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  AU Mic  
000-BCW-379 (No observations)  
Microscopium Sequence
20 45 09.53 -31 20 27.2  (311.28971 -31.34089) Search nearby
B1950.0 20 42 03.84 -31 31 05.5
Proper motion
RA: 281.376 +/- 0.069 mas/yDec: -360.112 +/- 0.043 mas/ySource: Gaia DR1
Galactic coord. 12.655 -36.802
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J204509.4-312023 AAVSO 2039-31 ASAS J204509-3120.3
ASAS J204509-3120.5 ASAS J204510-3120.4 ASAS J204510-3120.5
CD-31 17815 CPD-31 6335 GJ 803
GJ 803.0 HD 197481 HIP 102409
IRAS 20420-3131 SAO 212402  
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Variability type
Spectral type M1Ve
Mag. range
8.56 - 8.73 V
Discoverer --
04 Nov 1975 (HJD 2442720.75) Ephemeris
Outburst --
Period 4.85 d
Rise/eclipse dur. --
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Hinzel, David H. Part of a triple hierarchical system with AT Mic AB.
2 Admin, VSX Member of the Beta Pictoris association.
3 Admin, VSX AU Mic = IRAS 20420-3131, per B. Skiff, private communication, 02 Sep 2006. Cross-id transmitted to SIMBAD for inclusion.
4 GCVS Team mu alpha = +0.0212S, mu delta = -0.348" (mu, pi, Vr - common with AT Mic). SB? 0.20P <= M - m <= 0.55P. There are periodical light variations and also flares with A <= 0.5m U [I.C.Busko, C.A.O.Torres, AsAp 64, 153, 1978.].
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Click reference title/citation to view in new window. Roll over index number to view submission details.
1 Messina, S.; et al., 2016, The triple system AT Mic AB +AU Mic in the B
Pictoris Association
2 M. Kiraga, 2012, Acta Astronomica 62, 67 2012AcA....62...67K
3 S. Messina, S. Desidera, M. Tutatto, A.C. Lanzafame, E.F. Guinan, 2010, A&A
520, A15
4 M. Kiraga, K. Stepien, 2007, Acta Astronomica 57, 149 2007AcA....57..149K
5 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
6 C.A.O.Torres, S.Ferraz Mello, G.R. Quast, ApL 11, 13, 1972. 1972ApL....11...13T
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 5.44H = 4.83K = 4.53J - K = 0.91
Please review Digitized Sky Survey Acknowledgment and Copyright.
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Supporting Documents
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Revision History
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5 Hinzel, David H. 2017-08-02 16:48 UTC Multiplicity information from 2016Ap&SS.361..291M. Range form ASAS-3 data.
4 Admin, VSX 2012-04-19 21:08 UTC Update from [2012AcA....62...67K].
3 Admin, VSX 2011-12-22 21:36 UTC Update from [2010A&A...520A..15M].
2 Admin, VSX 2009-04-06 20:45 UTC Update from [2007AcA....57..149K ].
1 Admin, VSX 2005-12-17 20:33 UTC Initial upload.