R Pictoris
Variable star in the constellation Pictor
From Wikipedia, the free encyclopedia
R Pictoris is a semiregular variable type star in the constellation Pictor. It ranges between apparent magnitude 5.1 and 14.4, and spectral types M1IIe to M4IIe, over a period of 168 days.[3] It should be faintly visible to the naked eye of an observer with excellent observing conditions, when it is near its maximum brightness.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Pictor |
| Right ascension | 04h 46m 09.54675s[2] |
| Declination | −49° 14′ 45.0647 ″[2] |
| Apparent magnitude (V) | 6.35[2] |
| Characteristics | |
| Spectral type | M1IIe-M4IIe[3] |
| Variable type | Semiregular |
| Other designations | |
| CD−49° 1439, HD 30551, HIP 22170, SAO 216987 | |
| Database references | |
| SIMBAD | data |
In 1895, Williamina Fleming discovered that the star is a variable star.[4] In 1907 it appeared with its variable star designation, R Pictoris, in Annie Jump Cannon's Second Catalog of Variable Stars.[5]
