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Latest Details
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Name
  V0930 Cyg  
AAVSO UID
000-BCH-403 (23832 observations)  
Constellation
Cygnus Sequence
J2000.0
19 39 06.72 +30 28 50.7  (294.77800 +30.48075) Search nearby
B1950.0 19 37 08.73 +30 21 55.2
Proper motion
RA: -10.0 +/- 0.5 mas/yDec: -13.6 +/- 0.5 mas/ySource: UCAC4
Galactic coord. 65.210 +4.180
Other names

(Internal only)
2MASS J19390673+3028508 AAVSO 1935+30 ASASSN-V J193906.66+302850.2
ATO J294.7781+30.4808 GSC 02656-04142 Gaia DR2 2032512978480605312
Gaia DR3 2032512978480605312 HBV 358 IRAS 19371+3021
TIC 70014973 ZTF J193906.70+302850.4  
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Variability type
SRB
Spectral type M
Mag. range
10.9 - 13.1 V
Discoverer A. A. Wachmann
Epoch
31 Jul 2015 (HJD 2457235.0) Ephemeris
Outburst --
Period 252.8 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Other period 135 d.
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References
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1 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive
2019PASP..131a8003M
2 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0
2017PASP..129j4502K
3 A.A.Wachmann, Bergd Abh 6, N3, 1964. --
External Links
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Location    Go   
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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 = 4.63H = 3.62K = 3.06J - K = 1.56
AllWISE W3 = 2.36W4 = 1.87W3 - W4 = 0.49
APASS-DR9 B = 14.04V = 12.26g' = 13.24r' = 10.66i' = 7.63B - V = 1.77
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 19 39 06.72 +30 28 50.7 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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1 Phase plot Kolb, Matthias 2025-07-30 16:49 UTC Phase plot with AAVSO Vis data (1973-2025)
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Revision History
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4 Kolb, Matthias 2025-07-30 16:49 UTC Period, epoch and minimum magnitude from AAVSO data (1973-2025).
3 Otero, Sebastian Alberto 2025-06-23 21:32 UTC Type, period and epoch from ZTF data. Range from ASAS-SN data. Gaia DR3 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.