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Name
  MM Sco  
AAVSO UID
000-BCX-137 (8298 observations)  
Constellation
Scorpius Sequence
J2000.0
17 30 45.24 -42 11 42.5  (262.68850 -42.19514) Search nearby
B1950.0 17 27 11.55 -42 09 25.6
Proper motion
RA: -3.4 +/- 4.2 mas/yDec: -33.2 +/- 4.2 mas/ySource: UCAC4
Galactic coord. 347.167 -4.526
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AAVSO 1723-42 ASASSN-V J173044.90-421144.8 Downes MM Sco
HV 6553 UCAC4 240-124548 USNO-A2.0 0450-28259213
USNO-B1.0 0478-0645553 WD J173045.24-421142.50  
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Variability type
UGSU
Spectral type cv
Mag. range
13.0 - 18.7 g
Discoverer Constance D. Boyd
Epoch
--
Outburst --
Period 0.0602 d  (86.7 min)
Rise/eclipse dur. --
Remarks
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1 Schmeer, Patrick Superoutburst cycle length ~249 d. (derived from ASAS-SN Sky Patrol data). An apparently incorrect value (~712 d.) is given in 2021MNRAS.502.5668V. Gaia DR3 parallax 2.543 ± 0.093 mas (distance 388 ± 13 pc).
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References
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1 Vogt, N.; Puebla, E. C.; Contreras-Quijada, A., 2021, Determination of the
superoutburst cycle lengths of 206 SU UMa-type dwarf novae		 2021MNRAS.502.5668V
2 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
3 T. Kato et al., 2009, arXiv:0905.1757v1 [astro-ph.SR] 2009arXiv0905.1757K
4 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
5 Ritter H.; Kolb U., 2003, Catalogue of cataclysmic binaries, low-mass X-ray
binaries and related objects (Seventh edition, update RKcat7.24, 2016)		 2003A&A...404..301R
6 Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016) 2003A&A...403..699M
7 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
8 N.Vogt, AsAp Suppl 53, N1, 21, 1983. 1983A&AS...53...21V
9 N.Vogt, F.M.Bateson, AsAp Suppl 48, N3, 383, 1982. 1982A&AS...48..383V
10 Shapley, H.; Swope, H. H., 1940, Variable stars in low galactic latitudes 1940AnHar..90..177S
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Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 17 30 45.24 -42 11 42.5 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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Campaigns/Programs
 Legacy CVs
Revision History
Currently approved revision is checked. Click revision number to view details of that revision.
5 Schmeer, Patrick 2022-05-30 16:28 UTC Gaia DR3 position. Maximum magnitude derived from ASAS-SN Sky Patrol data. Minimum magnitude from ATLAS-REFCAT2. Orbital period from 2003A&A...404..301R. Discoverer from 1940AnHar..90..177S.
4 Admin, VSX 2017-12-15 12:36 UTC Spectral type from Skiff (VizieR on-line data: B/mk)
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2009-05-14 00:46 UTC Update from [2009arXiv0905.1757K].
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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