#1  
Old 12-03-2010, 01:22 PM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,939
Observation Report 11/3/10

Went out last night with the 120mm skywatcher short tube for a bit of wide field viewing. Also was my first real night out with the 120ST. One thing I noticed, navigating with a refractor is a pain! THe view is completely reversed to what's on the charts, now being a newtonian bloke all me life, I found it awkward to navigate! I gotta get used to that.

Now, I bought the 120ST purely for wide field viewing. For that purpose, it is excellent. Its large aperture gives nice bright images and resolution of DSOs even at low power while still allowing glorious vistas of large bright open clusters and nebulae. At powers around 100x or so, things start to go a bit soft as the effects of chromatic abberation take hold, but I didn't get this scope for high mag scrutiny of tiny PNe's and planets The scope sits on the Stellarvue M1 mount, which IMO is probably at the very limit of what the mount can handle, but balances well at all tube orientations. The only snag is that I have to tighten the alt clutch whenever I change EPs or filters, which becomes a chore, but I guess is unavoidable due to the lever arm the tube creates.

Time: 9:15pm-midnight
Scope: 120mm ST refractor

Started off with a sweep of the Carina Milkyway with the 22mm LVW giving 27x and a TFOV of 2.4. The Eta Carina Nebula was fantastic in the 22mm with the OIII filter. The entire cloud spread across approx 2/3rds of the field, with fainter tendrils stretching out further. Dark lanes appeared to cut the nebula into 5 distinct sections. The brightest region showed some texture and its southern edge was ruffled, and also the keyhole was clearly defined.

Sweeping down towards IC 2944 (Running Chicken Nebula) bought into view a whole host of little knots and clusters. Looking at the map, these were the giant HII regions of NGC 3576/79 and 3603, which in the 120ST at 27x appeared as tiny knots. IC 2944 itself was very obvious through the 22mm EP and OIII filter, appearing as a broad C-shaped ring cradling the line of bright stars stretching southwards from Lamda Centauri.

While in the area, I stumpled upon a tiny fuzzy patch, which took me only 20 minutes to identify due to the reversed FOV! Turns out this patch is the tight open cluster Melotte 105.

Next I swept up NGC 2516, which is an excellent cluster located just SE of the false cross on an extended centreline of its long axis. At 27x, approx 90 stars could be seen in the region. I got the impression that this cluster looks like a man standing upright with outstretched arms, although upside down! A bright red star marks his right toe and another fainter and paler orange star neatly marks his right nipple!

Next up I went for a cruise in the Canis Major region, and apart from some familiar sights, have found other objects which I otherwise probably would've never tried to hunt down. NGC 2362 has always been a favourite of mine, and with the 22mm LVW at 27x, I could see around 20 or so stars packed around Tau CMA, arranged in a triangular mass with tau slightly off-centre. Averted vision brings out even more stars, making for quite a striking sight.

Further sweeping of the area bought me to NGC 2467, a HII region in Puppis. At 27x, I could see a faint, oval haze with the northern side "squished". The southern side appeared more diffuse than the north, suggesting a dark lane. Using the OIII, a dark lane could be seen cutting across the nebula's northern edge, with much fainter haze beyond. A dark patch was also seen inside the main body, adjacent the mag 7.5 star it surrounds.

Further sweeping of this rich Milky Way field turned up a surprise. NGC 2477. Extremely rich open cluster, infact it reminded me of a low power view of Omega Centauri. At 27x, a dense ball of faint stars could be seen, arranged in chains and streamers. Using the 8mm LVW at 75x, the ball of pinpricks was resolved into a carpet of stars, which could be mistaken for a rich although non-condensed globular cluster. A chain of 5 brighter stars curves away to the north and a mag 4 star lies immediately to the cluster's south.

Nearby is NGC 2451, only 1.5 to the WNW. Very pretty in the 22mm LVW. Huge, loose gathering of 4-7 stars, numbering around 20 in total with another 2 dozen fainter stars scattered around the cluster. The brightest members are arranged in a square with a small triangle in the middle, with a bright red star marking the cluster's centre. What a contrast to NGC 2477!

Also swept up numerous other little groupings and clusters in the area which I didn't identify, but a very nice rich area of the sky. Also took a look at Omega Centauri which was showing good resolution in the 13mm LVW at 46x and had a look at NGC 5128, with the dust lane visible.


Now for the best part....it only took 10 minutes from calling it quits until my head was on the pillow! Grab n go rules! Think about that all you big dob pushers and faint galaxy hunters

Last edited by pgc hunter; 12-03-2010 at 01:35 PM.
Reply With Quote
  #2  
Old 12-03-2010, 02:08 PM
Ric's Avatar
Ric
Support your local RFS

Ric is offline
 
Join Date: May 2006
Location: Wamboin NSW
Posts: 12,402
Hi Sab, great report.

It's good to see your getting some nice clear nights.

Cheers
Reply With Quote
  #3  
Old 12-03-2010, 02:16 PM
Rob_K
Registered User

Rob_K is offline
 
Join Date: Oct 2006
Location: Bright, Vic, Australia
Posts: 2,101
Good stuff pgc! Have you ever thought of getting a bigger scope and hunting down faint galaxies?

Cheers -
Reply With Quote
  #4  
Old 14-03-2010, 08:05 PM
Paddy's Avatar
Paddy (Patrick)
Canis Minor

Paddy is offline
 
Join Date: Jun 2007
Location: Strangways, Vic
Posts: 2,208
What irony from the master of the faint galaxy even without a huge dob. Very interesting to read quite a different report from your usual - and certainly up to your usual high standard. I'm about to take delivery of my first ever refractor, so I'll follow in your footsteps. I'll have to have another look at NGC 2516 to see if I can see this man in the cluster.
Reply With Quote
  #5  
Old 15-03-2010, 01:39 PM
goober's Avatar
goober (Doug)
No obs, raising Harrison

goober is offline
 
Join Date: Nov 2007
Location: Melbourne, Australia
Posts: 793
Quote:
Originally Posted by pgc hunter View Post
Next I swept up NGC 2516, which is an excellent cluster located just SE of the false cross on an extended centreline of its long axis. At 27x, approx 90 stars could be seen in the region. I got the impression that this cluster looks like a man standing upright with outstretched arms, although upside down! A bright red star marks his right toe and another fainter and paler orange star neatly marks his right nipple!
Nice, I saw 80 stars in my 101mm a few weeks back, but no nipples.

Quote:
Now for the best part....it only took 10 minutes from calling it quits until my head was on the pillow! Grab n go rules! Think about that all you big dob pushers and faint galaxy hunters
Quoted for truth!
Reply With Quote
  #6  
Old 16-03-2010, 03:53 PM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,939
Quote:
Originally Posted by Paddy View Post
What irony from the master of the faint galaxy even without a huge dob. Very interesting to read quite a different report from your usual - and certainly up to your usual high standard. I'm about to take delivery of my first ever refractor, so I'll follow in your footsteps. I'll have to have another look at NGC 2516 to see if I can see this man in the cluster.
Thanks Paddy Yes it was quite fun just sweeping around the Milkyway. Now if only I can catch a clear morning (yeah right!) so I can play around in the galactic center

Quote:
Originally Posted by Rob_K View Post
Good stuff pgc! Have you ever thought of getting a bigger scope and hunting down faint galaxies?

Cheers -
Grab n go is teh shiznit mate...why trade that for a grab n hernia!
Reply With Quote
  #7  
Old 18-03-2010, 03:42 PM
orestis's Avatar
orestis
Registered User

orestis is offline
 
Join Date: Jun 2009
Location: southern highlands, Australia
Posts: 679
great report Sab,

Cheers Orestis
Reply With Quote
  #8  
Old 21-03-2010, 05:32 PM
Paddy's Avatar
Paddy (Patrick)
Canis Minor

Paddy is offline
 
Join Date: Jun 2007
Location: Strangways, Vic
Posts: 2,208
Had a look for this man asterism in NGC 2516 last night with both my new ed80 and the 16". Have yet to make it out, but I'll have another look tonight.
Reply With Quote
  #9  
Old 22-03-2010, 07:27 PM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,939
Quote:
Originally Posted by Paddy View Post
Had a look for this man asterism in NGC 2516 last night with both my new ed80 and the 16". Have yet to make it out, but I'll have another look tonight.
It's a fairly large cluster, so use your lowest available magnification, so you are not busting apart the stars too much and ending up losing the effect. It's probably best seen in smaller scopes aswell.
Reply With Quote
  #10  
Old 23-03-2010, 10:04 AM
Paddy's Avatar
Paddy (Patrick)
Canis Minor

Paddy is offline
 
Join Date: Jun 2007
Location: Strangways, Vic
Posts: 2,208
Thanks Sab. I did get finally get it on Sunday night with 16" dob. Obs report to follow.
Reply With Quote
  #11  
Old 26-03-2010, 02:55 AM
astrospotter (Mark)
Registered User

astrospotter is offline
 
Join Date: Jan 2010
Location: San Jose, CA, USA
Posts: 146
Agree with 2516 little man description

Thanks for the OR, I miss the south skies already ... sob. Only having seen 2516 a few times (EVER) a week ago the image of a speckled man hit me right away as well. Part of the fun is picking out what these objects remind us of it seems.

What a great open cluster. This is my detailed note as I am currently making my way through my rather crammed session with this one just transcribed from my recorder yesterday. It starts with 'clinical description' but then the man is described. The 1st line are some tags my perl script extracts when I process this entry so it lands in my main spreadsheet with things like what list it appears on (besides NGC/IC etc). format is compatible with MegaStar below is why I do it this way.


con: Car lst: SSAL,C96 cmt: MJ_SpeckledManCluster:
NGC 2516 Cr 172 Mel 82
Open 3.8 29.0' 80 7.0 I 3 r LYN 07 58 00.0 -60 45 00
1:10am 35mmPan 30' main len 2EL NS orientation. About 50 stars Naked Eye visible. Obvious from background and many tiers of magnitudes. Impressive. Like a man with 1-star head to the south. Carbon star on W side of body. Feet both point to E at far N of cluster. Head is 1 star spaced by small gap. 1 leg bends to N in arch. Other one sticks out NW with a foot straight E (brighter stars). Arm on West comes out and drops North.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 01:43 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
Celestron Australia
Advertisement
Lunatico Astronomical
Advertisement
Bintel
Advertisement
OzScopes Authorised Dealer
Advertisement
SkyWatcher Australia
Advertisement
Astromechanics
Advertisement
Meade Australia
Advertisement
Astronomy and Electronics Centre
Advertisement