T Microscopii

T Microscopii
	; A visual band light curve of T Microscopii, plotted from ASAS data[1]
Observation data; Epoch J2000 Equinox J2000
Constellation	Microscopium
Right ascension	20h 27m 55.18840s[2]
Declination	−28° 15′ 39.8035″[2]
Apparent magnitude (V)	6.74 - 8.11[3]
Characteristics
Spectral type	M6-M8IIIe[3]
Variable type	SRb[3]
Astrometry
Proper motion (μ)	RA: −4.682±0.594[4] mas/yr ; Dec.: 12.562±0.433[4] mas/yr
Parallax (π)	5.1811 ± 0.3864 mas[4]
Distance	630 ± 50 ly ; (190 ± 10 pc)
Details
Radius	382[5] R☉
Luminosity	7,509[5] L☉
Surface gravity (log g)	−0.427[5] cgs
Temperature	2,750[5] K
Other designations
	T Microscopii, HIP 100935, HD 194676, SAO 189308, CD−28°16682
Database references
SIMBAD	data

T Microscopii is a semiregular variable star in the constellation Microscopium. It ranges from magnitude 6.74 to 8.11 over a period of 352 days.[3] Located around 700 light-years distant, it shines with a bolometric luminosity 7,509 times that of the Sun and has a surface temperature of 2,750 K.[5]

References

"ASAS All Star Catalogue". The All Sky Automated Survey. Retrieved 8 December 2021.
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. S2CID 18759600.
Otero, Sebastian Alberto (20 June 2011). "T Microscopii". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 March 2015.
Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. S2CID 73594365.

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[ASASServer-1] "ASAS All Star Catalogue". The All Sky Automated Survey. Retrieved 8 December 2021.

[vanLeeuwen2007-2] 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. S2CID 18759600.

[AAVSOT-3] Otero, Sebastian Alberto (20 June 2011). "T Microscopii". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 March 2015.

[Gaia-DR2-4] Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.

[Mcdonald2017-5] McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. S2CID 73594365.