HAT-P-29

HAT-P-29 / Muspelheim
Observation data; Epoch J2000 Equinox J2000
Constellation	Perseus
Right ascension	02h 12m 31.47875s
Declination	+51° 46′ 43.5637″
Apparent magnitude (V)	11.83
Characteristics
Evolutionary stage	main-sequence star
Spectral type	G
Astrometry
Radial velocity (Rv)	−21.91±0.69 km/s
Proper motion (μ)	RA: -9.972 mas/yr ; Dec.: 1.790 mas/yr
Parallax (π)	3.1358 ± 0.0201 mas
Distance	1,040 ± 7 ly ; (319 ± 2 pc)
Orbit
Primary	HAT-P-29
Companion	HAT-P-29 B
Semi-major axis (a)	3.290±0.002"; (1041 AU)
Details
Mass	1.198+0.065; −0.063 M☉
Radius	1.229+0.080; −0.073 R☉
Luminosity	1.89+0.3; −0.25 L☉
Surface gravity (log g)	4.337+0.045; −0.045 cgs
Temperature	6112±88 K
Metallicity [Fe/H]	0.128+0.079; −0.080 dex
Age	2.2±1.0 Gyr
Other designations
	Muspelheim, Gaia DR2 359058441314838528, TYC 3293-1539-1, GSC 03293-01539, 2MASS J02123147+5146435
Database references
SIMBAD	data

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]

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

[dr3-1] Cite error: The named reference dr3 was invoked but never defined (see the help page).

[Ngo2016-2] Cite error: The named reference Ngo2016 was invoked but never defined (see the help page).

[Wang2018-3] Cite error: The named reference Wang2018 was invoked but never defined (see the help page).

[Buchhave2011-4] Cite error: The named reference Buchhave2011 was invoked but never defined (see the help page).

[simbad-5] Cite error: The named reference simbad was invoked but never defined (see the help page).

[6] IAU100 NameExoWorlds APPROVED NAMES

[mugauer2019-7] Cite error: The named reference mugauer2019 was invoked but never defined (see the help page).

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Observation data Epoch J2000 Equinox J2000
Constellation	Perseus
Right ascension	02^h 12^m 31.47875^s^[1]
Declination	+51° 46′ 43.5637″^[1]
Apparent magnitude (V)	11.83
Characteristics
Evolutionary stage	main-sequence star
Spectral type	G
Astrometry

Radial velocity (R_v)	−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]
Distance	1,040 ± 7 ly (319 ± 2 pc)

Orbit^[2]
Primary	HAT-P-29
Companion	HAT-P-29 B
Semi-major axis (a)	3.290±0.002" (1041 AU)
Details^[3]

Mass	1.198^+0.065 _−0.063 `M`_☉
Radius	1.229^+0.080 _−0.073 `R`_☉
Luminosity	1.89^+0.3 _−0.25 `L`_☉
Surface gravity (log g)	4.337^+0.045 _−0.045 cgs
Temperature	6112±88 K
Metallicity [Fe/H]	0.128^+0.079 _−0.080 dex
Age	2.2±1.0^[4] Gyr

Other designations
Muspelheim, Gaia DR2 359058441314838528, TYC 3293-1539-1, GSC 03293-01539, 2MASS J02123147+5146435^[5]
Database references
SIMBAD	data

HAT-P-29

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