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Name
  V1329 Cyg  
AAVSO UID
000-BCM-636 (9648 observations)  
Constellation
Cygnus Sequence
J2000.0
20 51 01.27 +35 34 53.2  (312.75529 +35.58144) Search nearby
B1950.0 20 49 02.68 +35 23 36.4
Proper motion
RA: -3.8 +/- 5.5 mas/yDec: -7.5 +/- 4.9 mas/ySource: UCAC4
Galactic coord. 77.835 -5.477
Other names

(Internal only)
AAVSO 2047+35 ASASSN-V J205101.22+353454.1  
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Variability type
NC+E
Spectral type pec
Mag. range
12.1 - 18 B
Discoverer --
Epoch
06 Sep 1934 (HJD 2427687.0) Ephemeris
Outburst 1964
Period 958.0 d
Rise/eclipse dur. --
Remarks
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1 GCVS Team In 1891 - 1964 light variations in the range 14.2m - 15.5m with deep minima to 18m; the minima are satisfied by the elements given in the Table; D = 0.1p; spectral type M [F.M.Stienon, M.R.Chartrand, C.Y. Shao, AJ 79, 47, 1974.]. In 1964 - the outburst up to 12.1m. Then gradual brightness decrease superimposed by periodical variations with an amplitude near 1m. Light minima as before are satisfied by the elements given in the Table but the character of eclipses changed (probably because of appearance of a dense envelope ejected by one of the components of the system). After the outburst high excitation emission spectrum with IR excess is observed similar to the spectrum of symbiotic variables.
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References
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1 A. Skopal, S. Shugarov, M. Vanko, P. Dubovsky, S. P. Peneva, E. Semkov, M.
Wolf, 2012, arXiv:1203.4932v1 [astro-ph.SR]		 2012arXiv1203.4932S
2 L.Hric, D.Chochol, J.Grigar, IBVS N1525, 1978. 1978IBVS.1525....1H
3 Stienon, F. M., et al., 1974, The emission-line variable HBV 475. 1974AJ.....79...47S
4 Mammano, A., Righini, G. M., 1973, The symbiotic binary V1329 Cyg = HBV 475 1973MmSAI..44...23M
5 V. P. Arhipova, O. E. Mandel, IBVS N762, 1973. 1973IBVS..762....1A
6 H. Bossen, IBVS N722, 1972. 1972IBVS..722....1B
7 N. Richter, IBVS N708, 1972. 1972IBVS..708....1R
8 L.Kohoutek, H.Bossen, ApL 6, 157, 1970. 1970ApL.....6..157K
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 = 8.17H = 7.19K = 6.75J - K = 1.41
AllWISE W1 = 6.64W2 = 6.64W3 = 6.25W4 = 5.59W1 - W2 = -0.01W3 - W4 = 0.66
APASS-DR9 B = 13.82V = 13.14g' = 13.55r' = 11.96i' = 11.34B - V = 0.68
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 20 51 01.27 +35 34 53.2 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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Revision History
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4 Otero, Sebastian Alberto 2017-06-27 05:18 UTC Outburst year added.
3 Admin, VSX 2012-03-24 01:31 UTC Update from [2012arXiv1203.4932S].
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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