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Details for Revision 3
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Name
  YY Sgr  
AAVSO UID
000-BFD-626 (34 observations)  
Constellation
Sagittarius Sequence
J2000.0
18 44 35.84 -19 23 23.0  (281.14933 -19.38972) Search nearby
B1950.0 18 41 38.98 -19 26 30.5
Galactic coord. 14.825 -7.258
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
AN 38.1908 ASAS J184436-1923.4 BD-19 5148
CPD-19 7051 HD 173140 HV 3080
IOMC 6288000032 PPM 234960  
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Variability type
EA
Spectral type B5+B6
Mag. range
10.02 - 10.73 V
Discoverer --
Epoch
13 Jul 2009 (HJD 2455026.2658) Ephemeris
Outburst --
Period 2.6284575 d
Rise/eclipse dur. 10%  (6.308 h)
Remarks
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1 Otero, Sebastian Alberto Min I elements in the table. Eccentric system with apsidal motion. Min II elements: HJD 2453118.005 + 2.628475 x E.
2 GCVS Team Min II 10.64; Min II = 2433075.8296 + 2.628463d*E [K.Kordylewski, SAC N29, 1958.]. Apsidal motion period is about 300 years.
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References
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1 Bob Nelson's O-C files, 2016 --
2 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
3 S.J. Williams, D.R. Gies, J.W. Helsel, R.A. Matson, S. Caballero-Nieves,
2011, arXiv:1104.3166v1 [astro-ph.SR]		 2011arXiv1104.3166W
4 S.J. Williams, D.R. Gies, J.W. Helsel, R.A. Matson, S. Caballero-Nieves,
2011, arXiv:1104.3166v1 [astro-ph.SR]		 2011arXiv1104.3166W
5 G.Pojmanski, Acta Astronomica 52, 397, 2002. 2002AcA....52..397P
6 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 1984IBVS.2489....1L
7 V.P.Zessewitsch, Odessa Izv. 4, Issue 2, 1954. --
8 H.Shapley, K.W.Keller, HB N893, 1933. 1933BHarO.893....6S
9 Dunér, N. C.; Hartwig, E.; Muller, G., 1912, Benennung von neu entdeckten
veränderlichen Sternen		 1912AN....191..341.
10 CALEB - Catalog and AtLas of Eclipsing Binaries --
External Links
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Supporting Documents
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Revision History
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5 Fernig, Leo 2022-11-15 22:34 UTC Discoverer updated from 1912AN....191..341. page 354.
4 Otero, Sebastian Alberto 2017-04-06 02:47 UTC Period and epoch from ASAS-3 data.
3 Admin, VSX 2011-04-21 01:43 UTC Update from [2011arXiv1104.3166W].
2 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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