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Comet C/2018 Y1 (Iwamoto)

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#1 Aquarellia

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Posted 11 January 2019 - 06:20 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

 

DC (?) 3, Magn. +9 to +10

 

Clear sky to you all

 

Michel


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#2 Jon Isaacs

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Posted 11 January 2019 - 09:08 AM

Michel:

 

I want to thank you for posting your drawing and the information about C/2018 Y1. 

 

It was a clear night and I was outside observing and came inside for something warm to drink and warm up.  I decided to check Cloudy NIghts and saw you post.  Looked up the location using Sky  Safari, it was an easy star hop and I spotted it immediately.  It was brighter than I expected. 

 

It was about 25 degrees elevation the sky in that region measured about 21.1 mpsas and I was using my 22 inch.  You are about 11 degrees north of me so it never gets more than 25 degrees above the horizon, you are having to work hard. 

 

My best..

 

Jon Isaacs


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#3 Aquarellia

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Posted 11 January 2019 - 11:44 AM

Michel:

 

I want to thank you for posting your drawing and the information about C/2018 Y1. 

 

It was a clear night and I was outside observing and came inside for something warm to drink and warm up.  I decided to check Cloudy NIghts and saw you post.  Looked up the location using Sky  Safari, it was an easy star hop and I spotted it immediately.  It was brighter than I expected. 

 

It was about 25 degrees elevation the sky in that region measured about 21.1 mpsas and I was using my 22 inch.  You are about 11 degrees north of me so it never gets more than 25 degrees above the horizon, you are having to work hard. 

 

My best..

 

Jon Isaacs

You welcome Jon, and thank you for this so kind message, I really appreciate! 

This is one of the goal of CloudyNights, share information to the whole community.

 

You'r right, with my 10" (but a Mewlon...) that was quite a challenge, anyway I was unable to point out the other comet: 38P, much better placed for me during the same night.

Michel



#4 aeajr

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Posted 11 January 2019 - 01:52 PM

Was not aware of this one.

 

Looks like it never gets above the nighttime horizon for me.  At Mag 15 I likely would not be able to see it anyway. 



#5 Special Ed

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Posted 11 January 2019 - 03:43 PM

Nice observation and sketch, Michel.  smile.gif    Looks pretty small--not an easy catch.  This is one to keep an eye on, though.

 

@ Ed--Michel reported a magnitude of between 9.0 and 10.0--not 15.  If you got that off of some software, be advised that those estimates are seldom accurate (or even close).  Best to look for magnitude estimates posted by observers.


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#6 aeajr

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Posted 11 January 2019 - 04:47 PM

Thanks for the advice.  



#7 Jon Isaacs

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Posted 11 January 2019 - 08:23 PM

You welcome Jon, and thank you for this so kind message, I really appreciate! 

This is one of the goal of CloudyNights, share information to the whole community.

 

You'r right, with my 10" (but a Mewlon...) that was quite a challenge, anyway I was unable to point out the other comet: 38P, much better placed for me during the same night.

Michel

 

Michel:

 

It was an unexpected treat and  topped the evening with a delicious dessert . 

 

I was able to see 38P but it is very small,  much smaller than Y1. 

 

How about 46P ? Its no longer naked eye but I was able to detect it in my 3X Nikon Teleconverter that i use as a monocular .

 

Jon



#8 Aquarellia

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Posted 11 January 2019 - 11:50 PM

Michel:

 

It was an unexpected treat and  topped the evening with a delicious dessert . 

 

I was able to see 38P but it is very small,  much smaller than Y1. 

 

How about 46P ? Its no longer naked eye but I was able to detect it in my 3X Nikon Teleconverter that i use as a monocular .

 

Jon

 

Hi Jon

46P was still very brillant, with an important magnification (375x) I was able to detect some details in the pseudo-nucleus.

Since Machholz , that was a nice season for comets!

Michel


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#9 Aquarellia

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Posted 14 January 2019 - 04:53 AM

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.

My coma diameter estimation goes from 1.2', 5 nights ago to 4.8' today.

 

C2018Y1_20190114_l.jpg

 

This looks that that is a very active comet!

Michel


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#10 Aquarellia

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Posted 18 January 2019 - 04:40 AM

Next view, this morning while Venus and Jupiter are making a nice show dancing together.

 

C2018Y1_20190118_l.jpg

 

Magn looks not so brillant, +10 (?) and DC 4 (?) more contrasted

 

Clear sky to you all

 

Michel


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