Astronomy:R Microscopii
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Short description: Variable star in the constellation Microscopium
| Observation data 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[4] mas |
| 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
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 SIMBAD, R Microscopii (accessed 20 March 2015)
- ↑ 3.0 3.1 Watson, Christopher (4 January 2010). "R Microscopii". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=18705. Retrieved 20 March 2015.
- ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. 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. doi:10.1111/j.1365-2966.2012.21873.x. Bibcode: 2012MNRAS.427..343M.
- ↑ 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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