R Microscopii
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Microscopium |
| Right ascension | 20h 40m 02.98684s .[1] |
| Declination | −28° 47′ 31.1983″ [1] |
| Apparent magnitude (V) | 8.3-13.8 |
| Characteristics | |
| Spectral type | M4e[2] |
| Astrometry | |
| Parallax (π) | 2.54 ± 2.08[3] mas |
| Distance | approx. 1,000 ly (approx. 400 pc) |
| Other designations | |
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.[2] 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.[4] 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.[5]
References
- 1 2 SIMBAD, R Microscopii (accessed 20 March 2015)
- 1 2 Watson, Christopher (4 January 2010). "R Microscopii". AAVSO Website. American Association of Variable Star Observers. Retrieved 20 March 2015.
- ↑ van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics 474 (2): 653–64. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
- ↑ 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.
- ↑ 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.
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