astro.wikisort.org - Planet
HAT-P-29, also known as Muspelheim since 2019 (as part of the IAU's NameExoWorlds project),[6] is the primary of a binary star system about 1030 light-years 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.[5] HAT-P-29 is slightly enriched in heavy elements, having 35% more iron than the Sun.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 02h 12m 31.4785s[1] |
| Declination | +51° 46′ 43.5621″[1] |
| Apparent magnitude (V) | 11.83 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | G |
| Astrometry | |
| Radial velocity (Rv) | -21.11[1] km/s |
| Proper motion (μ) | RA: -9.805[1] mas/yr Dec.: 1.898[1] mas/yr |
| Parallax (π) | 3.161 ± 0.0441 mas[2] |
| Distance | 1,030 ± 10 ly (316 ± 4 pc) |
| Orbit[3] | |
| Primary | HAT-P-29 |
| Companion | HAT-P-29 B |
| Semi-major axis (a) | 3.290±0.002" (1041 AU) |
| Details[4] | |
| 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[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The very faint 19-magnitude stellar companion was detected in 2016 at a projected separation of 3.290±0.002″.[3]
Planetary system
In 2011 a transiting hot Jupiter planet b was detected on a mildly eccentric orbit.[5] The planet was named "Surt" by Denmark in 2019.[7] The planetary orbit is likely aligned with the equatorial plane of the star, misalignment equal to 26±16 degrees.[8]
In 2018, a transit-timing variation survey indicated additional planets with masses exceeding approximately half of Earth are absent in the system.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (Surt) | 0.767+0.046 −0.045 MJ |
0.0665±0.0012 | 5.723376±0.000021 | 0.073+0.029 −0.028 |
88.06+0.78 −0.59° |
1.055+0.079 −0.072 RJ |
References
- "HAT-P-29". SIMBAD. Centre de données astronomiques de Strasbourg.
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- Ngo, Henry; Knutson, Heather A.; Hinkley, Sasha; Bryan, Marta; Crepp, Justin R.; Batygin, Konstantin; Crossfield, Ian; Hansen, Brad; Howard, Andrew W.; Johnson, John A.; Mawet, Dimitri; Morton, Timothy D.; Muirhead, Philip S.; Wang, Ji (2016), "FRIENDS OF HOT JUPITERS. IV. STELLAR COMPANIONS BEYOND 50 au MIGHT FACILITATE GIANT PLANET FORMATION, BUT MOST ARE UNLIKELY TO CAUSE KOZAI–LIDOV MIGRATION", The Astrophysical Journal, 827 (1): 8, arXiv:1606.07102, Bibcode:2016ApJ...827....8N, doi:10.3847/0004-637X/827/1/8, S2CID 41083068
- Wang, Songhu; Wang, Xian-Yu; Wang, Yong-Hao; Liu, Hui-Gen; Hinse, Tobias C.; Eastman, Jason; Bayliss, Daniel; Hori, Yasunori; Hu, Shao-Ming; Li, Kai; Liu, Jinzhong; Narita, Norio; Peng, Xiyan; Wittenmyer, R. A.; Wu, Zhen-Yu; Zhang, Hui; Zhang, Xiaojia; Zhao, Haibin; Zhou, Ji-Lin; Zhou, George; Zhou, Xu; Laughlin, Gregory (2018), "Transiting Exoplanet Monitoring Project (TEMP). I. Refined System Parameters and Transit Timing Variations of HAT-P-29b", The Astronomical Journal, 156 (4): 181, arXiv:1807.10107, Bibcode:2018AJ....156..181W, doi:10.3847/1538-3881/aadcfc, S2CID 119415237
- Buchhave, L. A.; Bakos, G. Á.; Hartman, J. D.; Torres, G.; Latham, D. W.; Andersen, J.; Kovács, G.; Noyes, R. W.; Shporer, A.; Esquerdo, G. A.; Fischer, D. A.; Johnson, J. A.; Marcy, G. W.; Howard, A. W.; Béky, B.; Sasselov, D. D.; Fűrész, G.; Quinn, S. N.; Stefanik, R. P.; Szklenár, T.; Berlind, P.; Calkins, M. L.; Lázár, J.; Papp, I.; Sári, P. (2011), "HAT-P-28b AND HAT-P-29b: TWO SUB-JUPITER MASS TRANSITING PLANETS", The Astrophysical Journal, 733 (2): 116, arXiv:1103.1813, Bibcode:2011ApJ...733..116B, doi:10.1088/0004-637X/733/2/116, S2CID 119293967
- IAU100 NameExoWorlds APPROVED NAMES
- Denmark names new planet after Norse fire giant Surt
- The GAPS Programme at TNG XXXVI. Measurement of the Rossiter-McLaughlin effect and revising the physical and orbital parameters of the HAT-P-15, HAT-P-17, HAT-P-21, HAT-P-26, HAT-P-29 eccentric planetary systems, 2022, arXiv:2205.10549
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На других языках
- [en] HAT-P-29
[ru] HAT-P-29
HAT-P-29 — звезда, которая находится в созвездии Персей на расстоянии около 1050 световых лет от нас. Вокруг звезды обращается, как минимум, одна экзопланета. В рамках конкурса NameExoWorlds, проводимым Международным астрономическим союзом в 2019 году, звезда получила собственное имя Муспельхейм (Muspelheim)[5].Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.
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