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Latest Details
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Name
  DF Vul  
AAVSO UID
000-BFP-779 (8 observations)  
Constellation
Vulpecula Sequence
J2000.0
19 57 56.95 +22 40 56.0  (299.48729 +22.68222) Search nearby
B1950.0 19 55 47.67 +22 32 48.7
Proper motion
RA: -41.4 +/- 6.3 mas/yDec: -39.6 +/- 6.3 mas/ySource: UCAC4
Galactic coord. 60.603 -3.390
Other names

(Internal only)
2MASS J19575694+2240557 AN 149.1905 ASAS J195757+2240.8
ASASSN-V J195756.94+224055.1 NSVS 11284904 NSVS 8403575
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Variability type
M
Spectral type M8
Mag. range
12.1 - <16.9 V
Discoverer --
Epoch
14 Jul 2008 (HJD 2454662) Ephemeris
Outburst --
Period 342 d
Rise/eclipse dur. --
Remarks
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1 Otero, Sebastian Alberto VSP Note: 13.3 mag. star 11" to the SSW and 15.9 mag. star 17" to the SE.
2 Otero, Sebastian Alberto NSVS and ASAS-3 magnitudes contaminated by GSC 02141-00800 (V= 13.33; sep. 11") and 2MASS J19575770+2240432 (V= 15.94; sep. 17"). NSVS magnitudes also contaminated by other nearby stars. Range has been corrected.
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References
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1 Wozniak, P.R., et al., 2004, Northern Sky Variability Survey: Public Data
Release
2004AJ....127.2436W
2 Pojmanski, G., 2002, The All Sky Automated Survey 2002AcA....52..397P
3 M.U.G.Wolf, AN 170, 361, 1906. 1906AN....170..361W
4 General Catalogue of Variable Stars, 4th Edition, Volumes I-III, P.N.
Kholopov et al.
--
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 = 6.12H = 5.08K = 4.51J - K = 1.60
AllWISE W1 = 4.60W2 = 3.92W3 = 3.43W4 = 2.84W1 - W2 = 0.68W3 - W4 = 0.58
Images
Please review Digitized Sky Survey Acknowledgment and Copyright.
Size 5' x 5' (297 x 298 pixels)
Center 19 57 56.95 +22 40 56.0 (J2000)
Source STScI
Survey

Red, all sky, 1.0 arcsec/pixel
  Negative
Supporting Documents
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1 Phase plot Otero, Sebastian Alberto 2014-03-31 21:43 UTC Phase plot with ASAS-3 and NSVS data.
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Revision History
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4 Otero, Sebastian Alberto 2014-03-31 21:40 UTC Period, epoch and range from ASAS-3 and NSVS data. UCAC4 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.