Archive for the 'Observing Reports' Category

Observing Report 24th-25th June 2010 (Tidy obsy, scruffy Jupiter)

Posted by on June 25th 2010 in Astrostuff, Observing Reports, Pics
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I managed to get out to the obsy last night, mainly to get the place tidied up and to oust the spiders that had invaded during the spring. The skies weren't really good enough for any deep-sky observing, as there was a persistent high-level moonlit haze that was ruining the contrast and which would have washed-out any images taken with the D50. Nevertheless it was a calm warm night so I stayed up to see Jupiter rise above the eastern horizon into a brightening blue dawn sky.

Not being one to pass up an opportunity, I decided to have a crack at imaging it with the mono DMK camera and some RGB filters even though the seeing wasn't really good enough.

Anyway, the resulting image from the first set of data is below:

 

 

 

 

I've got more data to process, some of which has Europa in the frame as well as Jupiter and Io. If the processing works out OK I'll let you know.

Observing Report 17th June 2010 (Daylight Moon bits)

Posted by on June 22nd 2010 in Astrostuff, Observing Reports, Pics

Observing the early phases of the Moon from my obsy is a bit of a lottery - due to the restricted western view the only way to get the scope pointing at the thin waxing crescent is when the Moon's high in the sky. At this time of the year, that means observing during the daylight a few hours before sunset, which in turn means that the seeing is always going to be a limiting factor.

Never let it be said that I'm one to shy away from a challenge - here are some images gleaned from webcam data grabbed at about 20:00...

(mouseover the pics for the annotated versions):

Neander (30 miles dia.), Rheita E (40 x 19 miles), Furnerius (76 miles dia.),
Rheita (42 miles dia.), Fraunhofer (35 miles dia.), Metius (53 miles dia.),
Brenner A (19 miles dia.), Young D (27 miles dia.), Fabricius (47 miles dia.),
Vallis Rheita (303 x 18 miles)

 Pitiscus (50 miles dia.), Vlacq (54 miles dia.), Hommel (76 miles dia.),
Rosenberger (58 miles dia.), Nearch (46 miles dia.)

Daniell (18 x 14 miles), Rima G Bond (91 x 2 miles), G Bond (19 miles dia.),
Luther (6 miles dia.), Posidonius (58 miles dia.), Chacornac (31 miles dia.)

Endymion (76 miles dia.), Keldysh (20 miles dia.), Hercules (42 miles dia.),
Atlas (53 miles dia.)

Piccolomini (53 miles dia.), Neander (30 miles dia.), Rothman (25 miles dia.),
Rheita (42 miles dia.), Stiborius (27 miles dia.)

Messala (75 miles dia.), Berosus (45 miles dia.), Bernoulli (29 miles dia.),
Geminus (52 miles dia.), Burckhardt (35 miles dia.), Cleomedes (76 miles dia.)

Madler (17 miles dia.), Theophilus (61 miles dia.), Cyrillus (59 miles dia.),
Beaumont (32 miles dia.), Catharina (61 miles dia.)

 

Observing Report 2nd-3rd June 2010 Part 3a (M27 reprocessed)

Posted by on June 5th 2010 in Astrostuff, Observing Reports, Pics

Had another go at processing the M27 data, managed to drag out some more detail:

M27 (NGC6853) reprocessed.
Subs: 22 light @ 120s, 22 dark @ 120s and 20 flat @ 2s, all ISO200.
D50 and MPCC on the C8N, guided with PHD.

Observing Report 2nd-3rd June 2010 Part 3 (M27)

Posted by on June 4th 2010 in Astrostuff, Observing Reports, Pics

OK, here's the third and final couple of pics, the target was M27 (aka The Dumbbell Nebula, NGC6853), a planetary nebula in the constellation of Vulpecula. Again, you get one version with the diffraction spikes and another without. Click 'em for more bigness:

M27 (NGC6853) as processed.
Subs: 22 light @ 120s, 22 dark @ 120s and 20 flat @ 2s, all ISO200.
D50 and MPCC on the C8N, guided with PHD.

 As previous but with added spikes.


That's yer lot.

Observing Report 2nd-3rd June 2010 Part 2 (M29)

Posted by on June 4th 2010 in Astrostuff, Observing Reports, Pics

OK, here's the second couple of pics, the target was M29 (aka NGC6913), an open cluster in the constellation of Cygnus. You get one version with the diffraction spikes and another without. Click 'em for more bigness:

M29 (NGC6913) as processed.
Subs: 41 light @ 60s, 41 dark @ 60s and 20 flat @ 2s, all ISO200.
D50 and MPCC on the C8N, guided with PHD.

 As previous but with added spikes.


There's even more...

Observing Report 2nd-3rd June 2010 Part 1 (M13)

I managed to escape from the house last night and took refuge in my obsy. The skies weren't particularly clear, mainly due to the pending moon-rise, and the seeing was only middling, but I managed to get some dSLR pics of some Messier objects. For the first time I took some flat-frames as well as the customary lights and darks, it wasn't the hassle that I thought it would be, mainly due to me thinking laterally and adapting the "white tee-shirt method" by using a white microfibre cloth over the end of the scope.

The results are worth the extra effort, I reckon - there's less hassle trying to get Photoshop to correct the vignetting inherent in images of this kind. I'll probably knock-together some sort of white-screen contraption for the end of the scope now that I've got a better idea of what works.

Here's the first couple of pics, the target was M13 (aka The Hercules Globular Cluster, NGC6205) and it looks like I've managed to catch the faint smudge of NGC6207 near the top edge of the uncropped version:

M13 (The Hercules Globular Cluster, NGC2605) in the centre, NGC6207 to the upper-left(ish).
Subs: 50 light @ 60s, 50 dark @ 60s and 20 flat @ 2s, all ISO200.
D50 and MPCC on the C8N, guided with PHD.

 Cropped version


There's more...