HD 190984

HD 190984
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Pavo
Right ascension	20h 11m 30.716s
Declination	–64° 37′ 13.69″
Apparent magnitude (V)	8.76
Characteristics
Spectral type	F8V
Apparent magnitude (B)	9.27
Apparent magnitude (J)	7.671
Apparent magnitude (H)	7.389
Apparent magnitude (K)	7.319
B−V color index	0.579
Astrometry
Radial velocity (Rv)	20.2 km/s
Proper motion (μ)	RA: 0.68 ± 0.73 mas/yr ; Dec.: 44.57 ± 0.81 mas/yr
Parallax (π)	9.8 ± 2.6 mas
Distance	approx. 330 ly ; (approx. 100 pc)
Absolute magnitude (MV)	3.71
Details
Mass	0.91 M☉
Radius	1.53 R☉
Luminosity	2.69 L☉
Surface gravity (log g)	4.02 ± 0.22 cgs
Temperature	5988 ± 25 K
Metallicity	-0.48 ± 0.06
Rotation	23 days
Rotational velocity (v sin i)	3.4 km/s
Other designations
	CD–64°1271, HIP 99496, PPM 364454
Database references
SIMBAD	data
Exoplanet Archive	data
Extrasolar Planets; Encyclopaedia	data

HD 190984 is a 9th magnitude F-type main sequence star located approximately 330 light years away in the constellation Pavo. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content is one-thirds as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.

The HD 190984 planetary system^[2]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥3.1 M_J	5.5	4885 ± 1600	0.57 ± 0.10	—	—

References[]

^ ^a ^b ^c ^d 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. S2CID 18759600. Vizier catalog entry
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Santos, Nuno C.; Mayor, Michel; Benz, Willy; Bouchy, François; et al. (2010). "The HARPS Search for Southern Extra-solar Planets XXI. Three New Giant Planets Orbiting the Metal-poor Stars HD 5388, HD 181720, and HD 190984". Astronomy and Astrophysics. 512 (A47): A47. arXiv:0912.3216. Bibcode:2010A&A...512A..47S. doi:10.1051/0004-6361/200913489. S2CID 118675798.

Coordinates: 20^h 11^m 30.7166^s, −64° 37′ 13.694″

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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. S2CID 18759600. Vizier catalog entry

[santos2010-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m Santos, Nuno C.; Mayor, Michel; Benz, Willy; Bouchy, François; et al. (2010). "The HARPS Search for Southern Extra-solar Planets XXI. Three New Giant Planets Orbiting the Metal-poor Stars HD 5388, HD 181720, and HD 190984". Astronomy and Astrophysics. 512 (A47): A47. arXiv:0912.3216. Bibcode:2010A&A...512A..47S. doi:10.1051/0004-6361/200913489. S2CID 118675798.

[1]

[2]

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Pavo
Right ascension	20^h 11^m 30.716^s^[1]
Declination	–64° 37′ 13.69″^[1]
Apparent magnitude (V)	8.76^[2]
Characteristics
Spectral type	F8V^[2]
Apparent magnitude (B)	9.27
Apparent magnitude (J)	7.671
Apparent magnitude (H)	7.389
Apparent magnitude (K)	7.319
B−V color index	0.579^[2]
Astrometry

Radial velocity (R_v)	20.2 km/s
Proper motion (μ)	RA: 0.68 ± 0.73^[1] mas/yr Dec.: 44.57 ± 0.81^[1] mas/yr
Parallax (π)	9.8 ± 2.6^[2] mas
Distance	approx. 330 ly (approx. 100 pc)
Absolute magnitude (M_V)	3.71^[2]

Details

Mass	0.91^[2] `M`_☉
Radius	1.53^[2] `R`_☉
Luminosity	2.69^[2] `L`_☉
Surface gravity (log g)	4.02 ± 0.22^[2] cgs
Temperature	5988 ± 25^[2] K
Metallicity	-0.48 ± 0.06^[2]
Rotation	23 days
Rotational velocity (v sin i)	3.4^[2] km/s

Other designations
CD–64°1271, HIP 99496, PPM 364454
Database references
SIMBAD	data
Exoplanet Archive	data
Extrasolar Planets Encyclopaedia	data

HD 190984

See also[]

References[]