Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

stargazine_ep24_banner.thumb.jpg.56e65b9c9549c15ed3f06e146fc5f5f1.jpg

MikeODay

The Jewel Box Cluster in the Crux Constellation ( NGC 4755 )

Recommended Posts

The Jewel Box ( NGC 4755 ) by Mike O'Day ( 500px.com/mikeoday )

This is a re-processed version of an old capture of mine taken last year when I was a two day old baby astrophotographer. Back then I was only just learing how to polar align my scope on its tripod and auto-guiding was a distant goal. This is a stack of 15 x 30sec images from my unmodified Nikon D300 ( I now use an unmodified D5300 as it is lighter and causes less flex in the focuser ).

Description:

The Jewel Box Cluster in the Crux Constellation ( NGC 4755 ) by Mike O'Day ( 500px.com/MikeODay )

Viewed through a telsecope, John Herschel described the Jewel Box Cluster as "a casket of varioulsy coloured precious stones" - hence the name. The Jewel Box, visible only from the Southern Hemisphere and appearing as a bright fuzzy star to the naked eye, is a cluster of around 100 ( mostly blue giant ) stars approximately 7000 light years from Earth.

Links:

500px.com/MikeODay

photo.net/photos/MikeODay

Details:

NGC 4755 - RA 12h 54.5m, Dec -60deg 26'.

Skywatcher Quattro 10" f4 Newtonian.

Skywatcher AZ Eq6 GT Mount.

Unguided.

Baader MPCC Mark 3 Coma Corrector.

Nikon D300 (unmodified).

Field of view (deg) ~ 1.35 x 0.90.

Combination of 15 images 30 sec @ ISO800.

Registax & Photoshop

24 April 2014 (re-processed Nov 2015)

  • Like 8

Share this post


Link to post
Share on other sites

Lovely shot of a great object. I have only ever seen it through fairly cheap 15x70 bins, but even then it is great.

Thanks Michael, much appreciated.

Share this post


Link to post
Share on other sites

Another great image... You almost captured the look and feel of it through the eyepiece... I say almost because no photo beats the view of a number of objects through the eye piece... The jewel box being one of them... Awesome image tho....

  • Like 1

Share this post


Link to post
Share on other sites

Another great image... You almost captured the look and feel of it through the eyepiece... I say almost because no photo beats the view of a number of objects through the eye piece... The jewel box being one of them... Awesome image tho....

Thanks for your kind words. Although I have take your word for how it looks through an eyepiece - soon after I set up my Newtonian scope I rotated the tube so that the focuser was on the underside ( when pointing at the pole ) to better balance the camera, etc. Since then I have not looked through an eyepiece due to the mostly awkward shapes and angles I would need to contort into in order to see down the eyepiece!

Cheers

Mike

  • Like 1

Share this post


Link to post
Share on other sites

Spectacular image. Always nice to see the jewels of the Southern sky.

  • Like 1

Share this post


Link to post
Share on other sites

Spectacular image. Always nice to see the jewels of the Southern sky.

Thanks, much appreciated.

Share this post


Link to post
Share on other sites

I often say that the hardest things to get right in deep sky imaging are the background sky and the stars. Here we have an object lesson in what they should look like, glittering, small, tight, colourful stars and a nicely judged neutral, matt background sky. Glossy backgrounds just look artificial.

This is one of the best cluster images I remember seeing.

Olly

  • Like 1

Share this post


Link to post
Share on other sites

I often say that the hardest things to get right in deep sky imaging are the background sky and the stars. Here we have an object lesson in what they should look like, glittering, small, tight, colourful stars and a nicely judged neutral, matt background sky. Glossy backgrounds just look artificial.

This is one of the best cluster images I remember seeing.

Olly

Thank you very much for your kind words. The challenge you mention is one that I constantly struggle with. I am pleased that you think I got it right. Much appreciated.

Cheers

Mike

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By AstroRuz
      For sale is my beloved but now superfluous to requirements HEQ5 Pro for £700
      It's in a used condition as you would imagine. I've had it for about 4 years and found great success with this mount. Ideal for those beginning astrophotography and also good for visual users.
      I'm calling it "deluxe" due to the upgrades I've had done.
      - It's belt modified
      - It's had brand new bearings and grease
      - The backlash has been expertly setup 
      - It has the latest polar scope
      - The power port has been replaced with an aviation style port which is a lot more secure
      It'll come with the hand controller and at least 1 counterweight (if I can find the second it'll come with both). The polar scope cover has been lost. The counterweight is rusty as always. There is some marring on the counterweight bar housing as shown in the photos.
      It also will come with the modified power cable required also.
      Note: the power LED sometimes doesn't illuminate but the mount is still powered (please see the photo with the hand controller).
      Collection or local delivery within Northampton







    • By Spacecake2
      Hello,
      I know you've seen these questions a lot (unless your new) but I'm struggling a lot on if I should buy a Skywatcher 250px (10") or 200px (8") (dobsonians). I have a 5 inch and i'm looking for a big step up for noticeable changes. 
      Thank you 
       
    • By Hoopla
      Hi All,
      im totally new to this and have been getting setup over the past 3 months. I’ve purchased a Skywatcher 150P on a EQ3 Pro mount. 
       
      I have a 2x and 3x Barlow with 10x and 20x eyepieces. I’m trying to view and photograph Mars as it’s so bright at present and easy to see however I’m really struggling to see anything more than a bright ball when viewing and when photographing it’s just a blurry ball. 
       
      I have a canon 700d DSLR with t ring and adaptors  
      can folk suggest what combination of Barlow / eyepiece would be required to view Mars in all its glory and possibly lens and iso/exposure settings to get some nice shots too please. I’m aware I may need to stack and am tech savvy so this bit should be ok. I just can’t seem to get anything at present to process.
      help!! 
    • By Astrid
      My 200P just arrived and oh my God... I have been trying to wrap my head around the mount for 4 hours.
      The manual didn't really help so I decided to go on youtube, but again, I didn't find any good and detailed videos so I decided to ask here if there is any video or perhaps blog post that might help me set up the mount. 
      Thank you very much! 
      *by the way, is the EQ5 supposed to have slow motion cables? I only got 2 knobs (not cables) and I'm not sure if there is something missing or not... sorry, this is the first time I've used a serious equatorial mount or telescope. 
      Thank you very much!
    • By Davehux
      There’s a new kid on the block now, so it’s time to move this brilliant scope onto another happy owner.
      Bought new from FLO just over 2 years age, it’s produced some awesome image - shown below - all taken with this scope and an ASI294 camera.
      I’ve upgraded the focuser to an OVL model, and the difference from the standard one is immense. Runs smooth from one end to the other, and has no problem holding a lump of a cooled camera or a DSLR without slipping. It also has a standard 2” connector.
      Also included is the Skywatcher 0.85 focal reducer/flattener with 2” adapter, so swapping out the camera for the eyepiece is a 2 second job.
      The optics are all clean, bright and scratch-free. There’s a piece of Velcro on the tube, where I used to have my ASIair V1 stuck on. Apart from the usual bite marks on the dovetail, it’s in excellent overall condition.
      The standard SW 9x50 finder scope, 28mm eyepiece, a couple of adapters, and diagonal are all included, also comes with the aluminium case.
      This whole outfit would cost you £842 plus delivery, to buy from FLO today. It’s yours for £525 delivered to a UK mainland address. 
       









×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.