Jump to content


Photo

Omega Centauri, the Jewel Box and the Coal Sack

  • Please log in to reply
15 replies to this topic

#1 maroubra_boy

maroubra_boy

    Vendor - Gondwana Telescopes

  • -----
  • Vendors
  • Posts: 531
  • Joined: 08 Sep 2009
  • Loc: Sydney, Australia

Posted 29 April 2014 - 06:11 AM

I've been away from CN for some time. My apology for this. The weather here abouts hasn't been kind either during the New Moon periods either... :(

This last weekend saw the Ice In Space Astro Camp for 2014 happen. I arrived late on the Friday, and when I finally settled at the camp it was dark and I just didn't feel like setting up a big scope. The sky was clear, the full brilliance of the Milky Way was arcing overhead, so it was a great chance for some wide field sketching with my little 4" achro.

Omega Centauri and Surrounds

My favourite eyepiece for this little scope is my 30mm 82deg Explore Scientific bruiser. As this scope and EP combination gives me a massive 5deg TFOV, I'm always thinking "hmmm, I wonder how much of that patch I can see...". "That patch" this time was Omega Centauri and Centaurus A. Cripes! I could actually get BOTH in the one field of view!!!

Greed took hold and I wanted to sketch that entire FOV. Exhaustion from the long drive to camp took hold and I could only manage the area around Omega Centauri. But I am still so pleased with the 'cropped' sketch. Omega is seen resolved into a little ball of thousands tiny, tiny pin-point diamonds. Surrounding Omega is the mottled background of the Milky Way, and a lovely large darker patch to the left of the cluster, and another dark but smaller patch to its upper right. This big picture scene is totally missed when we magnify Omega. Blooming brilliant patch of sky, :)

I've sketched Omega several times, including with my 17.5", but what is lost in having such a magnified image is the incredible surrounds. I love my little 4" achro as much as my 17.5" dob.

This sketch represents approx. 4deg TFOV.

Object: Omega Centauri and surrounds
Scope: 4" f/5 achromatic refractor
Gear: 30mm 82deg Explore Scientific, 17X
Location: Lostock, NSW, Oz.
Date: 25th April, 2014
Duration: approx. 2hrs

Attached Files



#2 maroubra_boy

maroubra_boy

    Vendor - Gondwana Telescopes

  • -----
  • Vendors
  • Posts: 531
  • Joined: 08 Sep 2009
  • Loc: Sydney, Australia

Posted 29 April 2014 - 06:15 AM

Jewel Box and the Coal Sack

A little rest and back to it. Some time ago I had made a mental note of a potential sketching target as being the area around the lovely cluster The Jewel Box in the Southern Cross. The great thing about the same scope and EP combination is the TFOV encompasses the Jewel Box, Mimosa or Beta Cruxius, and the eastern edge of the dark nebula The Coal Sack, all set off against the mottled background Milky Way. Gorgeous stuff!

The Coal Sack is also surprisingly detailed. Streamers of darker lines, patches of brighter, and ghostly arcs. These details made for a great challenge as they are, well, black... Another fainter open cluster can also be seen just to the upper right of the Jewel Box. The Southern Cross contains dozens of open clusters within its boarders.

This sketch is very close to showing the full 5deg True Field of View I had. As for Omega, here big aperture just won't show this magnificent vista.

Object: Jewel Box and the Coal Sack.
Scope: 4" f/5 achromatic refractor
Gear: 30mm 82deg Explore Scientific, 17X, 5deg TFOV.
Location: Lostock, NSW, Oz
Date: 25th April, 2014
Duration: approx. 2hrs

Attached Files



#3 SteelStar

SteelStar

    Vostok 1

  • -----
  • Posts: 132
  • Joined: 08 Nov 2009
  • Loc: Oklahoma

Posted 29 April 2014 - 10:03 AM

Superb sketches! Love the wide fields. Well done.

#4 chrisrnuttall

chrisrnuttall

    Professor Emeritus

  • *****
  • Posts: 611
  • Joined: 29 Dec 2010
  • Loc: York, England

Posted 29 April 2014 - 03:36 PM

I wish i was that good.
And i wish my skies were too.

#5 niteskystargazer

niteskystargazer

    Gemini

  • *****
  • Posts: 3092
  • Joined: 05 Oct 2009
  • Loc: 41-43'-28" N 87-42'-39" W

Posted 29 April 2014 - 03:45 PM

Alex,

Very good sketches of Omega Centauri, Jewel Box & Coal Sack :).

CS,KLU,

:thanx:,

Tom

#6 frank5817

frank5817

    Cosmos

  • *****
  • Posts: 8423
  • Joined: 13 Jun 2006
  • Loc: Illinois

Posted 30 April 2014 - 08:07 AM

Hello Alex,

Always a pleasure to see your detailed sketching work. Very impressive.

Frank :)

#7 Aquarellia

Aquarellia

    Viking 1

  • -----
  • Posts: 768
  • Joined: 27 Oct 2012
  • Loc: Provence, France

Posted 30 April 2014 - 09:12 AM

Nice to see you back. Thank you to show us this. I'm fan of your sketches and related stories

Michel

#8 CarlosEH

CarlosEH

    Fly Me to the Moon

  • *****
  • Posts: 7217
  • Joined: 19 Jan 2005
  • Loc: Pembroke Pines, Broward County, Florida

Posted 30 April 2014 - 01:08 PM

Alex,

Thank you for sharing your outstanding observations of Omega Centauri and surroundings and the Jewel Box and Coal Sack. You have captured both regions beautifully. Both objects are visible at my latitude (+26.1 degrees North) but a lower altitude thank what you enjoy. Your observations show us in the Northern hemisphere what we are missing.

Regards,
Carlos

#9 Ed D

Ed D

    Gemini

  • *****
  • Posts: 3024
  • Joined: 30 Apr 2010
  • Loc: Sunny South Florida

Posted 30 April 2014 - 08:06 PM

Alex, your sketches are superb. Like Carlos, I'm also lucky to live in South Florida and get to see some of the treasures the southern hemisphere has to offer.

Ed D

#10 IVM

IVM

    Apollo

  • -----
  • Posts: 1062
  • Joined: 07 Jan 2008
  • Loc: USA

Posted 30 April 2014 - 09:42 PM

Great to see you back, and these wide-field drawings really bring back the Australian sky for me. I thought I saw NGC 4852 (if that is it next to the Jewel Box) too, but can find no record of it now.

#11 maroubra_boy

maroubra_boy

    Vendor - Gondwana Telescopes

  • -----
  • Vendors
  • Posts: 531
  • Joined: 08 Sep 2009
  • Loc: Sydney, Australia

Posted 01 May 2014 - 05:36 AM

I wish i was that good.


Chris, are you kidding! Mate, you have a gift for the planets I can only aspire to!

Thank you very much for the kind words and return welcome. I'm am pleased that these sketches appeal to you. I also enjoy the write up I add. I hope to convey the context of the sketches and my sentiments. For me, sitting at the eyepiece doing a sketch is more than just laying down details. It is also my escape & in a way my meditation.

#12 JayinUT

JayinUT

    I'm not Sleepy

  • *****
  • Posts: 3933
  • Joined: 19 Sep 2008
  • Loc: Utah

Posted 01 May 2014 - 01:18 PM

Alex,

Incredible sketches! I also have been using my 4 inch achro of late (last Saturday and last night) and I also did some sketching with it. It is a nice break from the dobs and since the weather hasn't been so great . . .

Actually I love your sketches and I will admit that I do like your write ups. They are insightful and I find a connection there to my own observing. Thanks for sharing and lets hope for better skies for all of us!

#13 Michael11

Michael11

    Ranger 4

  • -----
  • Posts: 325
  • Joined: 24 Jun 2006
  • Loc: Israel

Posted 01 May 2014 - 02:42 PM

Very impressive, as usual :)

#14 Aperturefever

Aperturefever

    Vostok 1

  • -----
  • Posts: 154
  • Joined: 12 Dec 2010
  • Loc: Lake Macquarie, Australia

Posted 03 May 2014 - 12:04 AM

Nice work, Alex. You're never scared of the bigger picture! Good to sit down in the telescope shed with you on the way back from the Ice in Space Camp on a rainy afternoon the other weekend and eyeball your work for real. Now that was a learning experience!

#15 rolandlinda3

rolandlinda3

    Gemini

  • *****
  • Posts: 3415
  • Joined: 24 Jan 2006
  • Loc: Crozet VA 22932

Posted 03 May 2014 - 10:27 AM

Really outstanding and sure made me smile. Closest I have gotten a pretty scene of this area is in the Philippines, but the atmosphere was still pretty bad. Nice observation story and nice recording.

#16 Aquarellia

Aquarellia

    Viking 1

  • -----
  • Posts: 768
  • Joined: 27 Oct 2012
  • Loc: Provence, France

Posted 09 May 2014 - 07:28 AM

Your second sketch is on ASOD today
http://www.asod.info/?p=12182
Congratulation!






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics