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Name
  V1391 Cas  
AAVSO UID
000-BNP-446 (8598 observations)  
Constellation
Cassiopeia Sequence
J2000.0
00 11 42.96 +66 11 20.8  (2.92900 +66.18911) Search nearby
B1950.0 00 09 02.43 +65 54 39.6
Galactic coord. 118.932 +3.626
Other names

(Internal only)
ASASSN-20jg Gaia20eld N Cas 2020
Nova Cas 2020 Nova Cassiopeiae 2020 PSO J001142.967+661120.789
TCP J00114297+6611190 ZTF20abpplyz  
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Variability type
NA
Spectral type --
Mag. range
10.6 V - 21.3 i
Discoverer Stanislav Aleksandrovich Korotkij and Kirill Vladimirovich Sokolovskij (New Milky Way bright transients survey)
Epoch
10 Aug 2020 (HJD 2459071.9)
Outburst 2020
Period --
Rise/eclipse dur. --
Remarks
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1 Schaefer, Brad The preliminary 3.706 hour period (and the final 3.8036 hour period published in 2021JAVSO..49...95S) cannot be correct because (1) the periodicity does not appear in simultaneous AAVSO data with amplitude limits of 0.0058 mag., (2) the periodicity does not appear in the pre-eruption TESS light curve with amplitude limits of 0.0013 mag., and (3) novae before the transition phase, including around the peak, cannot display any coherent periodicity because the opaque shell hides the inner binary.
2 Schmeer, Patrick A rapid fading caused by dust formation started on 2020 December 7 (AAVSO data, 2020ATel14267....1M).
3 Schmeer, Patrick VSP Note: 17.7 Vmag. star 5" to the N.
4 Schmeer, Patrick Galactic classical Fe II nova (2020ATel13903....1S). Prior to the eruption that was first detected on 2020 July 27, no brightenings had been recorded by the ASAS-SN Sky Patrol since 2014 December 17.
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References
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1 Schmidt, R. E., 2020, The Photometric Period of V1391 Cassiopeiae (Nova Cas
2020)		 2021JAVSO..49...95S
2 U. Munari; D. P. K. Banerjee; F. Castellani; et al., 2020, ATel #14267 2020ATel14267....1M
3 K. Sokolovsky; S. Karpov; M. Masek; et al., 2020, ATel #13904 2020ATel13904....1S
4 K. Sokolovsky; E. Aydi; L. Chomiuk; et al., 2020, ATel #13903 2020ATel13903....1S
5 R. E. Schmidt, 2020, CBET #4857 --
6 Gaia Alerts, 2020 (online data) --
7 S. Korotkiy; K. Sokolovsky; P. Schmeer; et al., 2020, CBET #4842 --
8 CBAT "Transient Object Followup Reports", 2020 (online data) --
9 Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae
(ASAS-SN) Light Curve Server v1.0		 2017PASP..129j4502K
10 Sokolovsky, K.; Korotkiy, S.; Lebedev, A., 2014, The New Milky Way: a
wide-field survey of optical transients near the Galactic plane		 2014ASPC..490..395S
11 ASAS-SN Transients (Shappee et al., 2014) 2014ApJ...788...48S
12 ZTF observations (Lasair online data) --
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Images
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Supporting Documents
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1 V1391 Cas phased plot Sep 23 2020 Schmidt, Richard 2020-09-25 04:33 UTC Phased plot differential magnitude Ic
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Revision History
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10 Otero, Sebastian Alberto 2022-04-26 18:52 UTC Type, maximum magnitude and outburst peak epoch from AAVSO data.
9 Schaefer, Brad 2021-07-14 21:43 UTC Dubious period deleted.
8 Schmeer, Patrick 2021-01-26 08:51 UTC Discoverers' full names given.
7 Schmeer, Patrick 2020-09-23 23:42 UTC Orbital period from CBET 4857.
6 Schmeer, Patrick 2020-09-23 19:31 UTC Gaia Alerts name and reference added.
5 Schmeer, Patrick 2020-09-06 11:08 UTC Primary name from CBET 4842. NMW survey reference added.
4 Otero, Sebastian Alberto 2020-08-15 01:12 UTC Maximum magnitude and outburst peak epoch from AAVSO data.
3 Schmeer, Patrick 2020-08-03 12:40 UTC Maximum magnitude from AAVSO data. ZTF designation and reference added.
2 Otero, Sebastian Alberto 2020-07-30 03:30 UTC ASAS-SN alerts identification and reference added.
1 Schmeer, Patrick 2020-07-29 21:54 UTC Position and minimum magnitude from Pan-STARRS1. Maximum magnitude from 2020ATel13904....1S. Type from 2020ATel13903....1S.

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