TCP J00114297+6611190: Galactic classical Fe II nova (13 mag) in Cassiopeia

Association Francaise des Observateurs d'Etoiles Variables (AFOEV)
Wed, 07/29/2020 - 15:42

Nova Cassiopeiae 2020 = TCP J00114297+6611190 (N)

Coordinates (J2000.0): R.A. 00 11 42.96 Decl. +66 11 20.8
Discoverers: Stanislav Korotkij and Kirill Sokolovskij

For details see:

Further spectroscopy and multiband photometry are encouraged.

Clear skies,

American Association of Variable Star Observers (AAVSO)
N Cas 2020 - AAVSO Alert Notice 715

AAVSO Alert Notice 715 reports on N Cas 2020 = TCP J00114297+6611190. Please see the notice for details, observations, and observing instructions.

Many thanks, and Good observing,

Elizabeth O. Waagen, AAVSO HQ

American Association of Variable Star Observers (AAVSO)
Visual observers still in line ?


Did you still take the data from visual observers in your system ?

Or maybe it's because my "Comment code" was "U", because I don't see my early observations of this nova in your report ?

Could you clarify, just let me know, I don't need any correction ...


Thank you for your help anyway

Michel (DMIB)

American Association of Variable Star Observers (AAVSO)
A secondary peak?

The V-band data shows an initial peak around JD 2459072, then a decline for about five days, and then a second small rise for another four days.  It may have started to decline again -- the data isn't clear yet.

This seems a bit unusual for a nova, but I don't deal with them very often.  Would an expert care to comment?


American Association of Variable Star Observers (AAVSO)
Spectrum on 18 August

I have just submitted a low res (R ~ 600) spectrum taken last week. Hopefully available after validation

on database soon.

Kevin (GKEA)


American Association of Variable Star Observers (AAVSO)
A few remarks

Hi all!

I have a few nights time series of Nova Cas: 12"F4 newton, Atik314L+ and johnson-V filter (made by Baader). Baader photometric v-filter have some difficulties in the case of Nova observations, leaking Ha, as it came out in case of Nova Del 2013:

And this nova is not different, it has quite big Ha spike:…; So my data is a little brighter than it should be. I'm sorry about that.

   i like time series and always look to see if there are any possible unknown variables, and  yes, this time it looks like there is four candidate (AAVSO chart X25611AGR, FOW = 30'):

1:Comp. star 126 (USNO-A2 1500-00215803)  Mean amplitude 0.013mag, period 2.49h

2:USNO-A2 1500-00239533 (near by "companion" of  comp. star 130) Mean amplitude 0.018mag, period 2.45h

3:USNO-A2 1500-00257228  Mean amplitude 0.007mag, period 1.92h

4: 112 (TYC 4026-29-1) seems to have mean amplitude 0.015mag, and period some 4.8d - too little data yet to make accurate determination.

     i think those potential variables ( 112 in particular) change so little that they have no effect on the Nova measurement results, the covered the measurement noise. Much more of my measurements are distorted by the Baader filter - should get a better filter.

Timo (KTU)

American Association of Variable Star Observers (AAVSO)
Comp stars, Baader filter

Your findings about comp stars (I use 126 as comp and 112 as ckeck) could explain a fluctuations in my check star (112) from night to night relative to 126!

I also use Baader V filer so probably this causes that my last observations look brighter than others...

Does the relative intensity of Halpha evolve? The observations I made couple weeks ago look more consistent with others...



Bundesdeutsche Arbeitsgemeinschaft fur Veranderliche Sterne e.V.(Germany) (BAV)
Oscillations - what drives them?


There is a kind of oscillation with 8 days period visible.

Based on the classificationschem from Strope, Shaefer, Henden (The Astronomical Journal, 140:34-62, 2010) this could fit into several classes like J, O., but I find it difficult to decide. For O class, the oscillations start early and for J they seem to be too regular.

Any ideas? Does anyone know more about the origin of those oscillations? Repeating thermonuclear events of pulsation driven or...?