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December 2018 Observing Challenge

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#1 Alien Observatory

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Posted 04 December 2018 - 03:06 PM

December is a hard Observing Time for most of us due to the weather and cold temps.  However M42 and the related Nebula Emissions in the M42 Area are the winter-time Jewels in the Sky.  M42, M43 and the Running Man Nebula (NGC1973/74/75), the Horsehead Nebula (IC 434) and the Flame Nebula (NGC 2024) are the most common images we see.  Several smaller Emission Nebulas are in the M42 area but seldom imaged due to their low brightness.

 

So the Challenge is to try to image the hard ones and give us a look at your Best M42 this December.

 

Most Descriptions from WIKI or SS5....Have FUN...

 

p.s. Added Comet C46P/Wirtanen as a Bonus Find as it will be closest to Earth on December 16, 2018...Pat Utah smile.gif

 

M42...The Orion Nebula (also known as Messier 42, M42, or NGC 1976 is a diffuse nebula situated in the Milky Way, being south of Orion's Belt in the constellation of Orion. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of 1,344 ± 20 light years and is the closest region of massive star formation to Earth. The M42 nebula is estimated to be 24 light years across. It has a mass of about 2,000 times that of the Sun. Older texts frequently refer to the Orion Nebula as the Great Nebula in Orion or the Great Orion Nebula.

 

M43... Also known as De Mairan's Nebula and NGC 1982, is a star-forming nebula with a prominent H II region in the equatorial constellation of Orion. The De Mairan's Nebula is part of the Orion Nebula (Messier 42), being separated from the main nebula by a dense lane of dust known as the northeast dark lane. It is part of the much larger Orion Molecular Cloud Complex.     M 43 contains its own, separate small cluster of stars which have formed in this part of the Orion Nebula, and lies at a distance of about 1400 light years.

 

NGC 1973/74/75... The Running Man Nebula is found along Orion's sword of just north of M 42, these nebulae are between M 42 on the south and open cluster NGC 1981 to the north. Like M 42, NGC 1973-75-77 are also associated with Orion's giant molecular cloud, which lies about 1,500 light-years away. But these objects are dominated by the characteristic blue color of interstellar dust reflecting light from hot young stars.

 

NGC 1999... A 10th Magnitude dust-filled bright nebula with a vast hole of empty space represented by a black patch of sky, as can be seen in its images. It is a reflection nebula, and shines from the light of the variable star V380 Orionis.  NGC 1999 appears roughly 16.0 x 12.0 arcminutes in size.

 

IC 430... Another 10th magnitude Bright Nebula appearing in the constellation Orion. It is 154 light years from our solar system.  IC 430 appears roughly 11.0 x 11.0 arcminutes in size, corresponding to a physical diameter of 0.5 light years.

 

NGC 1990...  A 10th magnitude Bright Nebula appearing in the constellation Orion. It is 1337 light years from our solar system.   NGC 1990 appears roughly 50.0 x 50.0 arcminutes in size, corresponding to a physical diameter of 19 light years.

 

IC 434...The Horsehead Nebula, also known as Barnard 33, is a small dark nebula silhouetted against the glow of the emission nebula IC 434. Only by chance does the dark nebula resemble the head of a horse - but its coincidental appearance has led to its becoming one of the most photographed objects in the sky.

 

NGC 2023... Another 10th magnitude Bright Nebula appearing in the constellation Orion. It is 1533 light years from our solar system.  NGC 2023 appears roughly 10.0 x 10.0 arcminutes in size, corresponding to a physical diameter of 4 light years.

 

NGC 2024... The Flame Nebula is a beautiful emission nebula that covers a 30 arcminute area with patches of nebulosity cut by subtle dark bands and threads. A broad dust lane nearly bisects the nebula. A secondary dark lane runs from near the south end of the main rift into the eastern wing of the nebula. At least a dozen stars of magnitude 10 to 12 are embedded in the nebula.

 

IC 431/432...  These two nebulae are faint bluish glows around bright stars. IC 431 consists of two areas surrounding 8th and 9th magnitude stars. IC 432 is the brighter and larger of the two nebulae with a 7th magnitude illuminating star.

 

Comet 46P/Wirtanen... Comet 46P/Wirtanen was discovered photographically on January 17, 1948, by the American astronomer Carl A. Wirtanen. The plate was exposed on January 15 during a stellar proper motion survey for the Lick Observatory. Due to a limited number of initial observations, it took more than a year to recognize this object as a short-period comet.


Edited by Alien Observatory, 04 December 2018 - 10:08 PM.

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#2 Alien Observatory

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Posted 04 December 2018 - 09:46 PM

Added Comet 46P /Wirtanen as a Bonus Find for the December Chalange as it will be closest to Earth on December 16, 2018...

 

On 16 December 2018 the comet will pass 0.0781 AU (11,680,000 km; 7,260,000 mi) (~30 LD) from Earth, reaching an estimated magnitude of 3 to 7.5, making this pass the brightest one predicted, and the brightest close approach for the next 20 years. Its magnitude could peak as bright as magnitude 3 near its December 16, 2018 closest approach.

 

Pat Utah smile.gif

Attached Thumbnails

  • 2880px-C46P-orbit.jpg

Edited by Alien Observatory, 04 December 2018 - 09:55 PM.

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#3 Don Rudny

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Posted 06 December 2018 - 07:46 PM

Thanks for the add on of 46P/Wirtanen, Pat.

 

Here’s a capture from last night on Maunakea at 9200’ here on the Big Island of HawaiiUsed a SX Ultrastar C on an 11” RASA.  10x30s.

 

4009EF87-9499-408C-989E-4A89E2DA0A01.jpeg


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#4 Alien Observatory

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Posted 06 December 2018 - 08:57 PM

Very nice set up Don and TY for the great image...Pat Utah


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#5 Kaikul

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Posted 07 December 2018 - 01:35 PM

Thanks for the add on of 46P/Wirtanen, Pat.

 

Here’s a capture from last night on Maunakea at 9200’ here on the Big Island of HawaiiUsed a SX Ultrastar C on an 11” RASA.  10x30s.

 

attachicon.gif 4009EF87-9499-408C-989E-4A89E2DA0A01.jpeg

 

 

Great capture Don.

 

Is it my imagination or is that a tail pointing to the 4 o'clock direction?



#6 Don Rudny

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Posted 07 December 2018 - 03:50 PM

Great capture Don.

 

Is it my imagination or is that a tail pointing to the 4 o'clock direction?

Thanks, Kaikul.

 

You are not imagining things, but keep in mind that the RASA gives a mirror image right to left.  I’m working to get SX to implement a flip tool in SLL.  



#7 Stargazer3236

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Posted Today, 02:32 AM

Here are my images of M42, 43, Running man, IC 434/B33, NGC 2023 and 2024, These were taken with my AT60ED telescope and 294MC camera, using a Meade F/6.3 reducer/corrector and a UHC filter. Mouse over the pics for details on the images.

Attached Thumbnails

  • ic434 b33 405gain 2x2bin 75p zoom 20x15s uhc_.jpg
  • m42 4x4bin 66p zoom 400gain 325x2s.jpg
  • m 42 2x2bin 390g 45x8s 50 pcnt zoom.jpg
  • HH region 2x2bin 390g 44x8s 75 pcnt zoom.jpg
  • horsehead region 2x2bin 390g 35x8s 50 pcnt zoom.jpg

Edited by Stargazer3236, Today, 02:35 AM.

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#8 cmooney91

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Posted Today, 07:49 AM

Friday night  I was able to capture about an hours’ worth of motion of the approaching Comet 46P.

https://www.youtube....h?v=a9CjauTq6K4

 

It was clearly visible  as a concentrated glowing patch in 7x35 binoculars from Bortle 5 Sudbury, MA. I highly recommend trying to see it visually at least once before it goes.

 

 

I also looked at the flame  and horse-head with  a UHC filter for the fist time. I had to use longer exposures, but the increase in contrast on these emission nebula was err... astronomical.

 

I was using a  RT290 Mono through a 114x450 newt on a OnStep'ed Super Polaris

 

Flame Uhc filter 5000Gain 32sx7frames 224s Stretched

gallery_280529_10253_139114.jpeg

 

Horse head Uhc filter 5000Gain 32sx15frames 480s Stretched

gallery_280529_10253_94480.jpeg


Edited by cmooney91, Today, 01:13 PM.

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#9 Alien Observatory

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Posted Today, 11:54 AM

Here are my images of M42, 43, Running man, IC 434/B33, NGC 2023 and 2024, These were taken with my AT60ED telescope and 294MC camera, using a Meade F/6.3 reducer/corrector and a UHC filter. Mouse over the pics for details on the images.

Very Nice images using a small telescope...TY Pat Utah :)



#10 Alien Observatory

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Posted Today, 11:58 AM

Friday night  I was able to capture about an hours’ worth of motion of the approaching Comet 46P.

https://www.youtube....h?v=a9CjauTq6K4

 

It was clearly visible  as a concentrated glowing patch in 7x35 binoculars from Sudbury. I highly recommend trying to see it visually at least once before it goes.

 

 

I also looked at the flame  and horse-head with  a UHC filter for the fist time. I had to use longer exposures, but the increase in contrast on these emission nebula was err... astronomical.

 

I was using a  RT290 Mono through a 114x450 newt on a OnStep'ed Super Polaris

Nice Video Capture of the comet (waiting for any clear skies this week here) and the RT Mono looks like it works well with your Newt...Par Utah :)


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#11 selfo

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Posted Today, 04:09 PM

Here is my shot at the December EAA objects.  Quite a range of sizes here so tonight will concentrate on the ones I can see with my Wide field setup 80mm APO with 063 FR.  All pics taken with a UVIR cutoff filter with the exception of M42,43 which had a UVIR cutoff and Omega DGM filter stacked.  ASI 385 uncooled on Alt AZ. with  Master dark

M42 and M43.   51frames_510s_

 

 

gallery_251523_10366_417491.png

 

 

 

 

 

 

Horsehead and NGC 2023 and Flame Stack_121frames_1210s_

 

 

 

gallery_251523_10366_2604768.png

 

 

 

 

 

 

Running man  Stack_81frames_810s

 

 

gallery_251523_10366_417491.png

 

 

 

 

 

Hey Pat.  I  tried to image NGC 1990 but it’s too diffuse and large to see in my LP skies but I can sure see Alnilam.  Does that count?  LOL lol.gif   

Stewart


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#12 Stargazer3236

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Posted Today, 04:20 PM

Gonna try to image and make a movie of Wirtanen tonight.


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#13 Alien Observatory

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Posted Today, 04:37 PM

Here is my shot at the December EAA objects.  Quite a range of sizes here so tonight will concentrate on the ones I can see with my Wide field setup 80mm APO with 063 FR.  All pics taken with a UVIR cutoff filter with the exception of M42,43 which had a UVIR cutoff and Omega DGM filter stacked.  ASI 385 uncooled on Alt AZ. with  Master dark

M42 and M43.   51frames_510s_ 

 

 

Hey Pat.  I  tried to image NGC 1990 but it’s too diffuse and large to see in my LP skies but I can sure see Alnilam.  Does that count?  LOL lol.gif   

Stewart

Very nice images with the ASI 385 C and the 80 mm APO.  Those small scopes sure seem to work well (something I have not tried)...Pat Utah :)




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