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Comet C/2007 N3 (Lulin)

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Author Topic: Comet C/2007 N3 (Lulin)  (Read 15383 times)
martinastro
Martin Mc Kenna
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« Reply #285 on: March 15, 2009, 10:48:48 pm »

Thanks for the latest Lulin images, visual obs and sketches Tyler and Roman.
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martinastro
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« Reply #286 on: March 17, 2009, 12:41:09 am »

The sky cleared late this evening leaving a sky like soup with poor trans and only the brighter stars visible. I took the scope out to find Lulin, I didn't know exactly where it was so I just did a search through Gemini and eventually picked it up at 23.00 UT. The coma was smaller and grey although still moderately condensed with a small bright condensation. No tail seen due to the trans. The comet looked nice in the same field as a bright star. Good to see Lulin again but it really is the shadow of its former self. Still, it looks nice and reminds me of C/1999 T1 McNaught without the tails.
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« Reply #287 on: March 17, 2009, 02:06:43 pm »

Some detailed info about penumral eclipse of C/2007N3:

http://www.marmet.org/louis/lulin2009/index.html
(Louis Marmet)

Nobody observed it because he magnitude drop was... below 0.01m.  Grin
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Roman White
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« Reply #288 on: March 17, 2009, 08:30:48 pm »

I have updated the light curve of C/2007N3


Comet is 1 magnitude brighter than predicted in MPC  Smiley
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Roman White
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« Reply #289 on: March 18, 2009, 11:03:07 pm »

Tonight I had an absolutely unexpected little bit of clear skies, therefore I tried to see the comet but the results are quite disapponiting.
I'm just back from the observing session (22:50-23:35 EET). The sky was almost clear but the transparency was below average (haze, little fog), the comet was already lower (35*SW) and unfortunately in an area where the LP increased to moderate. ML 10.5. I had only a few glimpses of a 'ghost' (as Martin said), with averted vision, of course. Absolutely impossible to make any estimates, just only a 'guesstimate' of 7.5~8.0m. Then the clouds arrived in SW at 23:35.
Now I can only hope to get good clear skies and catch a comet while it will be higher...  Undecided
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« Reply #290 on: March 23, 2009, 12:38:42 am »

Hi guys! Tonight I had a short but fantastic observing session!   Cool Pity it's Monday now already and I have no time, I'll try to post a report next evening.
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« Reply #291 on: March 23, 2009, 02:54:27 pm »

Good job Roman. Keep us updated when you get the chance. I'm hoping for clear skies this evening to try for the new comet again.
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« Reply #292 on: March 23, 2009, 11:08:40 pm »

On Mar.22/23 night I had another (6th or 5th) observing session of this comet.

The sky had cleared only after 11PM, so the comet was already low above the horizon. But the sky transparency was surprisingly good: ~7-8/10, nothing like this since autumn. In my light polluted skies I could see many stars in Coma Berenices, the NELM was definitely above 5.5m, which was good enough (I never had 6.0m or more because of the city skies).

Actually, it wasn't a normal observing session, I was testing a 'magic goodie'.  Cool
I saw the comet which surprised me alot!  Smiley (the comet was below 20o altitude in moderate LP area).

Started at 23:45 EET (while messing up with new instrument), found the comet at ~00:05 EET, next it took much time to make a sketch (I'll post it later), finished at 01:00 EET. I should stay for more but needed to wake up early in the morning (ugh, the clear skies almost never occurs on weekend Angry )

It was just a 'faint fuzzie', absolutely different from one we had in February.
8 mag was faint enough to me (in not very good conditions), but with averted vision I seen it a bit more enchanced for a while. ML=10.5
Estimates:
C/2007N3 (Lulin): 2009 Mar.22.95 UT: m1=7.8:, dia.=&6', DC=2, no tails, 20x90B
[altitude 15*; moderate light pollution, Bortle class 5/6; good transparency]

------------ --------- --------- ----
*ICQ format*
   2007N3  2009 03 22.95  S  7.8:TK  9.0B 5  20 & 6    2            ICQ
------------ --------- --------- ----

A small offtopic: some meteor activity was present. Have seen one +3m meteor in Aur (at 23:21, flying N to S, unknown radiant: AVB, VIR, CUR,...?) and two telescopic meteors of 6-9m. The second one (9m) was the faintest meteor which I observed to the date, and it passed directly in front of the comet!  Cheesy
« Last Edit: March 23, 2009, 11:44:30 pm by Roman White » Report Spam   Logged

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« Reply #293 on: March 23, 2009, 11:30:23 pm »

Tried to look at the comet tonight at 20:00-20:25 EET (with a telescope).
The sky transparecy was poor and quickly decreased (ML~10.3 (max) ... down to 8m).
Glimpsed for a few seconds a barely visible (with averted vision) diffuse patch of light, though I even don't call it an observation.

(P.S. The pressure is falling here today, now it is 728mmHg rel = 736mmHg abs. I'm waiting for a snowfall tonight or tomorrow)
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« Reply #294 on: March 25, 2009, 11:15:25 am »

Great shots guys!!! Got a few myself one night, a bit late in posting but here you go...





Camera: Nikon D300
Exposure: 10
Aperture: f/1.8
Focal Length: 50 mm
ISO Speed: 2000
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Thanks,
         Steven..

Visit my Blog http://steviesskyshack.blogspot.com

Visit my Flickr  http://www.flickriver.com/photos/16671294@N07/
Roman White
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« Reply #295 on: March 25, 2009, 09:26:54 pm »

Superb, Steven!  Smiley It is faint already and you caught it!

P.S. Maybe there is no need to sign it in those shots... Roll Eyes
« Last Edit: March 25, 2009, 09:28:58 pm by Roman White » Report Spam   Logged

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« Reply #296 on: March 26, 2009, 11:26:30 am »

Thanks Roman, I have the text on the image as it was posted on my blog for people to know what they are looking at... Just haven't removed it... Cheesy
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Thanks,
         Steven..

Visit my Blog http://steviesskyshack.blogspot.com

Visit my Flickr  http://www.flickriver.com/photos/16671294@N07/
Roman White
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« Reply #297 on: April 02, 2009, 06:00:17 pm »

I searched for this comet yesterday (Apr.01, 21:45-22:10 EEST) at Poltava gravimetric observatory with 20cm refractor.
The Moon was also in Gemini, only 9o away from the comet, anyway I tried


- in 15x45 binoculars and 8x80 guide: not visible

- in 200/3000mm refractor: at magnification ~55x not visible, however the stellar ML was 11.9m. I was unable to correctly defocus stars, but the comet was definetly below 8.5mag.

C/2007N3 (Lulin):
2009 Apr.01.80 UT: m1=[9.0:, 20cm f/15 refractor
[altitude 33*; moonlight interference; city light pollution]
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« Reply #298 on: April 02, 2009, 09:36:02 pm »

I haven't seen it since the last dark period but even then it was unimpressive. No doubt it's diffuse nature, fading mag, and the growing Moon will prevent detection for a while. I have my eye on Cardinal now.  Smiley
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« Reply #299 on: April 10, 2009, 08:59:49 pm »

Comet N3 Lulin with an amazing deepsky background by David Kodama
http://www.eanet.com/kodama/astro/2009/0328/
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