HD 290327

HD 290327
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Orion
Right ascension	05h 23m 21.56s
Declination	–02° 16′ 39.4″
Apparent magnitude (V)	8.96
Characteristics
Spectral type	G5IV
Apparent magnitude (B)	9.69
Apparent magnitude (J)	7.683
Apparent magnitude (H)	7.404
Apparent magnitude (K)	7.271
B−V color index	0.73
Astrometry
Proper motion (μ)	RA: 34.44±1.54 mas/yr ; Dec.: −96.93±0.99 mas/yr
Parallax (π)	17.65 ± 1.57 mas
Distance	180 ± 20 ly ; (57 ± 5 pc)
Absolute magnitude (MV)	5.26
Details
Mass	0.86 ± 0.01 M☉
Radius	0.95 ± 0.02 R☉
Luminosity	0.747 ± 0.004 L☉
Surface gravity (log g)	4.41 ± 0.01 cgs
Temperature	5525 ± 20 K
Metallicity [Fe/H]	−0.11 dex
Age	11.8 ± 1.2 Gyr
Other designations
	BD−02°128, HIP 25191, PPM 175811, SAO 132049
Database references
SIMBAD	data
Exoplanet Archive	data

HD 290327 is a 9th magnitude G-type subgiant star located approximately 180 light years away in the constellation Orion. This star is larger, cooler, fainter, and less massive than our Sun. Also its metal content is seven-ninths as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.^[3]

The HD 290327 planetary system^[3]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥ 2.54+0.17 −0.14 $M$ _J	3.43+0.20 −0.12	2443+205 −117	0.08+0.08 −0.03	—	—

References

^ ^a ^b ^c ^d ^e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
^ ^a ^b ^c ^d ^e ^f Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
^ ^a ^b Naef, D.; et al. (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.

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[van_Leeuwen2007-1] van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry

[Bonfanti2015-2] ^ ^a ^b ^c ^d ^e ^f Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.

[Naef2010-3] Naef, D.; et al. (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.

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See also

References