R Microscopii
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| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Microscopium |
| Right ascension | 20h 40m 02.98684s .[2] |
| Declination | −28° 47′ 31.1983″ [2] |
| Apparent magnitude (V) | 8.3-13.8 |
| Characteristics | |
| Spectral type | M4e[3] |
| Astrometry | |
| Parallax (π) | 1.2239±0.1089 mas[4] |
| Distance | 2,700 ± 200 ly (820 ± 70 pc) |
| Other designations | |
| R Microscopii, HD 196717, HIP 101985, CD–29° 17235 | |
| Database references | |
| SIMBAD | data |
R Microscopii is a star in the constellation Microscopium. It is a red giant star of spectral type M4e that is also a Mira variable, with an apparent magnitude ranging between 8.3 and 13.8 over 138 days.[3] Located around 1000 light-years distant, it shines with a luminosity 444 times that of the Sun and has a surface temperature of 3141 K.[5] The Astronomical Society of Southern Africa in 2003 reported that observations of R Microscopii were urgently needed as data on its light curve was incomplete.[6]
References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b SIMBAD, R Microscopii (accessed 20 March 2015)
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR2 record for this source at VizieR.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
