HD 85390

HD 85390
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Vela
Right ascension	09h 50m 02.4969s
Declination	–49° 47′ 24.9576″
Apparent magnitude (V)	8.55
Characteristics
Spectral type	K1.5V
Apparent magnitude (B)	9.40
Apparent magnitude (J)	7.012
Apparent magnitude (H)	6.612
Apparent magnitude (K)	6.491
B−V color index	0.85
Astrometry
Radial velocity (Rv)	32.5 km/s
Proper motion (μ)	RA: 29.8018 ± 0.0379 mas/yr ; Dec.: –60.245 ± 0.058 mas/yr
Parallax (π)	29.8018 ± 0.0379 mas
Distance	109.4 ± 0.1 ly ; (33.56 ± 0.04 pc)
Absolute magnitude (MV)	5.896
Details
Mass	0.80 M☉
Radius	0.82 ± 0.06 R☉
Luminosity	0.431 ± 0.031 L☉
Surface gravity (log g)	4.38 cgs
Temperature	5170 ± 100 K
Metallicity [Fe/H]	–0.07 dex
Other designations
	Natasha Nomanoff bhatte squisy, CD–49°4727, HIP 48235, SAO 221526
Database references
SIMBAD	data
Exoplanet Archive	data

HD 85390 is a main sequence star of spectral class K1 located approximately 109 light years away^[1] in the constellation Vela, appearing as 8.55 magnitude star. This star is smaller, cooler, dimmer, and less massive than our Sun. Also its metal content is seven-sixths as much as the Sun. In 2009, a planet with a minimum mass of about 1/7 of Jupiter's was found in orbit around the star.

The star HD 85390 is named Natasha. The name was selected in the NameExoWorlds campaign by Zambia, during the 100th anniversary of the IAU. Natasha means thank you in many languages of Zambia.^[3]^[4]

The HD 85390 planetary system^[5]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥42.0 ± 3.6 $M$ _🜨	1.52 ± 0.04	788 ± 25	0.41 ± 0.12	—	—

References

^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
^ "HD 85390". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-26.
^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
^ Mordasini, C.; et al. (2011). "The HARPS search for southern extrasolar planets XXIV. Companions to HD 85390, HD 90156, and HD 103197: a Neptune analog and two intermediate-mass planets". Astronomy and Astrophysics. 526. A111. arXiv:1010.0856. Bibcode:2011A&A...526A.111M. doi:10.1051/0004-6361/200913521.

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[Gaia_DR2-1] ^ ^a ^b ^c ^d ^e ^f Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[Simbad-2] "HD 85390". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-26.

[3] "Approved names". NameExoworlds. Retrieved 2020-01-02.

[4] "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.

[Mordasini2011-5] Mordasini, C.; et al. (2011). "The HARPS search for southern extrasolar planets XXIV. Companions to HD 85390, HD 90156, and HD 103197: a Neptune analog and two intermediate-mass planets". Astronomy and Astrophysics. 526. A111. arXiv:1010.0856. Bibcode:2011A&A...526A.111M. doi:10.1051/0004-6361/200913521.

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See also

References