HD 49674

HD 49674 is an 8th magnitude G-type main-sequence star (spectral type G5V) located approximately 144 light years away in the constellation of Auriga. It has a very similar mass to our Sun. It is orbited by a recently discovered planet.[3]

HD 49674

HD 49674 in optical light
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension  06h 51m 30.514s[1]
Declination +40° 52′ 03.92″[1]
Apparent magnitude (V) 8.1
Characteristics
Spectral type G5V
B−V color index 0.729
Astrometry
Radial velocity (Rv)11.8 ± 0.3 km/s
Proper motion (μ) RA: 32.23 ± 0.97[1] mas/yr
Dec.: −122.70 ± 0.69[1] mas/yr
Parallax (π)22.61 ± 0.87[1] mas
Distance144 ± 6 ly
(44 ± 2 pc)
Absolute magnitude (MV)8.81
Details
Mass1.07 ± 0.02[2] M☉
Radius1.01 ± 0.01[2] R☉
Luminosity0.96 ± 0.01[2] L☉
Surface gravity (log g)4.46 ± 0.02[2] cgs
Temperature5702 ± 28[2] K
Age1.8 ± 1.2[2] Gyr
Other designations
Nervia, GSC 02946-00426, SAO 41390, uvby98 100049674, AG+40° 813, AGKR 6129, HIP 32916, SPOCS 324, BD+41° 1544, PPM 49392, TYC 2946-426-1.
Database references
SIMBADdata

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.[4]

Planetary system

At the time of discovery of the planet HD 49674 b in 2002, it was the least massive planet known, very close to the boundary between sub-Jupiter mass and Neptune-mass at 0.1 MJ. This planet orbits very close to the star.

The HD 49674 planetary system[5]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >0.105 ± 0.011 MJ 0.0580 ± 0.0034 4.94737 ± 0.00098 0.087 ± 0.095 — —
gollark: The solar panels are just multiblocks which sit there making arbitrary amounts of power for no particular reason. There's a void *resource* miner which is just the void ore miner but for grass and obsidian and stuff, which is also a boring way to avoid making any production for diverse arbitrary resources you might need but is also required for the ET stuff because it makes "mica".
gollark: The advanced ones are an add-on.
gollark: The pack's overall tiers at least require fairly diverse things on each tier. The inscribers would, if I cared about that, be interesting to automate through ME subnetting and such. Thermal Expansion has fairly weak gating (internally) behind hardened glass stuff.
gollark: It's not that it's annoying. It's that it's really bland and uninteresting.
gollark: The only differences are that the later ones are faster and produce other crystals.

See also
  • List of extrasolar planets

References
  1. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
  3. Butler, R. Paul; et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal. 582 (1): 455–466. Bibcode:2003ApJ...582..455B. CiteSeerX 10.1.1.7.6988. doi:10.1086/344570.
  4. "Belgium". NameExoworlds. Retrieved 2019-12-22.
  5. 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.


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