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New nova

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#1 norden

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Posted 15 August 2013 - 01:22 AM

Discovered by Koichi Itagaki, Yamagata, Japan, using 0.18-m reflector + unfiltered CCD. This Nova was confirmed on the frames taken on August 14.750 UT using 0.60-m f/5.7 reflector + unfiltered CCD after discovery. Then CCD magnitude is 6.3.

http://www.cbat.eps....73 2046041.html

Mikael Anderlund

#2 Sasa

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Posted 15 August 2013 - 04:27 PM

Just saw it with 8x40. It is even brighter now, my estimate from 20:30UT is V=5.0. I could barely glimpse it with my eyes from my backyard.

#3 JonnyH

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Posted 15 August 2013 - 04:42 PM

What did I see? I observed a very bright flash and shortly after another lesser flash. I was perplexed...this morning I read about the nova in the same location. No has reported what I saw on the web. Is it even possible that I witnessed such massive explosions from the nova? I've been meteor shower watching lately...it wasn't one of those.

#4 GlennLeDrew

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Posted 15 August 2013 - 04:52 PM

Johnny,
Novae do not 'flash' (and certainly not on and off) on scales of a second. Brightness changes of significance are far more gradual, measuring in minutes (or hours) while brightness increases immediately after the detonation. A brief flash in the sky is most commonly from a satellite or meteor.

#5 JonnyH

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Posted 15 August 2013 - 05:24 PM

I know those things to be true that's why it defies me. There was no movement to the event. My first skeptical thought was satellite or aircraft but the second bright flash was in the same location less than 10 seconds later. At first my brain said Supernova but then I thought "no way"
So while I understand why your comment is accurate I still know what I saw. I learned of the nova this morning when looking for explanations to the event. Still scratching my head for a good explanation.

#6 Peter Natscher

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Posted 15 August 2013 - 06:52 PM

Here's a link to the sky map showing exact nova location for observing with your binoc's.

http://www.universet...you-can-see-...

#7 AstroTatDad

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Posted 15 August 2013 - 09:27 PM

Need some help from those that have seen it in a 8" scope. I did a sketch of it last night, but got a few comments saying it was not it, that was posted above the Nova. Please check out my sketch and report here http://www.cloudynig...6028062/page...

#8 PJ Anway

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Posted 16 August 2013 - 06:12 AM

Jonny,

Perhaps it was an Iridium flare, they can look like you describe. Here is some info on them:

Iridium Flare

#9 rinalmj

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Posted 16 August 2013 - 07:45 AM

I saw a couple flashes last night and see them regularly. There are several causes that I know of: planes, fireworks (even very distant), flaring (from gas wells or plants), and lightning (again, even very distant)

#10 Special Ed  Happy Birthday!

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Posted 16 August 2013 - 08:24 AM

Jonny,

Perhaps it was an Iridium flare, they can look like you describe. Here is some info on them:

Iridium Flare


PJ is on to something here. I saw an iridium flare last night (9:32 PM EDT) go right through the Sagitta/Delphinus/Vulpecula area where the nova is located. Depending on Jonny's location, he may have seen it, too.

I located the nova last night after the iridium flare happened. I estimated its magnitude at ~4.9 at 0230 UT on 16 August by comparing it to Eta Sge and 29 Vul. Report and sketch here.

#11 Jeremy Perez

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Posted 16 August 2013 - 09:48 AM

The nova was a straightforward, naked eye catch last night from my back yard. I was pretty wiped out & ready for bed when I went out to give it a shot, so I neglected to estimate magnitude. Nice to see the sketch with NGC 6905, Michael!

#12 Special Ed  Happy Birthday!

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Posted 16 August 2013 - 10:43 AM

Thanks, Jeremy. Hope you get a chance to revisit with a higher energy level. :) I think forecast conditions here tonight will allow me a chance to see if I can spot it with the unaided eye.

#13 EJN

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Posted 16 August 2013 - 12:07 PM

This is an image I took last night with my Canon S5, constellation lines
added to Delphinus & the nova is arrowed.

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#14 okieav8r

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Posted 16 August 2013 - 02:51 PM

I'm headed up to my folk's farm this afternoon, and hope to get a look at it tonight.

#15 nytecam

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Posted 16 August 2013 - 04:13 PM

My lo-res spectrum of Nova Del [blue] in late dusk tonight with Altair spectrum [grey] for reference - note the weak Halpha and Hbeta in emission characteristic of a nova at outburst. Halpha should become dominant over the next week or so :grin:

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#16 nytecam

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Posted 16 August 2013 - 06:51 PM

My pic of nova fov - on Sloan DSS a faint ~m18 blue star seems centred on the nova :grin:

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#17 Cotts

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Posted 16 August 2013 - 09:22 PM

I just caught it a few minutes ago in 15x70 binos. The limiting magnitude is about 3.5 here with Albireo barely visible and all the stars in Delphinus invisible naked eye. Seems about mag 4.0-4.5 in the binos and I have no doubt that folks can see it naked eye from darker skies....

Time of observation was 2013 08 17, 02h15m, UT

I'm going to take the 6" out to have a go to see its colour, if any....

Back soon...

Dave

#18 greenglass

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Posted 16 August 2013 - 09:36 PM

in 7x50s it looks pale yellow

#19 blb

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Posted 16 August 2013 - 09:44 PM

I just caught it a few minutes ago in 15x70 binos. The limiting magnitude is about 3.5 here with Albireo barely visible and all the stars in Delphinus invisible naked eye. Seems about mag 4.0-4.5 in the binos and I have no doubt that folks can see it naked eye from darker skies....

Time of observation was 2013 08 17, 02h15m, UT

Way to go Dave, I too just came in from looking with my 10x50 binoculars. The limiting magnitude is about 3.5-4.0 here with Albireo barely visible and all the stars in Delphinus and Sagitta invisible to the naked eye. Remembering the approximate location and armed with my S&T Pocket Sky Atlas, I sat down in a chair in the back yard and started picking out the stars in the atlas. Having located the field of the nova, there was a bright star where none was shown in the atlas. Comparing this star to the magnitudes shown on the finder chart in Peter Natscher's above post, I would estimate the magnitude to be between 5.0-5.3, and the limiting magnitude for my binoculars was about 7.0 to maybe a little fainter.
Time of observation was 2013 08 17, 02h21m, UT

#20 Cotts

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Posted 16 August 2013 - 09:54 PM

Colour report. No question it is a very pale yellow. Not nearly as orange as Gamma Sge, (Mag 3.5, color index +1.56), nearby. It is distinctly yellower than Alpha Del (Mag 3.77, CI -0.04). Although too faint, for a true comparison, I think the nova is about as yellow-white as Altair (mag 0.93, CI +0.27). It seems to be about the same as Beta Del as well (mag3.63, CI +0.45).

6" MakNewt, using 50x, 100x and 130x. 2013 08 17, 02h 30m UT

#21 Cotts

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Posted 16 August 2013 - 10:01 PM

As for magnitude, there is an AAVSO chart that shows the star nearest to the nova to be 5.7 mag and the nova clearly has nearly a magnitude on it. Estimated Delta mag, (as if it were a wide double star) would be 0.7 mags. The nova is not as bright as the 5 main stars of Delphinus, the faintest of which, Epsilon Del, is mag 4.03. Eta Sge is mag 5.09 and is very similar to the nova.

Fun to be on the cusp of things...
Dave

Edit: Light curve....

Looks like it has peaked and is dimming past mag 5 this evening....

Dave

#22 Special Ed  Happy Birthday!

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Posted 17 August 2013 - 02:03 AM

Observed Nova Del 2013 at 0530 UT (8/17) through clouds with my 12x36 IS II's. The nova appeared about as bright as 29 Vul (4.8) which bumps it up 0.1m from last night. I guess the increase in magnitude has slowed way down.

#23 Robert Cook

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Posted 18 August 2013 - 01:36 AM

Observed Nova Del 2013 at 0530 UT (8/17) through clouds with my 12x36 IS II's. The nova appeared about as bright as 29 Vul (4.8) which bumps it up 0.1m from last night.


I agree, it appears just about as bright as 29 Vul...maybe a smidgen less, if anything. Its yellow coloration is pale but unmistakable in my 7x35 (old school) binocular.

#24 Rutilus

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Posted 18 August 2013 - 02:25 AM

Friday night (16th), inspite of moonlight, Nova was detactable as a naked eye object. Saturday (17th),
stronger moonlight, however the Nova was still visible to the naked eye.
With the telescope, colouration noted as off-white/pale yellow.

#25 Tyranthrax

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Posted 18 August 2013 - 02:41 AM

Is this it? I had a hard time following the instructions out there. namely because I am not sure with my diagonal to go left or right. What I did was went to eta sagitta, sao 105659 went hunting wsw and this was the brightest thing there in the area. I think it looked more yellowish orange than this photo shows. this look right to you guys though?

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