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A new comet: C/2018 Y1 (Iwamoto)

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#1 Aquarellia

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Posted 11 January 2019 - 06:16 AM

You know the comet C/2018 V1 (Machholz-Fujikawa-Iwamoto), some days after the same Mr. Iwamoto has discovered this other new comet.

The comet C/2018 Y1 will reach perihelion in early February and some days after the comet will pass within 0.3 AU of the earth.  Prediction (???) +7.3.

 

Here my first sketch

 

C2018Y1_20190109_l.jpg

 

Don't hesitate to post your sketch here!

It was so difficult to retreive all information about a comet, same just here in the sketching forum... Try to retrieve 46P...

So why not to post in a single post all information related to any sketches of this comet?

 

Clear sky to you all

Michel

 

 


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#2 niteskystargazer

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Posted 11 January 2019 - 02:27 PM

Michel,

 

Nice sketch of  A new comet: C/2018 Y1 (Iwamoto) smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom


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#3 Special Ed

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Posted 11 January 2019 - 04:26 PM

Good work, Michel.  I will be happy to contribute sketches to this thread if I get the chance.  We're under a winter storm warning for the weekend but that will give the comet a chance to get closer and brighter.   lol.gif


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#4 frank5817

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Posted 12 January 2019 - 12:51 AM

Michel,

 

Very nice sketch of this visitor. 

This should be interesting as is comes in.

 

Frank :)


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#5 Heidescoper

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Posted 12 January 2019 - 01:05 AM

hi all,

Michel:
very nice sketch!
I hope to see & sketch this comet soon.

CS
Christian
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#6 Aquarellia

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Posted 14 January 2019 - 04:46 AM

Thank you Christian

 

Here the today's job

The comet is a little bit more brillant +9? still with DC 3 but the coma diameter is much more important, and not symetric.

This looks like a very active comet!

 

C2018Y1_20190114_l.jpg

 

Michel

 


Edited by Aquarellia, 14 January 2019 - 04:47 AM.

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#7 Chiron0224

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Posted 14 January 2019 - 08:38 AM

Very nice!  I'll have to try for it soon.



#8 Aquarellia

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Posted 15 January 2019 - 04:42 PM

Thank you.

As often with non periodic comet, this one looks interesting to follow.

Michel



#9 paulh83

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Posted 15 January 2019 - 11:53 PM

Very nice Michel! Thanks for sharing. 



#10 Aquarellia

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Posted 18 January 2019 - 04:35 AM

Thank you Paul, you'r welcome.

 

Here's the sketch of this morning when Venus and Jupiter are dancing together.

 

C2018Y1_20190118_l.jpg

 

I feel that the magnitude +10 (?) is slightly less brillant than Jan 14th, but DC more contrasted 4 (?)

Clear sky to you all

 

Michel

 


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#11 niteskystargazer

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Posted 18 January 2019 - 11:01 AM

Michel,

 

Nice sketch of Venus and Jupiter smile.gif .

 

CS,KLU,

 

thanx.gif ,

 

Tom



#12 Aquarellia

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Posted 11 February 2019 - 04:57 AM

Some more sketching job:

 

First the one during the moon eclipse:

 

C2018Y1_20190121_l.jpg

 

And a double sketch, one through the Mewlon 250 CRS

 

C2018Y1_20190211_M_l.jpg

 

I still feel that the coma is not symetric, it's maybe a little bit exagerated here (?)

 

And a large field view with a nice group of galaxies

 

C2018Y1_20190211_V_l.jpg

 

Clear sky to you all !


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#13 Special Ed

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Posted 11 February 2019 - 10:47 AM

waytogo.gif 



#14 astronz59

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Posted 12 February 2019 - 04:55 AM

Great observations and sketches, Michel. I have it sitting around Magnitude 7.4 at the moment. You can calculate magnitude using comparison field stars of known brightness. Here is a link to a source for a description of the method (see page 26): 

 

https://www.britastr...c (rev 4)_0.pdf


Edited by astronz59, 12 February 2019 - 04:56 AM.


#15 Aquarellia

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Posted 12 February 2019 - 07:16 AM

Great observations and sketches, Michel. I have it sitting around Magnitude 7.4 at the moment. You can calculate magnitude using comparison field stars of known brightness. Here is a link to a source for a description of the method (see page 26): 

 

https://www.britastr...c (rev 4)_0.pdf

Hi Ian, thank you for your comment and the file, I use often the Bobrovnikoff method.  During the last observation my estimate reach +6.5, lot more brillant than yours (???)

In the past I was using a link of S&T by John E. Bortle (July 15, 2006) the link is now off but I printed the method on paper, the method is fully consistent with the BAA one, that's good.

Michel


Edited by Aquarellia, 12 February 2019 - 07:16 AM.


#16 Aquarellia

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Posted 12 February 2019 - 07:20 AM

Another post is placed in the Solar observing forum

https://www.cloudyni...018-y1-iwamoto/

With other information about this interesting comet

Michel


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#17 Special Ed

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Posted 14 February 2019 - 09:56 PM

I made my first sketch of C/2018 Y1 (Iwamoto) this morning and thought I'd post it here.  Iwamoto is a fast mover--I've shown its motion over a one hour time span.  I used a SWAN filter to good effect.

 

The sketch was done at the eyepiece with 2B and HB pencils on Bristol board and is mirror reversed.  It was cold (25F/-4C) so I'm blaming any inaccuracies on that.  smile.gif

 

C_2018_Y1_Iwamoto_2019.02.14.v1.jpg


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#18 Uwe Pilz

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Posted 15 February 2019 - 12:53 AM

This morning was the last one, where one could observe the comet without the moon. I sketched it with my 16x70 binocular, and nebula filters. Magnitude was 6m7, diameter 12'.

 

Very similar to the sketch form Ed!

Attached Thumbnails

  • 1902150240C!2018~Y1~(Iwamoto)_16x70_16.jpg

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#19 astronz59

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Posted 15 February 2019 - 03:05 AM

Gentlemen,splendid observations and sketches all. Pleased to see some magnitude estimates being made. Keep up the great work! bow.gif waytogo.gif



#20 Special Ed

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Posted 15 February 2019 - 01:30 PM

Great observation and sketch, Uwe!  I like being able to validate each other's work--one of the best things about this forum.

 

Thanks for the likes and nice comments to all.  smile.gif


Edited by Special Ed, 15 February 2019 - 01:30 PM.


#21 Warmvet

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Posted 15 February 2019 - 01:49 PM

Michel, thank you for your serial sketches of the comet. It is fascinating to watch the changes occuring to the nucleus. 

Uwe and Michael, also thanks for posting your observations.

 

hoping wx will improve here soon, we actually have snow continuing to be forcasted on Haleakala

 

Cindy


Edited by Warmvet, 15 February 2019 - 01:49 PM.


#22 frank5817

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Posted 15 February 2019 - 07:20 PM

Nice sketches of the nearby comet all of you .

We have been under a spell of rain and clouds

here for several days.

 

Frank :)



#23 Heidescoper

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Posted 20 February 2019 - 02:34 PM

hi all,

here little late a sketch:

15.2.2019, 3:30 UT, region SQL 20.43 mag

7.8" Dobson, V 37x


CS
Christian

Attached Thumbnails

  • 20190215x2018Y1n.jpg

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#24 Aquarellia

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Posted 22 February 2019 - 08:49 AM

So nice details Christian!  

Bravo for this other pseudonucleus view, very similar to the details you got within Wirtanen!

whaaaaw

Michel



#25 Uwe Pilz

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Posted 24 February 2019 - 01:34 AM

Hello all,

 

yesterday I observed Iwamoto with my 12 inch dob for the first time. I made a magnitude guess a day before with binocular (7m8). I did not try to measure such a large comet with the dob.

 

Bit I made a sketch, my first with a "real" instrument. Magnification was 48x, I used a Swan badn comet fiter, whch works very fine at Iwamoto.

Attached Thumbnails

  • 1902231950C!2081~Y1(Iwamoto)_Ninja_48.jpg

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