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Latest Details
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Name
  HN Cyg  
AAVSO UID
000-BCH-104 (3097 observations)  
Constellation
Cygnus Sequence
J2000.0
19 33 39.97 +28 56 14.3  (293.41654 +28.93731) Search nearby
B1950.0 19 31 40.11 +28 49 40.2
Proper motion
RA: 5.3 +/- 6.7 mas/yDec: -4.6 +/- 7.0 mas/ySource: UCAC4
Galactic coord. 63.281 +4.469
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
2MASS J19333996+2856143 AAVSO 1929+28B AN 294.1929
ASASSN-V J193339.90+285614.2 Downes HN Cyg IRAS 19316+2849
NSVS 8368758    
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Variability type
SRB
Spectral type M5-M6.5II/III
Mag. range
13.2 - 14.9 V
Discoverer --
Epoch
16 Jun 2005 (HJD 2453538.00) Ephemeris
Outburst --
Period 64.55 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto Other periods 48.23 and 111.5 d. Rather irregular. The main period is for the most recent AAVSO data. Best period for the NSVS dataset only (1999) is 73.6 d.
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References
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1 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
2 Northern Sky Variability Survey, Wozniak, P.R., et al., 2004 2004AJ....127.2436W
3 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
4 A. Bruch, T. Schimpke, 1992, A&AS 93, 419 1992A&AS...93..419B
5 A.A.Wachmann, Bergd Abh V1, N4, 1966. 1966AAHam...6..281W
6 C.Hoffmeister, Sonn Mitt N17, 1930. 1930MiSon..17....1H
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 = 7.62H = 6.70K = 6.29J - K = 1.33
AllWISE W1 = 6.05W2 = 6.00W3 = 5.32W4 = 4.62W1 - W2 = 0.04W3 - W4 = 0.70
Images
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Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2012-07-08 23:55 UTC Phase plot with AAVSO and NSVS data.
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Revision History
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4 Otero, Sebastian Alberto 2012-07-08 22:50 UTC Type, period, epoch and range from NSVS and AAVSO data. Spectral type from Skiff (2012). UCAC3 position.
3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2009-03-13 01:50 UTC Update from [1992A&AS...93..419B].
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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