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Name
  V2491 Cyg  
AAVSO UID
000-BFT-191 (2166 observations)  
Constellation
Cygnus Sequence
J2000.0
19 43 01.98 +32 19 13.5  (295.75825 +32.32042) Search nearby
B1950.0 19 41 06.32 +32 12 01.7
Galactic coord. 67.229 +4.353
Other names

(Internal only)
1RXS J194259.9+321940 2RXP J194302.0+321912 GSC2.3 N2GS067091
Gaia DR3 2033300327537067264 USNO-B1.0 1223-0482965 VSX J194301.9+321913
XMMSL1 J194301.9+321911 ZTF19aaprvxv  
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Variability type
NA
Spectral type pec(Nova)
Mag. range
7.5 - 18.9 V
Discoverer Koichi Nishiyama and Fujio Kabashima
Epoch
11 Apr 2008 (HJD 2454568)
Outburst 2008
Period --
Rise/eclipse dur. --
Remarks
Some references may be clicked to view in new window. Roll over index number to view submission details.
1 Otero, Sebastian Alberto Period 0.0958 d reported in 2008ATel.1514....1B was just flickering. It might be either a (nearby) severely underluminous and very unusual classical nova or a (distant) U Sco-class recurrent nova (2011A&A...530A..70D). No period detected in ZTF data (vsnet-chat 9427).
2 Otero, Sebastian Alberto VSP Note: 20.4 Vmag. star 2.2" to the N, 17.2 Vmag. star 4.5" to the ESE and 15.2 Vmag. star 8" to the N.
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References
Click reference title/citation to view in new window. Roll over index number to view submission details.
1 T. Kato, 2023, vsnet-chat #9427 --
2 Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing,
Products, and Archive
2019PASP..131a8003M
3 Samus, N. N.; Kazarovets, E. V.; Durlevich, O. V.; et al., 2017, General
Catalogue of Variable Stars: Version GCVS 5.1 (November 2019)
2017ARep...61...80S
4 Darnley, M. J.; et al., 2011, On the progenitor system of Nova V2491 Cygni 2011A&A...530A..70D
5 R.J. Strope, B.E. Schaefer, A.A. Henden, 2010, arXiv:1004.3698v1
[astro-ph.SR]
2010arXiv1004.3698S
6 K.L. Page et al., 2009, arXiv:0909.1501v1 [astro-ph.HE] 2009arXiv0909.1501P
7 IAU Circular No. 8934 2008IAUC.8934....1N
8 Baklanov, A.; Pavlenko, E.; Berezina, E., 2008, ATel #1514 2008ATel.1514....1B
9 AAVSO Special Notice #103 --
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Images
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Supporting Documents
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Campaigns/Programs
 BAA VSS Recurrent Objects Programme
Revision History
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7 Otero, Sebastian Alberto 2025-05-20 19:45 UTC Minimum magnitude derived from ZTF data.
6 Otero, Sebastian Alberto 2020-05-24 18:42 UTC Epoch from the GCVS (November 2019 version).
5 Admin, VSX 2010-04-29 00:57 UTC Update from [2010arXiv1004.3698S].
4 Admin, VSX 2010-01-05 04:43 UTC Update from the GCVS version of November 2009.
3 Admin, VSX 2009-09-10 12:54 UTC Update from [2009arXiv0909.1501P].
2 Otero, Sebastian Alberto 2008-04-12 06:19 UTC Updated primary name to assigned GCVS designation.
Maximum V-magnitude and type given.
1 Waagen, Elizabeth O. 2008-04-12 06:13 UTC Initial submission.