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Name
  NSVS 8520304  
AAVSO UID
000-BLV-533 (No observations)  
Constellation
Cygnus Sequence
J2000.0
20 37 35.81 +36 50 38.0  (309.39920 +36.84390) Search nearby
B1950.0 20 35 40.82 +36 40 05.4
Proper motion
RA: -8.7 +/- 3.5 mas/yDec: -5.2 +/- 4.0 mas/ySource: UCAC4
Galactic coord. 77.152 -2.568
Other names

(Internal only)
2MASS J20373580+3650380 ASASSN-V J203735.71+365038.5 CGCS 4921
DO 19211 GSC 02698-00819 IRAS 20356+3640
IRC+40436 MSB 71 MSX6C G077.1516-02.5686
RAFGL 5526S UCAC4 635-097830 URAT1 635-448243
USNO-B1.0 1268-0460360 ZTF J203735.81+365038.0  
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Variability type
SRA
Spectral type C5,5
Mag. range
13.543 (0.966) g
Discoverer Ivan Sergey,Sebastian Otero, Dubrovski Sergei, Astrobloknot Team
Epoch
23 Aug 1999 (HJD 2451414.00000) Ephemeris
Outburst --
Period 441.8231829 d
Rise/eclipse dur. --
Remarks
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1 Sergey, Ivan J-K= 2.21. NSVS magnitudes contaminated by GSC 02698-00195 (V= 12.9; sep. 20"). Range has been corrected.
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References
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1 ZTF Catalog of Periodic Variable Stars (online data) 2020arXiv200508662C
2 Chen, X.; et al., 2020, The Zwicky Transient Facility Catalog of Periodic
Variable Stars		 2020arXiv200508662C
3 Northern Sky Variability Survey, Wozniak, P.R., et al., 2004 2004AJ....127.2436W
External Links
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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 = 4.58H = 3.47K = 2.37J - K = 2.21
AllWISE W3 = 1.24W4 = 0.76W3 - W4 = 0.48
SDSS-DR12 u = 14.71g = 15.34r = 12.33i = 11.79z = 7.17u - g = -0.64r - i = 0.55
Images
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Supporting Documents
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1 Photometric curve Sergey, Ivan 2016-01-12 15:21 UTC
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Revision History
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2 Otero, Sebastian Alberto 2021-10-26 05:56 UTC Update from 2020arXiv200508662C. Gaia EDR3 position.
1 Sergey, Ivan 2016-01-12 20:04 UTC Initial submission.

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