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Name
  QW Sge  
AAVSO UID
000-BCW-969 (4074 observations)  
Constellation
Sagitta Sequence
J2000.0
19 45 49.55 +18 36 47.7  (296.45646 +18.61325) Search nearby
B1950.0 19 43 35.55 +18 29 28.4
Proper motion
RA: 112.3 +/- 7.9 mas/yDec: -56.5 +/- 7.7 mas/ySource: UCAC4
Galactic coord. 55.650 -3.023
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J19454954+1836477 AAVSO 1941+18 AS 360
ASAS J194550-1836.8 EM* AS 360 GSC 01619-01911
Gaia DR2 1824593371126624768 Gaia DR3 1824593371126624768 Hen 3-1771
IOMC 1619000050 MHA 80-5 NSV 12383
NSVS J1945496+183649 SON 8321 UCAC4 544-103021
ZTF J194549.54+183647.7    
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Variability type
ZAND
Spectral type M4-M6IIIe+WD
Mag. range
11.2 - 14.2 V
Discoverer Cuno Hoffmeister
Epoch
23 Jun 2007 (HJD 2454275) Ephemeris
Outburst --
Period 517 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto VSP Note: 13.0 Vmag. companion 5" to the N.
2 Otero, Sebastian Alberto No evidence of variability larger than 0.025 mag for the optical companion, V= 13.02, B-V= 0.54 (2024ATel16739....1M). Range has been corrected.
3 Otero, Sebastian Alberto Orbital period 390.5 d. (amplitude 1.7 mag. in B, high repeatability, reflection effect light curve) in 2002A&A...386..237M is not consistent with ASAS-3 variability. Optical companion 5" to the N (V= 13.14; B-V= 0.45; F0V in 1991A&A...249..141M and V= 12.35 (3 observations with a 0.25 mag. scatter); B-V= 0.83 in 2000A&AS..143..343H. They conclude it is also variable. The range given in the table is for the combined variations and based on AAVSO data and data in the above papers.
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References
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1 U. Munari; G. L. Righetti; A. Farina, 2024, ATel #16739 2024ATel16739....1M
2 Gaia Collaboration; et al., 2018, Gaia Data Release 2. Summary of the
contents and survey properties		 2018A&A...616A...1G
3 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
4 M. Gromadzki, J. Mikolajewska, I. Soszynski, 2013, arXiv:1312.6063
[astro-ph.SR]		 2013arXiv1312.6063G
5 J. Alfonso-Garzon, A. Domingo, J.M. Mas-Hesse, A. Gimenez, 2012,
arXiv:1210.0821 [astro-ph.IM] (online info)		 2012arXiv1210.0821A
6 P.R. Wozniak, S.J. Williams, W.T. Vestrand, V. Gupta, AJ 128, 2965, 2004 2004AJ....128.2965W
7 Munari, U.; Jurdana-Sepic, R., 2002, Symbiotic stars on Asiago archive
plates. II		 2002A&A...386..237M
8 Henden, A.; Munari, U., 2000, UBV(RI)_C photometric comparison sequences
for symbiotic stars		 2000A&AS..143..343H
9 Munari, U.; Buson, L. M., 1991, Studies of symbiotic stars. IV -
IUE-optical-IR observations of AS 360		 1991A&A...249..141M
10 D.A.Allen, Proc ASA 5,No.3,369,1984. 1984PASAu...5..369A
11 C.Hoffmeister, AN 288,49,1964. 1964AN....288...49H
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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 = 8.32H = 7.37K = 6.97J - K = 1.35
AllWISE W1 = 6.82W2 = 6.92W3 = 6.54W4 = 6.02W1 - W2 = -0.11W3 - W4 = 0.52
Images
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Supporting Documents
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Revision History
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6 Otero, Sebastian Alberto 2024-07-28 05:31 UTC Minimum magnitude (corrected) from ASAS-SN data.
5 Otero, Sebastian Alberto 2020-05-15 00:46 UTC Gaia DR2 position.
4 Otero, Sebastian Alberto 2012-10-02 23:13 UTC Reference and remark added.
3 Otero, Sebastian Alberto 2012-10-02 23:10 UTC Period and epoch from ASAS-3 data. Range from AAVSO, ASAS-3 and literature data. Spectral type from Skiff (2012). UCAC4 position.
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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