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]
| 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 | |
| Database references | |
| SIMBAD | data |
References
edit- ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
- ^ a b SIMBAD, R Microscopii (accessed 20 March 2015)
- ^ a b Watson, Christopher (4 January 2010). "R Microscopii". AAVSO Website. American Association of Variable Star Observers. Retrieved 20 March 2015.
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
- ^ Cooper, Tim (2003). "Presidential address: Amateur Observations - Successes and Opportunities". Monthly Notes of the Astronomical Society of Southern Africa. 62: 234–40. Bibcode:2003MNSSA..62..234C.
 | This giant-star-related article is a stub. You can help Wikipedia by expanding it. |