#1  
Old 18-05-2010, 09:12 PM
Paddy's Avatar
Paddy (Patrick)
Canis Minor

Paddy is offline
 
Join Date: Jun 2007
Location: Strangways, Vic
Posts: 2,208
Observations 14/5/2010

Dear all,

Here are some notes from observations of May 14th at Strangways.

Telescope 400mm f4.9 tri-dob reflector
Eyepieces 28mm UWAN, 17,13,9 mm Naglers, Paracorr
Guiding: Night Sky Observer’s Guide (NSOG)

Seeing excellent 1/5
Transparency – excellent 7/7

2150

NGC 5927 GC in Lupus
175X No distinct core, few resolvable stars. Halo seems to have some dark patches with strands of haze distracted from the body of the cluster. Seems to span 5’

IC4406 PN in Lupus

250X At first appears pale bluish and slightly irregular disc. On further inspection, a firmer inner shell slightly elongated E-W is apparent with a fainter softer haze extending beyond this, also E-W. Slightly reminiscent of the Saturn nebula. Seems to have a slightly darker patch on the western edge. No discernible central star. UHC filter enhances impression of inner shell and softer outer haze. The outer haze seems more elongated to the east than the west. OIII enhances contrast and confirms above impressions. The inner core occupies about 1/3 of the whole PN and has several darker patches.

NGC 5746 GX in Virgo
175X Beautiful edge-on spiral close to 109 Virginis roughly N-S with distinct boxy nucleus and obvious dust lane down the eastern side of the disc, cutting through the central bulge so the some brightness is seen the other side of the lane. Very like NGC 4565. Stands up well to 250X, but no further detail revealed.

NGC 5740 GX in Virgo
175X Just to the south of 5746 is a broader and fainter oval haze with impression of a nucleus, but no further structure. NGC 5690 is a faint slip of haze just to the west of 5740

NGC 5846 Galaxy group in Virgo


175X NGC 5846 is a bright circular haze with bright distinct nucleus. Within its halo is a second bright patch which is 5846A. About 20’ top the east is NGC 5850. Although fainter than 5846, it has a bright nucleus and a bar oriented E-W with broader halo, looking like a face on barred spiral. Top the west of 5846 is 5845, a tiny faint patch of haze with stellar core. 7’ further on is another faint circular haze with nucleus, NGC 5839. 5846 and 5850 are definitely the stand out members of this group visually.

I search for Syefert’s Sextet, but the conditions are just too poor this low in the north to see such a faint group. I console myself with

Messier 5 GC in Serpens Caput
175X A fine looking specimen with some central concentration and a little clump of resolvable stars (reminiscent of a mini Ara) in the very centre of this somewhat disrupted GC. On the northern side of the centre is a dark arc. Seems to have almost a dark annulus around the centre of which this arc is a part. Strands from the core Seems to occupy about half the AFOV of 28’ and the centre is about half of this. A large strand from the western edge curves to the south.

NGC 5921 GX in Serpens Caput
175X A bit faint, but with distinct nucleus and bar roughly N-S inside oval haze. 250X Bar more distinct, pointing just to the east of a foreground star. Some dark spaces between spiral arms and the bar can be discerned. I’m surprised at how much detail can be seen in this fairly faint galaxy.

And the instant Central Victorian cloud of May 2010 ends the evening abruptly.
Reply With Quote
  #2  
Old 19-05-2010, 08:14 AM
kustard's Avatar
kustard (Simon)
Great Sage == Heaven

kustard is offline
 
Join Date: Sep 2009
Location: Melbourne, Australia
Posts: 734
Extensive observations there, very nice indeed. Tell me, how long do you spend on each object before you start making notes about it?
Reply With Quote
  #3  
Old 19-05-2010, 05:28 PM
Paddy's Avatar
Paddy (Patrick)
Canis Minor

Paddy is offline
 
Join Date: Jun 2007
Location: Strangways, Vic
Posts: 2,208
Thanks, Simon. I probably wouldn't spend more than 5 minutes before I start recording observations using a tape recorder, but I find that as I talk, more detail becomes clear. Then I tend to edit it as I transcribe.
Reply With Quote
  #4  
Old 19-05-2010, 07:22 PM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,945
Your galaxy observations never cease to impress me Paddy. You've got a real knack for pulling in the details! I *almost* saw the dust lane in NGC 5746 the other night, but LP overpowered it ofcourse. It's presence could be seen as a "hard" edge to the eastern side of the galaxy. The galaxy itself is excellent.

Looking at Wikisky, NGC 5921 looks pretty impressive, and your description is encouraging

Try going for NGC 6221 and 6215 next time your out, I'm eager to see what you see here. So far, these are the only galaxies I actually resolved spiral structure in, bar M83.

I was going to try for Serfets Sexytet the other night, but decided against it as it would require high power due to its tiny size but seeing was very bad which not only limit mag, but also washes out these faint tiny things.

Btw, Sat night was clear for the whole 9 yards

cheers
Reply With Quote
  #5  
Old 20-05-2010, 11:35 AM
Paddy's Avatar
Paddy (Patrick)
Canis Minor

Paddy is offline
 
Join Date: Jun 2007
Location: Strangways, Vic
Posts: 2,208
Thanks, Sab. Saturday was crystal clear at our place also, but we had guests staying. They did get dragged out to the scope, probably for a fair bit longer than they would have liked (folly to visit an astronomer when there is no moon), but guests do impede a good long night at the eyepiece.
Reply With Quote
  #6  
Old 21-05-2010, 09:50 AM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,945
Quote:
Originally Posted by Paddy View Post
Thanks, Sab. Saturday was crystal clear at our place also, but we had guests staying. They did get dragged out to the scope, probably for a fair bit longer than they would have liked (folly to visit an astronomer when there is no moon), but guests do impede a good long night at the eyepiece.
That's a bummer. I also prefer not to be disturbed when the night is good

TOnight and tomorrow nights looking good. Last chance before moon.
Reply With Quote
  #7  
Old 21-05-2010, 02:02 PM
astrospotter (Mark)
Registered User

astrospotter is offline
 
Join Date: Jan 2010
Location: San Jose, CA, USA
Posts: 146
Serfets Sexytet

Nice Freudian keyboard slip. ... or was it

Hickson 79 is one tough compact galaxy group. I have only been able to take away 3 for sure and a 4th using averted imagination in an 18". Will have to try it again this season. I am at +36 degrees so it is not so far in the muck but is still a difficult target for all 6. It was 40 degrees off of horizon so maybe I'll try it a bit higher.

Like the name, will use it this summer to see if anybody catchs on

Thanks
Mark
Reply With Quote
  #8  
Old 21-05-2010, 02:14 PM
pgc hunter's Avatar
pgc hunter
Registered User

pgc hunter is offline
 
Join Date: Feb 2009
Location: Renmark, SA
Posts: 2,945
Quote:
Originally Posted by astrospotter View Post
Nice Freudian keyboard slip. ... or was it
total "accident"
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 09:37 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Advertisement
Star Adventurer
Advertisement
Astromechanics
Advertisement
Testar
Advertisement
EQ8-R
Advertisement
Lunatico Astronomical
Advertisement
Bintel
Advertisement
Celestron RASA
Advertisement
Astronomy and Electronics Centre
Advertisement