HD 85390

HD 85390
HD 85390
	Star
Observational data; ( Age J2000.0 )
Type of	Single star
Right ascension
Declination
Distance	110 St. years (33.96 pc )
Visible magnitude ( V )	8.54
Constellation	Sail
Astrometry
Radial velocity ( R v )	33.09 km / s
Own movement (μ)	RA: 24.32 ; Dec: -60.59
Parallax (π)	30.89 ± 0.62 mas
Absolute magnitude (V)	5.89
Characteristics
Spectral class	K1.5V
Color Index ( B - V )	0.86
physical characteristics
Weight	0.76 M ☉
Temperature	5186 ± 54 K
Luminosity	0.43 L ☉
Metallicity	[Fe / H] = - 0.07
Other designations
	HIC 48235 , HIP 48235 , PPM 314721 , SAO 221526 , 2MASS J09500249-4947250, CD -49 4727, CPD -49 2836, SRS 1171, TYC 8189-1278-1, UBV M 15750, uvby98 100085390
Database Information
SIMBAD	data
	Sources:

HD 85390 is a star located in the constellation Parus at a distance of about 110 light-years from us. At least two planets revolve around a star.

Content

1 Features
2 Planetary system
3 notes
4 See also
5 Links

Features

HD 85390 is an orange dwarf 8.54 visible magnitude, and not visible to the naked eye ; for the first time in astronomical literature is mentioned in the catalog of Henry Draper , published at the beginning of the XX century . Its mass is 76% of the mass of the Sun. ^[1] The surface temperature is approximately 5186 Kelvin . The luminosity of a star is 43% of the solar.

Planet System

In 2009, astronomers working with the HARPS spectrograph announced the discovery of the planet HD 85390 b in the system. ^[1] It has a mass equal to 13% of the mass of Jupiter and is drawn at a distance of 1.52 AU from the parent star. A year on the planet lasts 788 days.

The second planet, HD 85390 c , was discovered in 2013 . ^[4] Its orbit lies further - at a distance of 4.23 AU The mass of the planet is 20% of the mass of Jupiter. Below is a summary table of the characteristics of both planets.

Planet	Weight ( M _J )	Radius ( R _J )	Circulation period ( days )	Semimajor axis orbits ( a.u. )	Eccentricity orbits
b	0.132	-	788.0	1,52	0.41
c	0.2	-	3700.0	4.23	-

Notes

↑ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ C. Mordasini et al. The HARPS search for southern extra-solar planets, XXIV. Companions to HD 85390, HD 90156, and HD 103197: a Neptune analog and two intermediate-mass planets . A&A (07 January 2011). Date of treatment February 9, 2014.
↑ ¹ ² ³ ⁴ ⁵ ⁶ SIMBAD (English) . - HD 85390 in the SIMBAD database . Date of treatment February 9, 2014.
↑ ¹ ² ³ ⁴ Collaboration G. Gaia DR2 - 2018 .-- Vol. 1345.
<a href=" https://wikidata.org/wiki/Track:Q51905050 "> </a>
↑ Robert A. Wittenmyer et al. Forever alone? Testing single eccentric planetary systems for multiple companions . Arxiv.org (4 Jul 2013). Date of treatment February 9, 2014.

Links

[Mordasini-1] ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ C. Mordasini et al. The HARPS search for southern extra-solar planets, XXIV. Companions to HD 85390, HD 90156, and HD 103197: a Neptune analog and two intermediate-mass planets . A&A (07 January 2011). Date of treatment February 9, 2014.

[simbad-2] ¹ ² ³ ⁴ ⁵ ⁶ SIMBAD (English) . - HD 85390 in the SIMBAD database . Date of treatment February 9, 2014.

[_5e1a0c08a30f640b-3] ¹ ² ³ ⁴ Collaboration G. Gaia DR2 - 2018 .-- Vol. 1345.
<a href=" https://wikidata.org/wiki/Track:Q51905050 "> </a>

[4] Robert A. Wittenmyer et al. Forever alone? Testing single eccentric planetary systems for multiple companions . Arxiv.org (4 Jul 2013). Date of treatment February 9, 2014.