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Latest Details
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Name
  SV Cyg  
AAVSO UID
000-BCK-733 (5832 observations)  
Constellation
Cygnus Sequence
J2000.0
20 09 30.09 +47 52 17.2  (302.37538 +47.87144) Search nearby
B1950.0 20 07 58.74 +47 43 23.6
Proper motion
RA: -3.161 +/- 0.043 mas/yDec: -6.014 +/- 0.041 mas/ySource: Gaia DR1
Galactic coord. 83.257 +7.975
Other names

(Internal only)
AAVSO 2006+47 ASASSN-V J200930.25+475216.9 BD+47 3031
CGCS 4714 DO 38121 HD 191738
HIP 99310 IRAS 20079+4743 IRC +50316
PPM 59403 RAFGL 2516 TYC 3563-462-1
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Variability type
SRB
Spectral type C7,4e:
Mag. range
8.5 - 9.5 V
Discoverer Thomas Espin (1886)
Epoch
25 Jun 2004 (HJD 2453182) Ephemeris
Outburst --
Period 196 d
Rise/eclipse dur. --
Remarks
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1 2020JAVSO..48...50P Other period 410 d.
2 GCVS Team VB A (B 9.5m V, 145", 140deg).
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References
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1 Percy, J. R., 2020, Period Analysis of All-Sky Automated Survey for
Supernovae (ASAS-SN) Data on a Sample of “Irregular” Pulsating Red Giants		 2020JAVSO..48...50P
2 Catalogue of Stellar Spectral Classifications (Skiff, 2009-2016) 2014yCat....102023S
3 The Hipparcos and Tycho Catalogues, Variability Annex: Periodic variables,
1997		 1997HIP...C......0E
4 Cannon, A. J., 1907, Second catalogue of variable stars 1907AnHar..55....1C
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 = 3.75H = 2.56K = 1.72J - K = 2.04
AllWISE W3 = 1.00W4 = 0.69W3 - W4 = 0.30
APASS-DR9 B = 12.58V = 8.56g' = 10.04r' = 7.40i' = 6.32B - V = 4.02
Images
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Supporting Documents
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Revision History
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6 Rodriguez, David R.V. 2023-03-22 20:24 UTC Type from 2020JAVSO..48...50P.
5 Fernig, Leo 2022-04-22 13:35 UTC Discoverer updated from 1907AnHar..55....1C page 28
4 Otero, Sebastian Alberto 2017-06-16 00:08 UTC Spectral type from Skiff (2014). Period, epoch and range from AAVSO V data.
3 Admin, VSX 2012-03-15 03:49 UTC Update from [1997HIP...C......0E].
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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