HD 108236

HD 108236
Observation data
Epoch J2000      Equinox ICRS
Constellation Centaurus
Right ascension 12h 26m 17.8919s
Declination −51° 21′ 46.216″
Apparent magnitude (V) 9.24
Characteristics
Evolutionary stage main sequence
Spectral type G5V
Astrometry
Radial velocity (Rv)16.91±0.15 km/s
Proper motion (μ) RA: −70.627 mas/yr
Dec.: −49.758 mas/yr
Parallax (π)15.4861±0.0127 mas
Distance210.6 ± 0.2 ly
(64.57 ± 0.05 pc)
Absolute magnitude (MV)+5.17
Details
Mass0.867+0.047
−0.046 M☉
Radius0.876±0.007 R☉
Luminosity0.707±0.032 L☉
Surface gravity (log g)4.49±0.11 cgs
Temperature5660±61 K
Metallicity [Fe/H]−0.28±0.04 dex
Age6.7+3.3
−3.4 Gyr
Other designations
CD−50 6971, HIP 60689, TOI-1233, TYC 8243-1948-1, GSC 08243-01948, 2MASS J12261789-5121462
Database references
SIMBADdata
Exoplanet Archivedata

HD 108236 is a G-type main-sequence star. Its surface temperature is 5660±61 K. HD 108236 is severely depleted in heavy elements compared to the Sun, with a metallicity Fe/H index of −0.28±0.04 (52% of the Solar System), and is probably older than the Sun at an age of 6.7+3.3
−3.4 billion years.

According to WISE mission data, the star was suspected to be surrounded by a debris disk, but a reanalysis of the data rejected the debris disk hypothesis by 2014. The reason for the false positive was contamination from a nearby infrared source.

Planetary system

HD 108236's planets

In 2020, four planets orbiting HD 108236 were discovered by the transit method, followed by another one in 2021.

The HD 108236 planetary system
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination
(°)		 Radius
b 4.23+0.41
−0.39 M🜨		 0.0451±0.0004 3.7958785+0.0000076
−0.0000070		 0.067+0.025
−0.026		 88.23±0.32 1.587±0.028 R🜨
c 8.90+0.67
−0.64 M🜨		 0.0626±0.0006 6.2036717+0.0000092
−0.0000100		 0.091+0.021
−0.033		 88.8±0.2 2.122±0.025 R🜨
d 7.75+0.91
−0.62 M🜨		 0.1087±0.0010 14.175818+0.000024
−0.000023		 0.075+0.021
−0.022		 88.8±0.1 2.629±0.031 R🜨
e 8.2+3.8
−1.2 M🜨		 0.1348±0.0012 19.5901277±0.000030 0.073+0.014
−0.017		 89.3±0.1 3.008±0.032 R🜨
f 3.95+0.46
−0.32 M🜨		 0.1773±0.0016 29.53935+0.00012
−0.00014		 0.024+0.024
−0.016		 89.07±0.03 1.89±0.04 R🜨

See also

References

  1. 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355. Bibcode:2000A&A...355L..27H.
  4. ↑ Houk, Nancy (1978). "Michigan catalogue of two-dimensional spectral types for the HD stars". Ann Arbor: Dept. Of Astronomy. Bibcode:1978mcts.book.....H.
  5. 1 2 3 Hoyer, S.; et al. (2022), "Characterization of the HD 108236 system with CHEOPS and TESS Confirmation of a fifth transiting planet", Astronomy & Astrophysics, 668: A117, arXiv:2210.08912, Bibcode:2022A&A...668A.117H, doi:10.1051/0004-6361/202243720, S2CID 252832042
  6. ↑ "HD 108236". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-17.
  7. ↑ Patel, Rahul I.; Metchev, Stanimir A.; Heinze, Aren (2014), "A Sensitive Identification of Warm Debris Disks in the Solar Neighborhood Through Precise Calibration of Saturated Wise Photometry", The Astrophysical Journal Supplement Series, 212 (1): 10, arXiv:1403.3435, Bibcode:2014ApJS..212...10P, doi:10.1088/0067-0049/212/1/10, S2CID 119219094
  8. ↑ Patel, Rahul I.; Metchev, Stanimir A.; Heinze, Aren; Trollo, Joseph (2016), "The Faintest WISE debris Disks: Enhanced Methods for Detection and Verification", The Astronomical Journal, 153 (2): 54, arXiv:1612.04818, Bibcode:2017AJ....153...54P, doi:10.3847/1538-3881/153/2/54, S2CID 3006490
  9. ↑ Daylan, Tansu; Pingle, Kartik; Wright, Jasmine; Guenther, Maximilian N.; Stassun, Keivan G.; Kane, Stephen R.; Vanderburg, Andrew; Jontof-Hutter, Daniel; Rodriguez, Joseph E.; Shporer, Avi; Huang, Chelsea; Mikal-Evans, Tom; Badenas-Agusti, Mariona; Collins, Karen A.; Rackham, Benjamin; Quinn, Sam; Cloutier, Ryan; Collins, Kevin I.; Guerra, Pere; Jensen, Eric L. N.; Kielkopf, John F.; Massey, Bob; Schwarz, Richard P.; Charbonneau, David; Lissauer, Jack J.; Irwin, Jonathan M.; Basturk, Ozgur; Fulton, Benjamin; Soubkiou, Abderahmane; et al. (2021). "TESS Discovery of a Super-Earth and Three Sub-Neptunes Hosted by the Bright, Sun-like Star HD 108236". The Astronomical Journal. 161 (2): 85. arXiv:2004.11314. Bibcode:2021AJ....161...85D. doi:10.3847/1538-3881/abd73e. S2CID 216080635.
  10. 1 2 Bonfanti, A.; Delrez, L.; Hooton, M. J.; Wilson, T. G.; Fossati, L.; Alibert, Y.; Hoyer, S.; Mustill, A. J.; Osborn, H. P.; Adibekyan, V.; Gandolfi, D.; Salmon, S.; Sousa, S. G.; Tuson, A.; Van Grootel, V.; Cabrera, J.; Nascimbeni, V.; Maxted, P. F. L.; Barros, S. C. C.; Billot, N.; Bonfils, X.; Borsato, L.; Broeg, C.; Davies, M. B.; Deleuil, M.; Demangeon, O. D. S.; Fridlund, M.; Lacedelli, G.; Lendl, M.; et al. (2021). "CHEOPS observations of the HD 108236 planetary system: A fifth planet, improved ephemerides, and planetary radii". Astronomy & Astrophysics. 646: A157. arXiv:2101.00663. Bibcode:2021A&A...646A.157B. doi:10.1051/0004-6361/202039608. S2CID 230437723.