U Microscopii

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.^[5] 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.^[10]

ConstellationMicroscopium

Right ascension20^h 29^m 15.77460^s[2]

Declination−40° 25′ 01.3084″^[2]

Apparentmagnitude(V)7.0 - 14.4 ^[3]

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U Microscopii

The visual band light curve of U Microscopii, from AAVSO data[1]
Observation data Epoch J2000      Equinox 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
Evolutionary stage	AGB[4]
Spectral type	M5e-M7e[5]
Variable type	Mira[3]
Astrometry
Radial velocity (Rv)	−54.00[6] km/s
Proper motion (μ)	RA: −13.68[2] mas/yr Dec.: −24.38[2] mas/yr
Parallax (π)	1.5546±0.1456 mas[7]
Distance	2,100 ± 200 ly (640 ± 60 pc)
Details
Luminosity	7,900[8] L☉
Temperature	2,995[9] K
Other designations
U Microscopii, HIP 101063, HD 194814, CD−40°13888
Database references
SIMBAD	data

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