Mystery Object

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Mystery Object

Postby Aratus » Sat Dec 01, 2018 6:36 pm

While taking a wide field view of Comet Wirtenan, I spotted an interest looking fuzzy on the same shot. I stacked 10 images and it looked even more fuzzy. (See arrow)
Image

I thought it was a distant galaxy, but it isn't on any chart. (It seems rather large not to be)
However, when I zoomed in I got a bit of a shock. I've not seen anything like this before.
Image

Has anyone come across anything like this before - or have an explanation for it?
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
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Re: Mystery Object

Postby Gfamily2 » Sat Dec 01, 2018 9:32 pm

Aratus wrote:While taking a wide field view of Comet Wirtenan, I spotted an interest looking fuzzy on the same shot. I stacked 10 images and it looked even more fuzzy. (See arrow)
Image

I thought it was a distant galaxy, but it isn't on any chart. (It seems rather large not to be)
However, when I zoomed in I got a bit of a shock. I've not seen anything like this before.
Image

Has anyone come across anything like this before - or have an explanation for it?

Have you tried platesolving with Astrometry.net. upload the image and it should be able to locate its position and give you an overlay with catalogued objects.
Scopes: Meade 8" SCT, Skywatcher 127mm Mak, Raffle winner of SW ST80
For imaging: Pentax K5, Asda webcam, Star Adventurer (new toy)
For companionship: Mid Cheshire Astronomical Group.
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Re: Mystery Object

Postby Gfamily2 » Sat Dec 01, 2018 9:36 pm

Do you know the id of the bright star next to 46P?
Scopes: Meade 8" SCT, Skywatcher 127mm Mak, Raffle winner of SW ST80
For imaging: Pentax K5, Asda webcam, Star Adventurer (new toy)
For companionship: Mid Cheshire Astronomical Group.
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Re: Mystery Object

Postby Aratus » Sat Dec 01, 2018 10:17 pm

It is only a 6th magnitude star. The ID is HIP 11907 or SAO 167878 or HD 15996 depending on the catalogue used.
The J2000 co-ordinates of that star are . . .
RA: 2h 33m 40.2s
DEC: -20°0m 7.0s

The J2000 co-ordinates of the mysterious object are aprox
RA (J2000): 2h 31m 58s
Dec (J2000): -19 30m 55s
------------------------------------------------------------------------------------------------
Gfamily2 - I did as you suggested - It is very clever! It successfully identified which part of the sky it was taken, and the 2 galaxies which knew were already there. There is star at the mystery location - a nice orange one! but the photos show no fuzz around it.

It must be some artifact in the telescope or camera, else something rather strange has happened to that star! I can't wait for the sky to clear again so I can have another look at it! (Maybe Monday)
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
Aratus
 
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Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire

Re: Mystery Object

Postby Graeme1858 » Mon Dec 03, 2018 8:45 pm

Is it clear enough to get an update tonight up your way?
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Re: Mystery Object

Postby Aratus » Tue Dec 04, 2018 12:40 am

Graeme1858 wrote:Is it clear enough to get an update tonight up your way?


It was clear enough, although still murky near the horizon.

What I can report is that the fuzz is still there on the ZWO 1600/80mm refractor. It isn't an artifact on the sensor as I tried it in different places.
I then tried to find the same star on the Canon/11"SCT. There is no fuzz around the star, but the star is very dim red star.
The obvious thing to do then was to connect the ZWO 1600 to the 11". This involved a lot of messing around changing the focus, and the alignment decided to go haywire. :x Anyway eventually I got it. The result of that combination was that there was no fuzz - much to my disappointment. However, neither was the star a dim red one. With the ZWO it was as bright as its neighbours! :o

I've combined the images to roughly the same scale on this image.

Image

I suspect the difference is due to the different internal filters used on the 2 different cameras. The star is clearly giving off light of a particular frequency which the ZWO filters let through, but the Canon doesn't. None of this explains the 'fuzz', but possibly it is part of the same phenomenon.

btw the star is designated as USNO J0231578-193055

I'm not sure where we go from here!

If anyone else would like to image this star with their equipment, it might help.
The J(now) co-ordinates are. . .
RA 2hr 32m 49.5s
Dec -19 26' 04s''

You should be able to put them manually into a 'goto' telescope mount.
I use an 11" reflector (Celestron CPC 1100) and a 3" refractor, (Sky-Watcher ST80) mounted on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI 120MM, ZWO ASI1600MC and Canon 1300D for imaging.
Aratus
 
Posts: 915
Joined: Tue Jan 12, 2016 2:17 pm
Location: East Lincolnshire


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