HAT-P-29

HAT-P-29 / Muspelheim
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 02h 12m 31.47875s[1]
Declination +51° 46′ 43.5637″[1]
Apparent magnitude (V) 11.83
Characteristics
Evolutionary stage main-sequence star
Spectral type G
Astrometry
Radial velocity (Rv)−21.91±0.69[1] km/s
Proper motion (μ) RA: -9.972 mas/yr[1]
Dec.: 1.790 mas/yr[1]
Parallax (π)3.1358 ± 0.0201 mas[1]
Distance1,040 ± 7 ly
(319 ± 2 pc)
Orbit[2]
PrimaryHAT-P-29
CompanionHAT-P-29 B
Semi-major axis (a)3.290±0.002"
(1041 AU)
Details[3]
Mass1.198+0.065
−0.063
 M
Radius1.229+0.080
−0.073
 R
Luminosity1.89+0.3
−0.25
 L
Surface gravity (log g)4.337+0.045
−0.045
 cgs
Temperature6112±88 K
Metallicity [Fe/H]0.128+0.079
−0.080
 dex
Age2.2±1.0[4] Gyr
Other designations
Muspelheim, Gaia DR2 359058441314838528, TYC 3293-1539-1, GSC 03293-01539, 2MASS J02123147+5146435[5]
Database references
SIMBADdata

HAT-P-29, also known as Muspelheim since 2019 (as part of the IAU's NameExoWorlds project),[6] is a star about 1,040 light-years (320 parsecs) away. It is a G-type main-sequence star. The star's age of 2.2±1.0 billion years is less than half that of the Sun.[4] HAT-P-29 is slightly enriched in heavy elements, having 35% more iron than the Sun.

A very faint 19th-magnitude stellar companion was detected in 2016 at a projected separation of 3.290±0.002″,[2] but Gaia DR2 astrometry suggests that this is an unrelated background object.[7]

  1. ^ a b c d e Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Ngo2016 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Wang2018 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Buchhave2011 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference simbad was invoked but never defined (see the help page).
  6. ^ IAU100 NameExoWorlds APPROVED NAMES
  7. ^ Cite error: The named reference mugauer2019 was invoked but never defined (see the help page).