6] This is an isolated star, being located far from any star forming region and having a low proper motion.[6]

  1. ^ Cite error: The named reference MAST was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference GaiaEDR3 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Varga_et_al_2019 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Samus_et_al_2017 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Sandell_et_al_2018 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Koutoulaki_et_al_2018 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Jönsson_et_al_2020 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).