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] |
Distance | approx. 900
ly (approx. 290 pc) |
Other designations | |
Database references | |
SIMBAD | data |
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]