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HD 108236

Coordinates: Sky map 12h 26m 17.8916s, −51° 21′ 46.2141″
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HD 108236
Observation data
Epoch J2000      Equinox J2000
Constellation Centaurus
Right ascension 12h 26m 17.8916s[1]
Declination −51° 21′ 46.2141″[1]
Apparent magnitude (V) 9.24
Characteristics
Evolutionary stage main-sequence star
Spectral type G5V
Astrometry
Radial velocity (Rv)16.78±0.22[2] km/s
Proper motion (μ) RA: −70.627[2] mas/yr
Dec.: −49.758[2] mas/yr
Parallax (π)15.4861 ± 0.0127 mas[2]
Distance210.6 ± 0.2 ly
(64.57 ± 0.05 pc)
Details[3]
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[1]
Database references
SIMBADdata

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.[3]

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.[4] The reason for the false positive was contamination from a nearby infrared source.[5]

Planetary system

[edit]
HD 108236's planets

In 2020, four planets orbiting HD 108236 were discovered[6] by the transit method, followed by another one in 2021.[7]

The HD 108236 planetary system[3][7]
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

[edit]

References

[edit]
  1. ^ a b c "HD 108236". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-01-17.
  2. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. ^ a b c 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
  4. ^ 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
  5. ^ 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
  6. ^ 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.
  7. ^ a b 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.