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Observing >> Variable Star Observing and Radio Astronomy

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Special Ed
Postmaster
*****

Reged: 05/18/03

Loc: Greenbrier Co., WV 38N, 80W
Re: New nova in delphinus new [Re: Nick Rose]
      #6037781 - 08/21/13 06:47 AM


I've never posted in this forum but I admire what you folks do.

At 0150 8/20 UT (9:50 PM EDT 8/19), I observed the nova through my 10x50 binoculars. Estimated mag is 5.1-5.2 as compared to eta Sge (mag 5.0). Transparency was very good but the bright Moon allowed only the stars of the Summer Triangle to be visible.


{Edit: I accidently posted this in the wrong thread the other day so I'm trying to correct that. It appears that my magnitude estimate is a liitle brighter than Rich's and John's for the same time period.]


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elleng
newbie


Reged: 07/23/13

Re: New nova in delphinus new [Re: Juan J. Gonzalez]
      #6038324 - 08/21/13 01:05 PM

Having great fun watching and recording the brightness changes. Will also send my results to the AAVSO and BAA VSS later.

I've found a nice chart for estimating the magnitude of nova DEL

http://www.freestarcharts.com/index.php/19-news-and-current-events/188-nova-d...


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BrooksObs
professor emeritus


Reged: 12/08/12

Re: New nova in delphinus new [Re: elleng]
      #6039349 - 08/21/13 11:22 PM

Looks like Nova Del 2013 is declining at a rate of between 0.2 and 0.3 magnitudes per day. I got 5.6 just about an hour ago.

BrooksObs


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Aquarellia
professor emeritus


Reged: 10/27/12

Loc: Provence, France
Re: New nova in delphinus new [Re: BrooksObs]
      #6039612 - 08/22/13 05:47 AM Attachment (30 downloads)

I agree BrooksObs
I got 5.7 at 22:10 UT aug 21st.
Here a picture made from France SW (Brax observatory)
This picture was done Aug 20, 21UT by 3 friends of mine
Michel Sarrau, Michel Lefèvre and Antoine Altura
They use an Atik Caméra (16hr) Televue refractor 101 NPIs - 570mm. Total pose 10 x 3 min

Edited by Aquarellia (08/22/13 05:48 AM)


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Rich (RLTYS)Moderator
Post Laureate
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Reged: 12/18/04

Loc: New York (Long Island)
Re: New nova in delphinus new [Re: Aquarellia]
      #6039630 - 08/22/13 06:27 AM

Observed N Del 2013 last evening (8/21) under bright, hazy skies. Estimated magnitude 5.5.

Rich (RLTYS)


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Hubert
sage


Reged: 09/26/06

Loc: Belgium
Re: New nova in delphinus new [Re: Rich (RLTYS)]
      #6039669 - 08/22/13 07:31 AM

My estimation last night was also 5.5.

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John_G
sage


Reged: 01/18/10

Re: New nova in delphinus new [Re: Hubert]
      #6039678 - 08/22/13 07:47 AM

Should be easily visible to the naked eye next week before moon rise. Even on the 24th there might be a 10 or 15 minute opportunity for viewing.

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dgg99
member


Reged: 11/07/04

Loc: Northern Spain
Re: New nova in delphinus new [Re: John_G]
      #6039685 - 08/22/13 07:56 AM

I estimated also magnitude 5.5 last night at around 22:20 UT.

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Dean Norris
Carpal Tunnel
*****

Reged: 11/05/08

Loc: Santa Cruz, Ca
Re: New nova in delphinus new [Re: dgg99]
      #6040437 - 08/22/13 04:32 PM

I estimated the nova's magnitude last night at 5.6 at 5:45 UT 8/22/13.

Here's an estimate from the 19th that i didn't get around to posting till now - 5.0 at 6:30 UT 8/19/13.

Dean


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nytecam
Postmaster


Reged: 08/20/05

Loc: London UK
Re: New nova in delphinus new [Re: Dean Norris]
      #6041232 - 08/23/13 04:49 AM Attachment (22 downloads)

My pic from last night Aug 22 through drifting cloud - my estimate mag 5.5 against circled star and Sloan DSS

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BrooksObs
professor emeritus


Reged: 12/08/12

Re: New nova in delphinus new [Re: nytecam]
      #6041428 - 08/23/13 08:46 AM

Extrapolating this morning from the near 10,000 brightness estimates reported so far to the AAVSO suggests that Nova Del's magnitude will have subsided to very near 6.0 by the time darkness falls over the U.S. this evening. The decline rate in the lightcurve's slope continues, remaining close to 0.25 magnitudes per day since August 20.10UT. Thus, it looks like Nova Del's show for the unaided eye is probably about over.

BrooksObs

Edited by BrooksObs (08/23/13 08:50 AM)


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Bakes
member


Reged: 01/06/09

Loc: Stratford, CT
Re: New nova in delphinus new [Re: BrooksObs]
      #6042578 - 08/23/13 10:00 PM

I just set up the dob in the backyard. Through the 9x50 finder, Nova Del 2013 looks like a good match with HR7839. Listed on the AAVSO chart as 6.2 mag.

But I am not the most skilled observer. What do others think?


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John_G
sage


Reged: 01/18/10

Re: New nova in delphinus new [Re: Bakes]
      #6042722 - 08/23/13 11:53 PM

Just after sunset and and a few minutes before moon rise I made and estimate of 6.0 with binoculars.

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Rich (RLTYS)Moderator
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Reged: 12/18/04

Loc: New York (Long Island)
Re: New nova in delphinus new [Re: Bakes]
      #6043130 - 08/24/13 08:02 AM

I observed N Del 2013 last evening (8/23) at mag 5.7 using comp stars 57 and 64.

Rich (RLTYS)


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VanJan
sage
*****

Reged: 07/09/08

Re: New nova in delphinus new [Re: Rich (RLTYS)]
      #6043494 - 08/24/13 12:19 PM

At 1 AM EDT on 8/24/13 with 8x42 binoculars, I estimated the magnitude at 6.0, using comparison stars of 5.9, 6.1, and 6.2.

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BrooksObs
professor emeritus


Reged: 12/08/12

Re: New nova in delphinus new [Re: VanJan]
      #6043990 - 08/24/13 05:44 PM

It is becoming ever clearer that Nova Del's rise must have been very steep for a "slow" nova. The latest data provided through the AAVSO indicates that the nova was still fainter than at least magnitude 11.0 on Aug. 13.96UT, just a day and a half prior to the nova's discovery.

Considering that the rise occurred almost immediately following the scheduled peak of the Perseid meteor shower, one thing surprises me. Given that countless amateurs must have been out documenting the meteor shower with cameras of all sorts for several nights either side of the peak, it is a bit perplexing that as yet no positive observations of the rising nova have so far been reported. Will such yet come to light, I wonder?

BrooksObs

Edited by BrooksObs (08/24/13 05:46 PM)


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Special Ed
Postmaster
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Reged: 05/18/03

Loc: Greenbrier Co., WV 38N, 80W
Re: New nova in delphinus new [Re: BrooksObs]
      #6044479 - 08/25/13 12:34 AM

Hello,

At 0200 8/25 UT using 12x36 IS II binoculars, I estimated the nova magnitude at 6.2 using nearby stars of mag 6.1, 6.4, and 5.7. The Moon had not yet risen. I also made this animation of the nova fading.


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Rich (RLTYS)Moderator
Post Laureate
*****

Reged: 12/18/04

Loc: New York (Long Island)
Re: New nova in delphinus new [Re: Special Ed]
      #6044772 - 08/25/13 08:11 AM

Observed N Del last night (8/24) and estimated its mag at 5.9 using comp stars 57 and 64.

Rich (RLTYS)


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John_G
sage


Reged: 01/18/10

Re: New nova in delphinus new [Re: Rich (RLTYS)]
      #6044816 - 08/25/13 09:08 AM

Made an estimate last night with my 8x40s. Mine was 6.1 using magnitude 61 and 62 comparison stars.

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SabiaJD
scholastic sledgehammer


Reged: 02/20/05

Loc: Clarks Summit, PA
Re: New nova in delphinus new [Re: Rich (RLTYS)]
      #6044829 - 08/25/13 09:16 AM

Observed Nova Del 2013 in early evening sky last night August 24, 2013 EDT 9:14 pm from my backyard. With dark sky condition, low humidity and cool temperature, the nova was considerable dimmer than my previous views of it.

Used the stars from AAVSO 12508BUL chart to determine the magnitude of the nova has dropped to mag 6.0.


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