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New nova in delphinus

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#1 Hubert

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Posted 14 August 2013 - 04:21 PM

There's a new nova in Delphinus

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

Just visualy observed it and estimated it 6.5. AAVSO chart 12506UL

Compstars 62 and 70.

Easy visible in 8x42 bino.

#2 ZielkeNightsky

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Posted 14 August 2013 - 04:24 PM

Just observed it, my guees is around 6.2 . 8x50 bino

#3 John Gauvreau

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Posted 14 August 2013 - 08:55 PM

Just observed with 8x42 Atlas Radian bonoculars and Oberwerk 15x70 at 9:55pmEDT, and I would estimate maybe 5.7-5.8
Very nice and easy to find.

#4 Aaron Turner

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Posted 14 August 2013 - 09:19 PM

10:20 EDT. 20x80 binoculars. Bit shaky (too much yard work today) without the tripod. I'd estimate between 6.2 and 5.7 based on nearby known stars.

#5 PGW Steve

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Posted 14 August 2013 - 11:45 PM

Strange.....I just went to the RA/DEC on the CBAT site, plate solved it to within seconds, and shot an exposure, there is nothing showing in the field of the reported magnitude....I must find this thing!!!

GOT IT!!!!! Topocentric vs J2000 issue.

#6 Achernar

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Posted 15 August 2013 - 01:18 AM

I think it's possibly brigther than magnitude +5.7, given that I quite probably saw it with the unaided eye between passing bnads of clouds just now. I was looking from my driveway in Mobile, which is heavily light polluted.

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#7 Joe F Gafford

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Posted 15 August 2013 - 02:07 AM

I agree it is closer to mag 5.7. It seems to match nearby Hip 100754 at mag 5.8 with 7x50 binos. An image of the area with annotations taken 11-3-1996 with the Mamiya RZ camera with the 110mm F/2.8 lens wide open for 22 minutes on the Kodak PPF 400 film. Small area of the negative taken in the Delphinus area. 5 deg horizontal, north up.

Joe

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#8 Hubert

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Posted 15 August 2013 - 03:14 AM

My observation at the beginning of the evening was 6.5 but it clearly was getting brighter by the hour. The latest observations are around 5.5

#9 Rich (RLTYS)

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Posted 15 August 2013 - 05:00 AM

Unfortunetly I just found out about it this morning (8/15). Hope to observe it tonight.

Rich (RLTYS)

#10 RobK

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Posted 15 August 2013 - 05:52 AM

CBET has now been issued - CBET 3628 : 20130815 : NOVA DELPHINI 2013 = PNV J20233073+2046041. Cloudy here...

Cheers -

Rob

#11 John Gauvreau

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Posted 15 August 2013 - 07:17 AM

Yeah, I looked again before I went to bed last night, a little over 2 hours after my first observation and I estimated it at 5.6-5.7 (12:15amEDT) so I would agree with Hubert that it is getting brighter. I'm looking forward to seeing it tonight!

#12 BrooksObs

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Posted 15 August 2013 - 10:10 AM

Available data from this morning indicates that the nova is currently probably peaking in brightness at magnitude 5.5-5.6 . This suggests that it should still be around this range tonight when darkness returns to the Americas.

I would note that it is a rare thing to actually view a nova when precisely at maximum, most of them being discovered some days (sometimes weeks) after they have peaked and they are fading.

It will prove interesting to see just what type of nova this new object will be, fast, normal, or slow. HR Del 1967 was situated about 10 degrees to the SE of the new nova's position. It was a very slow nova, remaining near maximum for a couple of months! However, its rise to maximum was much slower and its amplitude less than seems to be the case with the new object.

BrooksObs

#13 elleng

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Posted 15 August 2013 - 10:49 AM

Looking forward to glimpsing this one.

I found a link with a good pdf chart

http://www.freestarc...s/186-bright...

#14 jmandell

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Posted 15 August 2013 - 10:54 AM

Sweet! I have been thinking about getting into dslr photometry, and I now have a target tonight. It will be my first time doing anything of the sort, so I'll probably mess up, but I have to take the leap some time.

#15 Herr General

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Posted 15 August 2013 - 12:02 PM

I tried finding it with a 12" last night, but I couldn't conclusively identify it (though I'm sure I passed over it a few times). I chalked it up to the 12" "cluttering" the field with a lot of insignificant background stars and my own inexperience with star hopping- since it's apparently brighter tonight, I'll try again with binoculars or my 6" and see if I have better luck.

#16 PGW Steve

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Posted 15 August 2013 - 12:24 PM

I managed to get it with the 14", and my FSQ. A friend of mine was shooting with a 105mm lens on a 60D and it shows up well, we can pick out the small circular asterism right next to it.

17.5'x13.3' FOV

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#17 Dean Norris

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Posted 15 August 2013 - 02:38 PM

I first found the nova in 7x50 binos ( 8/15/13, 6 UT) and then observed it in my 10" newt. When comparing it to the star Hip 100754 it did seem slightly brighter. Though Hip 100754 is orange in color with the nova being yellow in tone. I'm assuming the orange tone looks less bright than a star that's yellow of the same magnitude. Anyway I would estimate it's brightness as 5.6 approx. Using my 20mm 100* ep 1.3afov, I was able to get both stars in the same fov. Moving the scope enabled me to see NGC 6905 and the nova in same fov. I'll check it out tonight weather permitting. It was great getting the news yesterday and being able to find it last night. This forum is great! Thanks to Hubert for the timely post.

Dean

#18 BrooksObs

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Posted 15 August 2013 - 03:24 PM

UP DATE - Although Nova Del seemed to have leveled off in brightness at 5.5-5.6 overnight for the western hemisphere, a new group of reported sightings centered around 19h UT today suggests a further rise may be in progress. The mean of these data puts the nova's brightness at closer to 5.0 . Be sure to check the nova this evening as soon as it gets dark.

BrooksObs

#19 Bruce MacDonald

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Posted 15 August 2013 - 04:29 PM

Congratulations to Koichi Itagaki, the discoverer. Need to get out and observe it soon.

#20 Juan J. Gonzalez

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Posted 15 August 2013 - 04:35 PM

My last measure from Spain gives me about 4.8 mag.

PNV J20233073+2046041 20130815.858 4.77R 0.04 4 CMC

-Juanjo

#21 Hubert

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Posted 15 August 2013 - 04:37 PM

Hello, I just observed ( 20.45 UT ) it again and had it visually at 5.1. This is also confirmed by photometry.

That is 1.4 magnitude brighter in 24 hours. Keep on watching it!

#22 Hubert

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Posted 15 August 2013 - 04:40 PM

I have made a AAVSO chart for those who want to use it.

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#23 Bruce MacDonald

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Posted 15 August 2013 - 04:49 PM

No chance here - clouded out and heavy rain due overnight. Maybe some clear spells tomorrow evening.

Thanks for the chart Hubert - very helpful.

#24 Keith g

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Posted 15 August 2013 - 06:35 PM

Shot taken at 2306UT August 15th, I estimate it now at magnitude 4.8, it's still rising and easy to see naked eye now.

www.flickr.com/photos/79652716@N00/9518001289/lightbox/

Keith.

#25 Otto Piechowski

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Posted 15 August 2013 - 08:36 PM

I am at the eyepiece right now. It is brighter than the 4.8 mag in the finder fog and fainter than the 3.5 in the finder fog. I would estimate magnitude 4.5.

Lexington, KY USA 9:36 pm edst






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