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[1] mas |
| 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]
References
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