HD 28254 b

Extrasolar planet in the constellation Dorado

HD 28254 b (also known as HIP 20606 b) is an exoplanet which orbits the G-type main sequence star HD 28254, located 180 light-years away in the constellation Dorado.

Discovery

The planet was discovered in a survey by HARPS along with 29 other planets in 2009.^[1]

Properties

Due to the planet's high mass, it is assumed to be a gas giant like Jupiter. Since HD 28254 b was detected indirectly, properties such as its inclination, radius, and temperature are unknown. HD 28254 takes about 3 years to orbit its host and has one of the most eccentric orbits around a star. In 2023, the inclination and true mass of HD 28254 b were measured via astrometry, though the mass remains uncertain - it is between about 1.6 and 6.8 times the mass of Jupiter.^[2]

References

^ ^a ^b ^c Naef, Dominique; Mayor, Michel; Lo Curto, Gaspare; Bouchy, François; Lovis, Christophe; Moutou, Claire; Benz, Willy; Pepe, Francesco; Queloz, Didier; Santos, Nuno C.; Ségransan, Damien; Udry, Stéphane; Bonfils, Xavier; Delfosse, Xavier; Forveille, Thierry; Hébrard, Guillaume; Mordasini, Christoph; Perrier, Christian; Boisse, Isabelle; Sosnowska, Danuta (2010). "The HARPS Search for Southern Extrasolar Planets XXIII. 8 Planetary Companions to Low-activity Solar-type Stars". Astronomy and Astrophysics. 523: A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616. S2CID 118845989.
^ ^a ^b ^c Philipot, F.; Lagrange, A.-M.; et al. (October 2023). "A multi-technique approach to identifying and/or constraining radial-velocity substellar companions". Astronomy & Astrophysics. 678: A107. arXiv:2308.05417. Bibcode:2023A&A...678A.107P. doi:10.1051/0004-6361/202346612. S2CID 260775968.

Constellation of Dorado

Stars

Bayer	α β γ δ ε ζ η¹ η² θ κ λ ν π¹ π² G
Variable	R (P) S WZ AB BB
HR	1859 2102
HD	27274 28254 30177 33579 37836 37974 38282 269810
Other	B90 BAT99-7 BAT99-66 BAT99-68 BAT99-98 BAT99-104 BAT99-123 BI 253 Gliese 163 HE 0437-5439 HV 888 IRAS 05280–6910 LHA 120-S 79 LH 41-1042 LH 54-425 LMC195-1 MACHO 80.7443.1718 Melnick 34 Melnick 42 PSR J0523−7125 PSR J0537−6910 PSR J0540−6919 R85 R99 R136 a a1 a2 a3 b c R139 R145 SGR 0525−66 TOI-700 TOI-813 VFTS 102 VFTS 243 VFTS 352 VFTS 682 WASP-62 (Naledi) WOH G64

Exoplanets	Gliese 163 c HD 28254 b HD 30177 b TOI-700 d e TOI-813 b TOI-4127 b

Star
clusters

NGC	1712 1712 1755 1761 1763 1783 1806 1818 1820 1846 1847 1850 1852 1854/1855 1856 1858 1859 1860 1866 1868 1869 1871 1872 1873 1898 1901 1903 1910 1929 1935 1955 1969 1971 1974 1978 1983 1984 1994 1997 2001 2002 2003 2004 2027 2040 2070 2074 2100 2108 2164 2197 2241 2257
Other	Hodge 301 LH 95

Nebulae

NGC	1934 1936 2014 2020 2029 2032 2060 2078 2080
Other	Henize 70 Honeycomb Nebula N119 N11 N41 N44 N49 N55 SNR 0509-67.5 Tarantula Nebula (30)