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Comet C/2015 V2 (Johnson)

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#101 Special Ed

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Posted 01 June 2017 - 06:36 AM

That's great, PJ!  The ion tail is easily seen in the inverted image on my monitor.  And your caveat about images is quite right.  That's why I've always felt that imaging and visual obs complement each other.

 

Thanks.  smile.gif 



#102 Special Ed

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Posted 03 June 2017 - 05:16 PM

I caught Johnson this morning in the brief half hour period between moonset and the comet disappearing behind the ridge to my west.  A dim fuzz patch with the 12x36 binoculars and much easier to see through the 9x50 finderscope on the C14.

 

m1= 8.0  DC= 3  Dia= 10-15'

 

With the C14 @ 122x the comet had a large coma with a moderately bright core and a stubby tail to the NW..  No time to make a sketch.


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#103 MarioJumanji

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Posted 11 June 2017 - 01:08 AM

I took the opportunity to look at the comet before the moon rose tonight. It seemed to me to be quite a bit fainter than the last time I was able to view it. I had a harder time spotting it than before, but it's still there.
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#104 MrMartin

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Posted 15 June 2017 - 10:59 AM

I recently started the Comet Observing Program for the Astronomical League and had Comet C/2015 V2 Johnson be my first log entry. It was more difficult to spot than on a previous viewing I did in mid May. Here is the sketch I took of it from my location which has slightly moderate light pollution on June 11.

FullSizeRender (1).jpg

Edited by MrMartin, 15 June 2017 - 11:00 AM.

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#105 Aquarellia

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Posted 16 June 2017 - 10:18 AM

Well done Martin

Here my contribution, that was june 14, the magnitude must be lower than last week, maybe 8.5 now,

C2015V2-20170614_l.jpg

Michel


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#106 andrew hampton

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Posted 16 June 2017 - 07:46 PM

I had a look at the comet on the 14th June and again tonight 17th 12.30 am local time UK, and  was surprised how diffuse it has become. Around mid May is was nicely visible in 10x50s perhaps around 7.5 magnitude.

 

At 38x in the 4" telescope I had a look at the two globulars in Ophiuchus M10 and M12 for comparison, which were much brighter. I also feel it's dipped over 8th magnitude now.

 

andrew


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#107 Special Ed

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Posted 17 June 2017 - 06:26 AM

Nice sketches and reports here.  smile.gif   Been cloudy with rain all week with more forecast--don't know when I'll get a chance to have a look.  tongue2.gif 



#108 Thomas Ashcraft

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Posted 17 June 2017 - 08:56 AM

Comet C/2015 V2 Johnson from June 15 2017. - Thomas / New Mexico

Attached Thumbnails

  • cometJohnsonv2_cn_June152017_BW_Ashcraft.png

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#109 SabiaJD

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Posted 17 June 2017 - 10:12 AM

Well done Martin

Here my contribution, that was june 14, the magnitude must be lower than last week, maybe 8.5 now,

attachicon.gifC2015V2-20170614_l.jpg

Michel

My own estimate on the June 15, 2017 UT evening, showed the comet magnitude at  8.3 in my TV101 f/5.4 at 36X from my home location.

 A few days earlier June 13, 2016 UT  I viewed C/2015 V2 at 164X with a C-11 f/10 at a darker site. Within the outer coma was a noticeable fainter condensation. 

 

John


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#110 Aquarellia

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Posted 17 June 2017 - 10:42 AM

Nice sketches and reports here.  smile.gif   Been cloudy with rain all week with more forecast--don't know when I'll get a chance to have a look.  tongue2.gif

Well, don't be sad,... we really need another brillant comet now!

Michel


Edited by Aquarellia, 17 June 2017 - 11:25 AM.


#111 Galaxy_Mike

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Posted 17 June 2017 - 11:48 AM

Interesting last night,  I was picking up the tail/gas in the 20x 80's,  and it looked large. I probably wasn't completely dark adapted while using the telescope, but I mostly got the coma in 4.5", saw little if any of the tail.

 

I thought I was picking up almost a degree of comet and tail at times in 20x 80's? 


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#112 Aquarellia

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Posted 17 June 2017 - 07:42 PM

Another interesting behavior of this observation, I just end a session for star occultation by asteroid. Then I was looking at our comet : very very close (<3') to NGC 5566, I was just able to separate the comet and the galaxy with my 152/1250mm refractor 125x. I think that our astro-photographers friends must do some lovely pictures.  I did a sketch.

Michel


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#113 Aquarellia

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Posted 18 June 2017 - 11:48 PM

Another interesting behavior of this observation, I just end a session for star occultation by asteroid. Then I was looking at our comet : very very close (<3') to NGC 5566, I was just able to separate the comet and the galaxy with my 152/1250mm refractor 125x. I think that our astro-photographers friends must do some lovely pictures.  I did a sketch.

Michel

Here sketch and full story : https://www.cloudyni...-comet-johnson/

Michel



#114 vakulenko_sergiy

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Posted 26 June 2017 - 07:05 PM

C/2015 V2 Johnson from june 15

ED80, Atik383, 10x120sec

2017 06 15 2015V2 ed80 atik383 X10

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#115 Thomas Ashcraft

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Posted 29 June 2017 - 01:50 AM

June 29 2017 0444UT 30 second single exposure ISO 25600 Telescope C14.   - Thomas / New Mexico

Attached Thumbnails

  • COMETJOHNSON_cn_10in100dpiLIGHT_30s_25600iso_+26c_20170628-22h44m26s554ms.jpg

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#116 Anduin

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Posted 28 July 2017 - 09:52 AM

July 24 2017 00:36:52 UT - C6 hyperstar f1.9 - Sao Paulo - Brazil
771aefbdfc229cea17d0c9f8df319ca6.png


Celestron Evolution 8"
Lodestar X2 Mono and ASI290mc
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