HD 108236

	HD 108236
Sterrebeeld	Sentour
Spektraaltipe	G5V
Soort	Hoofreeksster
	Waarnemingsdata (Epog J2000)
Regte klimming	12h 26m 17.8916s
Deklinasie	-51° 21′ 46.2141″
Skynmagnitude (m)	9,24
	Besonderhede
Massa (M☉)	0,869+0,050−0,048=
Radius (R☉)	0,877±0,008
Ligsterkte (L☉)	0,708±0,047
Ouderdom (jaar)	6,7+4,0−5,1 miljard
Temperatuur (K)	5 660±61
Afstand (ligjaar)	210
Metaalinhoud [Fe/H]	-0,28±0,04
	Ander name
	CD -50 6971, 2MASS J12261789-5121462, TYC 8243-1948-1, HIP 60689, GSC 08243-01948, TOI 1233
Portaal	Sterrekunde

HD 108236 is a G-tipe hoofreeksster sowat 210 ligjare van die Son af. Sy oppervlaktemperatuur is 5 660±61 K. HD 108236 het min metale in vergelyking met die Son, met ’n metaalinhoud van -0,28±0,04 (52% van die Son s'n), en is moontlik ouer as die Son: 6,7+4,0−5,1 miljard jaar.^[2]

Volgens WISE-sendingdata is verwag die ster sou deur ’n puinskyf omring wees, maar met ’n herontleding van die data is dié hipotese in 2014 weerlê.^[3] Die rede vir die valse inligting was besoedeling deur ’n nabygeleë infrarooibron.^[4]

Planeetstelsel

In 2020 is vier planete om HD 108236 deur die oorgangsmetode ontdek^[5] en nog een in 2021.^[2]

Die HD 108236-stelsel^[2]^[5]
Planeet of skyf (vanaf ster)	Massa	Halwe lengteas (AE)	Wentelperiode (dae)	Baanhelling (°)	Radius
b	4,2±1,2 M_⊕	0,0469±0,0017	3,79523+0,00047−0,00044	—	1,586±0,098 R_⊕
c	9±2 M_⊕	0,0651±0,0024	6,2037+0,00064−0,00052	—	2,068+0,10−0,091 R_⊕
d	7,8+3,2−1,8 M_⊕	0,1131±0,004	14,1756+0,001−0,0011	—	2,72±0,11 R_⊕
e	8,4+6,6−1,4 M_⊕	0,14±0,0052	19,592±0,002	—	3,12+0,13−0,12 R_⊕
f	4+2−1 M_⊕	0,1759	29,54	—	2,0172+0,052−0,057 R_⊕

Verwysings

↑ ^1,0 ^1,1 ^1,2 HD 108236 by Simbad, Besoek op 1 Februarie 2021
↑ ^2,0 ^2,1 ^2,2 ^2,3 Bonfanti, A.; Delrez, L.; Hooton, M. J.; Wilson, T. G.; Fossati, L.; Alibert, Y.; Hoyer, S.; Mustill, A. J. et al. (2021). "CHEOPS observations of the HD 108236 planetary system: A fifth planet, improved ephemerides, and planetary radii".
↑ 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, doi:10.1088/0067-0049/212/1/10, Bibcode: 2014ApJS..212...10P
↑ 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, doi:10.3847/1538-3881/153/2/54, Bibcode: 2017AJ....153...54P
↑ ^5,0 ^5,1 Daylan, Tansu; Pingle, Kartik; Wright, Jasmine; Guenther, Maximilian N.; Stassun, Keivan G.; Kane, Stephen R.; Vanderburg, Andrew; Jontof-Hutter, Daniel et al. (2020). "TESS discovery of a super-Earth and three sub-Neptunes hosted by the bright, Sun-like star HD 108236".

Skakels

Hierdie artikel is in sy geheel of gedeeltelik uit die Engelse Wikipedia vertaal.

[SIMBAD-1] 1,0 ^1,1 ^1,2 HD 108236 by Simbad, Besoek op 1 Februarie 2021

[Bonfanti2021-2] 2,0 ^2,1 ^2,2 ^2,3 Bonfanti, A.; Delrez, L.; Hooton, M. J.; Wilson, T. G.; Fossati, L.; Alibert, Y.; Hoyer, S.; Mustill, A. J. et al. (2021). "CHEOPS observations of the HD 108236 planetary system: A fifth planet, improved ephemerides, and planetary radii".

[3] 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, doi:10.1088/0067-0049/212/1/10, Bibcode: 2014ApJS..212...10P

[4] 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, doi:10.3847/1538-3881/153/2/54, Bibcode: 2017AJ....153...54P

[Daylan2020-5] 5,0 ^5,1 Daylan, Tansu; Pingle, Kartik; Wright, Jasmine; Guenther, Maximilian N.; Stassun, Keivan G.; Kane, Stephen R.; Vanderburg, Andrew; Jontof-Hutter, Daniel et al. (2020). "TESS discovery of a super-Earth and three sub-Neptunes hosted by the bright, Sun-like star HD 108236".

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