Astronomy:U Microscopii
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Short description: Star in the constellation Microscopium
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Microscopium |
| Right ascension | 20h 29m 15.77460s[2] |
| Declination | −40° 25′ 01.3084″[2] |
| Apparent magnitude (V) | 7.0 - 14.4 [3] |
| Characteristics | |
| Spectral type | M5e-M7e[4] |
| Variable type | Mira[3] |
| Astrometry | |
| Radial velocity (Rv) | −54.00[5] km/s |
| Proper motion (μ) | RA: −13.68[2] mas/yr Dec.: −24.38[2] mas/yr |
| Parallax (π) | 1.5546 ± 0.1456[6] mas |
| Distance | 2,100 ± 200 ly (640 ± 60 pc) |
| Details | |
| Luminosity | 7,900[7] L☉ |
| Temperature | 2,995[8] K |
| Other designations | |
U Microscopii, HIP 101063, HD 194814, CD−40°13888 | |
| Database references | |
| SIMBAD | data |
U Microscopii is a Mira variable star in the constellation Microscopium. It ranges from magnitude 7 to 14.4 over a period of 334 days.[4] The Astronomical Society of Southern Africa in 2003 reported that observations of U Microscopii were very urgently needed as data on its light curve was incomplete.[9]
References
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 2.2 2.3 van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics 474 (2): 653–64. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 Samus, N. N. et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1. Bibcode: 2009yCat....102025S.
- ↑ 4.0 4.1 Watson, Christopher (4 January 2010). "U Microscopii". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=19963.
- ↑ Turon, C. et al. (1993). "Version 2 of the HIPPARCOS Input Catalogue". Bull. Inf. Cent. Donnees Astron. Strasbourg 43 43: 5. Bibcode: 1993BICDS..43....5T.
- ↑ 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.
- ↑ Uttenthaler, S.; Lebzelter, T. (2010). "Correlation between technetium and lithium in a sample of oxygen-rich AGB variables". Astronomy and Astrophysics 510: A62. doi:10.1051/0004-6361/200912548. Bibcode: 2010A&A...510A..62U.
- ↑ 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): 343–357. 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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