astro.wikisort.org - StarHD 142245 is a hierarchical triple star system about 318 light-years away.
Triple star system in the constellation Serpens
HD 142245
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Serpens |
Right ascension |
15h 52m 56.2803s[1] |
Declination |
+15° 25′ 50.5399″[1] |
Apparent magnitude (V) |
7.45 |
Characteristics |
Evolutionary stage |
subgiant |
Spectral type |
K0IV+M1[2] |
Astrometry |
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|
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Radial velocity (Rv) | 6.92 km/s |
Proper motion (μ) | RA: -57.477 mas/yr Dec.: -21.764 mas/yr |
Parallax (π) | 10.2562 ± 0.0411 mas[3] |
Distance | 318 ± 1 ly (97.5 ± 0.4 pc) |
|
Orbit |
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Primary | HD 142245 A |
Companion | HD 142245 BC |
Semi-major axis (a) | 2.5" (237 AU[4]) |
Details[5] |
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HD 142245 A |
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Mass | 1.52±0.05[2] M☉ |
Radius | 4.8±0.1[6] R☉ |
Luminosity | 11.4[6] L☉ |
Surface gravity (log g) | 3.21±0.14 cgs |
Temperature | 4838±36[7] K |
Metallicity | 0.20±0.02[7] |
Age | 2.855±0.514 Gyr |
HD 142245 BC |
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Mass | 0.56[4] M☉ |
Other designations |
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BD+15 2925, Gaia DR2 1193193836691820032, HD 142245, HIP 77783, TYC 1496-1841-1, 2MASS J15525629+1525507[1] |
Database references |
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SIMBAD | data |
The primary subgiant star HD 142245 A belongs to the spectral class of K0. Its age is much younger than Sun`s at 2.855±0.514 billion years.[7] The primary star is slightly enriched by heavy elements, having 160% of solar abundance.[7]
In 2014, the co-moving binary stellar companion HD 142245 BC was detected. It consists of pair of red dwarf stars with composite spectral class M1, orbiting each other on 4 AU orbit.[4]
No other stellar companions were found at projected separations from 5.48 to 153.34 AU around HD 142245 A.[2]
Planetary system
In 2011 one superjovian planet HD 142245 A b on a mildly eccentric orbit around star HD 142245 A was discovered utilizing the radial velocity method.[8]
The HD 142245 planetary system[9]
Companion (in order from star) |
Mass |
Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
Inclination |
Radius |
HD 142245 A b |
≥1.9±0.2 MJ |
2.77±0.09 |
1299±48 |
0.32 |
— |
— |
References
- "HD 142245". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 October 2020.
- Wittrock, Justin M.; Kane, Stephen R.; Horch, Elliott P.; Howell, Steve B.; Ciardi, David R.; Everett, Mark E. (2017), "Exclusion of Stellar Companions to Exoplanet Host Stars", The Astronomical Journal, 154 (5): 184, arXiv:1709.05315, Bibcode:2017AJ....154..184W, doi:10.3847/1538-3881/aa8d69, S2CID 55789971
- 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.
- M. Mugrauer, C. Ginski, "High-contrast imaging search for stellar and substellar companions of exoplanet host stars", 2014
- Sousa, S. G.; Adibekyan, V.; Delgado-Mena, E.; Santos, N. C.; Andreasen, D. T.; Ferreira, A. C. S.; Tsantaki, M.; Barros, S. C. C.; Demangeon, O.; Israelian, G.; Faria, J. P.; Figueira, P.; Mortier, A.; Brandao, I.; Montalto, M.; Rojas-Ayala, B.; Santerne, A. (2018), "SWEET-Cat updated New homogenous spectroscopic parameters", Astronomy & Astrophysics, A58: 620, arXiv:1810.08108, Bibcode:2018A&A...620A..58S, doi:10.1051/0004-6361/201833350, S2CID 119374557
- Bonfanti, A.; Ortolani, S.; Piotto, G.; Nascimbeni, V. (2015), "Revising the ages of planet-hosting stars", Astronomy & Astrophysics, 575: A18, arXiv:1411.4302, Bibcode:2015A&A...575A..18B, doi:10.1051/0004-6361/201424951, S2CID 54555839
- Ghezzi, Luan; Montet, Benjamin T.; Johnson, John Asher (2018), "Retired a Stars Revisited: An Updated Giant Planet Occurrence Rate as a Function of Stellar Metallicity and Mass", The Astrophysical Journal, 860 (2): 109, arXiv:1804.09082, Bibcode:2018ApJ...860..109G, doi:10.3847/1538-4357/aac37c, S2CID 118969017
- John Asher Johnson; Clanton, Christian; Howard, Andrew W.; Bowler, Brendan P.; Henry, Gregory W.; Marcy, Geoffrey W.; Crepp, Justin R.; Endl, Michael; Cochran, William D.; MacQueen, Phillip J.; Wright, Jason T.; Isaacson, Howard (2011), "Retired a Stars and Their Companions. Vii. 18 New Jovian Planets", The Astrophysical Journal Supplement Series, 197 (2): 26, arXiv:1108.4205, Bibcode:2011ApJS..197...26J, doi:10.1088/0067-0049/197/2/26, S2CID 15088371
- Planet HD 142245 A b on exoplanet.eu
Serpens constellation |
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Stars (list) | |
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Star clusters | |
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Molecular clouds | |
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Nebulae | |
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Galaxies | NGC |
- 5887
- 5910
- 5911
- 5913
- 5919
- 5920
- 5921
- 5926
- 5928
- 5931
- 5936
- 5937
- 5940
- 5942
- 5941
- 5944
- 5951
- 5953
- 5954
- 5952
- 5956
- 5955
- 5957
- 5960
- 5962
- 5964
- 5970
- 5972
- 5975
- 5977
- 5980
- 5983
- 5984
- 5988
- 5991
- 5990
- 5994
- 5996
- 5997
- 6003
- 6004
- 6008
- 6006
- 6007
- 6009
- 6012
- 6010
- 6014
- 6020
- 6017
- 6018
- 6021
- 6022
- 6023
- 6027
- 6027a
- 6027b
- 6027c
- 6027d
- 6027e
- 6029
- 6033
- 6037
- 6036
- 6051
- 6063
- 6065
- 6066
- 6070
- 6080
- 6100
- 6118
- 6172
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Other | |
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Galaxy clusters | |
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Other |
- GRB 970111
- GRB 050813
- GRB 060418
- GRB 060526
- SN 2004dk
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На других языках
- [en] HD 142245
[ru] HD 142245
HD 142245 — звезда, которая находится в созвездии Змея на расстоянии около 355 световых лет от нас. Вокруг звезды обращается, как минимум, одна планета.
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