R Microscopii

R Microscopii
	; The visual band light curve of R Microscopii, from AAVSO data
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Microscopium
Right ascension	20h 40m 02.98684s .
Declination	−28° 47′ 31.1983″
Apparent magnitude (V)	8.3-13.8
Characteristics
Spectral type	M4e
Astrometry
Parallax (π)	1.2239±0.1089 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]

ConstellationMicroscopium

Right ascension20^h 40^m 02.98684^s .^[2]

Declination−28° 47′ 31.1983″ ^[2]

Apparentmagnitude(V)8.3-13.8

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R Microscopii

References

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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
The visual band light curve of R Microscopii, from AAVSO data^[1]
Constellation	Microscopium
Right ascension	20^h 40^m 02.98684^s .^[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
R Microscopii, HD 196717, HIP 101985, CD–29° 17235
Database references
SIMBAD	data