HD 85390

HD 85390 / Natasha
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vela
Right ascension 09h 50m 02.4969s[1]
Declination –49° 47′ 24.9576″[1]
Apparent magnitude (V) 8.54[2]
Characteristics
Spectral type K1.5V[3]
Apparent magnitude (B) 9.395[2]
Apparent magnitude (J) 7.012±0.024[2]
Apparent magnitude (H) 6.612±0.033[2]
Apparent magnitude (K) 6.491±0.023[2]
B−V color index 0.855±0.003[2]
Astrometry
Radial velocity (Rv)33.03±0.20[4] km/s
Proper motion (μ) RA: 29.8018±0.0379 mas/yr[1]
Dec.: −60.245±0.058 mas/yr[1]
Parallax (π)29.8018 ± 0.0379 mas[1]
Distance109.4 ± 0.1 ly
(33.56 ± 0.04 pc)
Absolute magnitude (MV)5.99[2]
Details
Mass0.81±0.02 M☉[5]
0.813+0.043
−0.038[6] M☉
Radius0.78±0.01 R☉[5]
0.816+0.010
−0.011[6] R☉
Luminosity0.39±0.01[5] L☉
Surface gravity (log g)4.56±0.02[5] cgs
Temperature5,170±17 K[5]
5,182±20[6] K
Metallicity [Fe/H]–0.04[6] dex
Rotational velocity (v sin i)1.97±0.36[6] km/s
Age6.8±2.9 Gyr[5]
8.893+4.400
−4.017[6] Gyr
Other designations
Natasha, CD–49°4727, Gaia DR2 5406324138654973824, HD 85390, HIP 48235, SAO 221526, 2MASS J09500249-4947250[7]
Database references
SIMBADdata
Exoplanet Archivedata

HD 85390 is a star with an exoplanet companion in the southern constellation of Vela. It was given the proper name Natasha by Zambia during the 100th anniversary of the IAU. Natasha means "thank you" in many languages of Zambia.[8][9] This star is too faint to be seen with the naked eye, having an apparent visual magnitude of 8.54.[2] It is located at a distance of 109 light years from the Sun based on parallax, and is drifting further away with a radial velocity of 33 km/s.[1]

The stellar classification of HD 85390 is K1.5V,[3] showing this to be a K-type main-sequence star. It is an older star with age estimates of 7–9 billion years, and is not considered chromospherically active.[10] The star is spinning with a projected rotational velocity of 2 km/s.[6] It is smaller, cooler, dimmer, and less massive than the Sun,[5] but the metallicity is near solar.[6]

  1. ^ a b c d e Cite error: The named reference Gaia EDR3 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Anderson_Francis_2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Gray_et_al_2006 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  5. ^ a b c d e f g Cite error: The named reference Bonfanti_et_al_2016 was invoked but never defined (see the help page).
  6. ^ a b c d e f g h Cite error: The named reference Soto_Jenkins2018 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Simbad was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference nameexoworlds was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference IAU was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Mordasini2011 was invoked but never defined (see the help page).