HD 202259

HD 202259
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 14m 37.04960s[1]
Declination +00° 05′ 32.1167″[1]
Apparent magnitude (V) 6.39[2]
Characteristics
Spectral type M1 III[3]
U−B color index +1.937[2]
B−V color index +1.608[2]
Variable type Suspected[4]
Astrometry
Radial velocity (Rv)−123.5[3] km/s
Proper motion (μ) RA: +35.74[1] mas/yr
Dec.: –13.46[1] mas/yr
Parallax (π)3.45 ± 0.49 mas[1]
Distanceapprox. 900 ly
(approx. 290 pc)
Other designations
BD-00° 4186, HD 202259, HIP 104872, HR 8121, NSV 13614, SAO 145229.
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HD 202259 is a suspected variable star in the equatorial constellation of Aquarius. With an apparent magnitude of 6.39,[2] according to the Bortle scale it is faintly visible to the naked eye from dark rural skies. It has a stellar classification of M1 III,[3] and is a red giant located along the asymptotic giant branch of the HR diagram.[5] Located about 900 light years away,[1] its radial velocity of −123.5 km/s[3] indicates this is a high-velocity star.[6]

  1. ^ a b c d e f Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference saa0c8_59 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference ajss152_2_251 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference nsv1998 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference eggen was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference apjs71_245 was invoked but never defined (see the help page).