HD 49674

HD 49674 / Nervia

HD 49674 (center) in optical light
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 06h 51m 30.51634s[1]
Declination +40° 52′ 03.9256″[1]
Apparent magnitude (V) 8.10[2]
Characteristics
Spectral type G3V[3]
B−V color index 0.729±0.015[2]
Astrometry
Radial velocity (Rv)11.97±0.27[1] km/s
Proper motion (μ) RA: 34.587[1] mas/yr
Dec.: −122.797[1] mas/yr
Parallax (π)23.2054 ± 0.0411 mas[1]
Distance140.6 ± 0.2 ly
(43.09 ± 0.08 pc)
Absolute magnitude (MV)4.88[2]
Details
Mass1.07±0.02[4] M☉
Radius1.01±0.01[4] R☉
Luminosity0.96±0.01[4] L☉
Surface gravity (log g)4.46±0.02[4] cgs
Temperature5,702±28[4] K
Metallicity [Fe/H]0.34±0.06[3] dex
Rotational velocity (v sin i)4.7[5] km/s
Age1.8±1.2[4] Gyr
Other designations
Nervia, BD+41° 1544, HD 49674, HIP 32916, SAO 41390, PPM 49392, TYC 2946-426-1, GSC 02946-00426[6]
Database references
SIMBADdata

HD 49674 is a solar-type star with an exoplanetary companion[7] in the northern constellation of Auriga. It has an apparent visual magnitude of 8.10[2] and thus is an eighth-magnitude star that is too faint to be readily visible to the naked eye. The system is located at a distance of 140.6 light-years from the Sun based on parallax, and is drifting further away with a radial velocity of +12 km/s.[1]

HD 49674, and its planetary system, was chosen as part of the 2019 NameExoWorlds campaign organised by the International Astronomical Union, which assigned each country a star and planet to be named. HD 49674 was assigned to Belgium. The winning proposal named the star Nervia and the planet Eburonia, both after prominent Belgic tribes, the Nervii and Eburones, respectively.[8]

This is an ordinary G-type main-sequence star with a stellar classification of G3V,[3] which indicates it is generating energy through hydrogen fusion at its core. Spinning with a projected rotational velocity of 4.7 km/s,[5] it is younger than the Sun, roughly two billion years of age, and is a metal-rich star.[7] HD 49674 has a similar mass and radius as the Sun. It is radiating 96% of the Sun's luminosity from its photosphere at an effective temperature of 5,702 K.[4]

  1. ^ a b c d e f g 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 Cite error: The named reference Grieves_et_al_2018 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Bonfanti2015 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Earle2017 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Butler2003 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference nameexoworldsbelgium was invoked but never defined (see the help page).