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Comet C/2018 V1 (Machholz-Fujikawa-Iwamoto)

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#1 Aquarellia

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Posted 14 November 2018 - 12:07 AM

A new comet discovered by the well known visual observer Don Machholz !!!

 

More info here https://www.cloudyni...8-v1/?p=8945741

 

Early this morning (nov 14th) I observed this comet quite easily in the morning mist.

Vixen bino 126mm EP 40x CD 2 magn between +7 and +8

I will post a rapid sketch here soon.

 

Clear sky no mist to you all 

Michel


Edited by Aquarellia, 14 November 2018 - 12:08 AM.

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#2 Heidescoper

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Posted 14 November 2018 - 02:10 AM

hi all,

Michel:
fine, let´s show us Your sketches please !

Here, I wait every morning for clear skies, but ever clouds.

So I want to see what I passed.


CS
Christian

Edited by Heidescoper, 14 November 2018 - 02:11 AM.


#3 Uwe Pilz

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Posted 14 November 2018 - 02:42 AM

I observed the comet this morning with my 4 inch refractor, but the sketch not ready yet..

 

Magnitude is around 9 mag, the comet is well condensed.

 

I have some observation hints in the forum of our German association. May be it is of value of you. It is in German however, so you may need Google translator:

https://forum.vdsast...2&t=5461#p32637


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#4 Aquarellia

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Posted 14 November 2018 - 04:15 AM

Hi Uwe and Christian

 

Here's my sketch, the sky quality was really bad so i was only able to see the comet through a misty layer just before the real clouds came in.  So I detect no tail and the condensation was (for me) very very low CD 2 maybe 3.  However with those conditions nothing's certain.

The coma diameter estimation however based on my sketch gives 7'-9'.

 

C2018V1_20181114_ll.jpg

 

But once again, my observing conditions were very poor.

 

Clear sky no mist for you all

Michel


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#5 Paulius V

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Posted 14 November 2018 - 06:04 AM

Looks nice even through the mist. I hope you will get a clear view next time, Michel.

 

I wonder if tail could be seen visually in good conditions. Maybe with Swan band filter?



#6 Aquarellia

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Posted 14 November 2018 - 06:36 AM

Looks nice even through the mist. I hope you will get a clear view next time, Michel.

 

I wonder if tail could be seen visually in good conditions. Maybe with Swan band filter?

Hi Paulius

 

Indeed, if the weather will be clear I will try with the SWAN filter, this morning it was too bad.

On a photo made yesterday I saw two colors, green for the coma and strange blue in the ion tail.  Also on this picture a very small dust tail is -maybe- visible look at the bottom right:

 

http://spaceweatherg...8jvnr9n982mtmt0

 

Michel


Edited by Aquarellia, 14 November 2018 - 06:36 AM.

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#7 Uwe Pilz

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Posted 14 November 2018 - 11:54 AM

Please find appended the sketch from my observation this morning. I revised my rough sketch which i made at the scope.

 

@Michel: I find it hard to give an exact estimation of the DC value if I don't see the coma clearly. Comets at the edge of visibility tend to have a very low DC value between 0 and 2. I don't give such an estimation to the official databases, but leave the field empty.

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  • 18v1.jpg

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#8 Aquarellia

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Posted 15 November 2018 - 03:55 AM

Good suggestion Uwe, indeed for low magnitude comet views I will forget the DC !

 

Here the sketch of this morning,

 

C2018V1_20181115_ll.jpg

 

My SWAN filter helps, the contrast between the comet and the rest of the field (stars) is much better.

The sky was very dark SQM:21.32 just 1 km from home, not too bad!

Magnitude estimation +8.2 - DC 5 - coma diameter 4'

 

In the same time I saw the comet 38P, very small coma diameter 1.5' - magnitude +9 - DC NA

 

Michel


Edited by Aquarellia, 15 November 2018 - 03:58 AM.

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#9 Aquarellia

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Posted 16 November 2018 - 02:30 PM

I add here my souvenir field's (sky and earth) of my observation session.  A nice gift was conjunction of Venus and Spica near the horizon.

 

aqu-c2018v1_l.jpg

 

Clear sky to you all

Michel


Edited by Aquarellia, 17 November 2018 - 03:24 AM.

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#10 frank5817

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Posted 17 November 2018 - 02:28 AM

Michel,

 

Very fine captures by way of sketches of the pretty bright morning comet. Nice to see Venus and Spica  together in the morning sky too.. Love those souvenir paintings you do.

 

 

Frank smile.gif


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#11 Uwe Pilz

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Posted 17 November 2018 - 09:24 AM

I observed the comet this  morning again. The magnitude did not increase (as I expected), but remains around 9 mag.

 

But with a Swan Band filter a hint o a tail was visible now. I used my 4 inch refractor, the image is mirror reversed.

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  • 1811170450C!2018V1_RApo_37k.jpg

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#12 Aquarellia

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Posted 17 November 2018 - 09:45 AM

Thank you Frank, well done Uwe !



#13 Heidescoper

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Posted 17 November 2018 - 11:41 AM

hi all,

17.11.2018, 4:30 UT, SQL region 20.3mag in the Zodiakallight

7.8" Dobson, V 49x

8.1mag, DC 4, dia. 3.5`, tail 6` in PA 310°


The tail show a small long fine gastail and westside from him a bigger dust(?)tail

The swanfilter works very good, so the comet has much gas and is on images sure green coloured.


Michel:

what a nice sketch ! , I saw the conjunction by Venus&Spica too in the Zodiakkalight !


CS
Christian

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  • 20181117x2018V1CN.jpg

Edited by Heidescoper, 17 November 2018 - 11:42 AM.

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#14 Aquarellia

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Posted 19 November 2018 - 12:50 AM

This is a super view Christian!  I'm sad that this horizon is not accessible to my Mewlon.  I'm waiting for the comet Wirtanen now.

Anyway bravo!

Michel



#15 frank5817

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Posted 19 November 2018 - 10:10 PM

Uwe and Christian,

 

Nice additional sketches of this comet.

 

Frank :)




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