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New nova in delphinus

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186 replies to this topic

#176 brianb11213

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Posted 18 October 2013 - 05:08 PM

It will be interesting to see how low it will go!

Apparently the pre-outburst magnitude was around 17.1 (V) (from survey images) & since the nova outburst mechanism is essentially non destructive we should expect the nova to return to mag. 17 or thereabouts over the next year or two.

With the earlier onset of nightfall it will be possible to
keep tabs on the nova as it moves further to east with each
passing day.

Sorry I don't get it. The nova's position is becoming increasingly unfavourable until it reaches conjunction with the Sun in late January ... should still be observable to those of us in temperate northern latitudes, though, as it is around 40 degrees North of the ecliptic.

#177 Rich (RLTYS)

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Posted 19 October 2013 - 07:11 AM

Finally observed V339 Del last evening for the first time in weeks. Estimated mag 10.3 using comp stars 98 and 105.

Rich (RLTYS)

#178 nytecam

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Posted 20 October 2013 - 02:34 AM

F2.8 with the 30cm! That must be some reducer (:
PJ

Yes - Meade f/3.3 FR cranked up to f/2.8 really sucks in the photons in my very brief exposures :roflmao:

#179 BrooksObs

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Posted 20 October 2013 - 07:49 AM

It will be interesting to see how low it will go!

Apparently the pre-outburst magnitude was around 17.1 (V) (from survey images) & since the nova outburst mechanism is essentially non destructive we should expect the nova to return to mag. 17 or thereabouts over the next year or two.


Likely it will take much longer than that to fully return to near minimum. Most common novae require roughly a decade to sink back close to pre-outburst levels. Some never make it all the way back.

Odds are that V339 Del, being a moderately "fast" nova, will remain within visual reach of larger amateur telescopes for many years to come as it slowly fades.

BrooksObs

#180 MtnGoat

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Posted 23 October 2013 - 12:38 AM

I was just reading Burnhams about Nova Herc '34, a 'slow' nova. The long term light curve showed a steep drop at 100 days and a slow recovery of at least four mags to a last maximum prior to final fade.

I looked at the latest curve from AAVSO and so far it looks very similar. For the earlier nova it took about 100 days from the start of the sudden fall to hit its 2nd max.

Hmm

#181 Rich (RLTYS)

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Posted 23 October 2013 - 05:14 AM

Observed V339 Del last evening, 10/22, with my 10" refl. Using comp stars 105 and 109 I estimated its mag at 10.6.

Rich (RLTYS)

#182 MtnGoat

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Posted 29 October 2013 - 01:15 PM

It's getting pretty faint... now finding the triangle I always use for locating it is becoming important! Still not too tough visually with the 10", but it's wild to watch it fade when it used to be the brightest thing in the field. I'll miss this guy, and will be fascinated to see what it does in coming months. I'm not sure how much longer I'll have access to it, another month?

#183 canukLX90

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Posted 30 October 2013 - 02:40 AM

Image from Oct. 14
10 X 30 seconds @ ISO 800 no processing other than stacking
and cropping / modded 450D DSLR and PowerNewt @ F2.8
Still red and fading slowly

PJ

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#184 canukLX90

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Posted 02 November 2013 - 05:11 PM

My latest image from 29 October. Not showing so much of a
red hue now.

PJ

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#185 MtnGoat

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Posted 04 November 2013 - 01:18 PM

I noticed that too, last night! It seems to have happened in only a few days.

#186 old_frankland

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Posted 06 November 2013 - 01:31 AM

At 11th magnitude, it's at about the limit of what I can image in my light polluted suburban location. Bit of a challenge to rotate the camera so the 2D spectra does not cross over field stars. Doesn't appear to have changed any compared to spectra recorded about a week ago. Eventually the nebulosity lines should begin to receed.

http://www.lafterhal..._ferreira_00...

#187 MtnGoat

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Posted 25 November 2013 - 09:26 PM

I finally got another peek last Friday night. It hasn't faded as much more in nearly three weeks as I thought it would, it's still easy in the 10".

Finding the magic triangle is tougher than when I started because there is a nearly identical one right next door sharing a corner star, and that has confused me a time or two. Since the nova quit being conspicuously bright, things got a bit trickier. First I find the triangle, then I look for the line of three stars connecting one side. If I see the little dipper shape connected to that line, I know I'm there!

August 18, 2013: 20 seconds, single frame, Canon T3, 6400 ASA, prime focus on a Meade 10" SCT.

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