K2-28

K2-28
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius[1]
Right ascension 22h 22m 29.8611s[2]
Declination −07° 57′ 19.853″[2]
Apparent magnitude (V) 16.06[3]
Characteristics
Spectral type M4V[4][5]
Apparent magnitude (J) 11.695±0.030[6]
Apparent magnitude (H) 11.028±0.023[6]
Apparent magnitude (K) 10.746±0.023[6]
Variable type Planetary transit variable[4]
Astrometry
Radial velocity (Rv)11.7[5] km/s
Proper motion (μ) RA: −254.604(41)[2] mas/yr
Dec.: −194.554(30)[2] mas/yr
Parallax (π)15.8734 ± 0.0343 mas[2]
Distance205.5 ± 0.4 ly
(63.0 ± 0.1 pc)
Details[4]
Mass0.257±0.048 M☉
Radius0.288±0.028 R☉
Surface gravity (log g)4.93±0.04 cgs
Temperature3214±60 K
Metallicity [Fe/H]0.26±0.10 dex
Other designations
Gaia DR2 2622296783699476864, LP 700-6, NLTT 53655, EPIC 206318379[7]
Database references
SIMBADdata

K2-28 is a metal rich M4-type main sequence star. One confirmed transiting exoplanet is known to orbit this star. There is another star 5.2 arcseconds to the north–east of K2-28. However, this star has a different proper motion, and is therefore physically unrelated and probably a background star.[4]

  1. ^ Cite error: The named reference Roman1987 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Gaia EDR3 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Chen2018 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Hirano2016 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Dressing2017 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Skrutskie2006 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).