Archive for the 'Pics' Category

Observing Report 24th-25th July 2011 (Messiers, Jupiter and Moon but no Sun)

Posted by on July 28th 2011 in Astrostuff, Observing Reports, Pics

Sunday evening was still and clear with good seeing so I made my excuses and headed to the shed for another Messier Object imaging session. For some reason the northern skies were darker than I'd expected so I had a look around there and decided to try to image M81 and M82 in one hit. After a bit of jiggery-pokery I got the 1000D rotated to get a decent framing and then I set to with the hardware and software. After a couple of hours I'd got some decent subframes so I moved to a different target - M74. This thing isn't called The Phantom for no good reason... it's hard to image because it's so dim. I upped the exposure from the standard 5 minutes to a more realistic 15 but still didn't get useful results so I scrubbed the attempt.

By then the Moon was rising and the sky was lightening. Jupiter had already risen and was an obvious target so I opted to go for a wide shot with the webcam and CCD camera in order to pick up some Galilean moons.

That finished, I turned the scope towards the Moon which was by then well above the horizon with the Sun not far behind. Just enough time to grab some CCD data to make another big mosaic.

I had intended to go the last mile and get some early-morning sunspot images but before the Sun reached a suitable position I was too knackered so I called it a morning, packed up and got me a few ZZZZs before the usual waking-up time.

Clickable results as follows:

M81 (aka Bode's Galaxy, NGC 3031, lower-right) and M82 (aka The Cigar Galaxy, NGC 3034, upper-left),
a pair of galaxies in the constellation Ursa Major.
Subs: 24 light @ 300s, darks and bias frames, ISO400.
1000D on the 6" R-C, guided with PHD.

L to R: Jupiter, Europa, Io, Ganymede.
Luminance: 100/1000 frames stacked with K3CCDTools3,
DMK mono CCD camera on the 6" R-C.
Colour: 100/1000 frames stacked with K3CCDTools3, SPC900NC webcam on the 6" R-C.

 The Moon.
14-pane mosaic created with iMerge.
Each pane 500/2000 frames stacked with K3CCDTools3.
DMK mono CCD camera on the 6" R-C, unguided.

Observing Report 26th-27th June 2011 Part 3 (Wargentin late in the morning)

Posted by on July 5th 2011 in Astrostuff, Observing Reports, Pics

The area around Schickard is fairly easy to see and to image when the Moon is approaching Full as it's well-lit from the West. Usually these conditions can be met during the hours of darkness. Trying to see it when it's lit from the East is a different proposition with the Moon approaching New and the sun nearby in the sky - usually it's a daytime-imaging jobbie, and that's what we have here.

The main object of interest here is Wargentin. Take just one look at it and you can see that it's not like standard lunar impact craters. No high walls surrounding a deep basin, here we have an impact crater that was filled to overflowing with basaltic lava to form a 900ft high circular plateau somewhat reminiscent of a huge coin.

Again, a red filter was needed to cut the blue glare and to reduce the effect of the bad seeing,  so the resolution's not great, but I'm quite pleased with the result...

Wargentin (51 miles dia.), Schickard (137 miles dia.), Phocylides (69 miles dia.),
Nasmyth (47 miles dia.), Inghirami (55 miles dia.)

The "coin" effect is easier to make out in the above image if you cock your head over to the left. To save you from the hassle and inherent physical danger of such gymnastics, here's a rotated version:

 

If you fancy a peep at Wargentin, here's where to look:

 

Observing Report 26th-27th June 2011 Part 2 (A late-morning crescent Moon)

Posted by on June 30th 2011 in Astrostuff, Observing Reports, Pics
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After doing my bit to get the rest of the family off to work, school or whatever I went back to the obsy to pack away the kit. By then it was getting on for 10a.m. , the sun was beating down again and the sky was clear and blue. High up and almost due south I could just make out the thin crescent of the waning Moon, and I was compelled to have a pop at it with the DMK. A red filter was needed to cut the blue glare and to reduce the effect of the bad seeing and so the resolution's not great, but it was worth playing those ten minutes of extra-time...

Moon (27/06/2011 @ 10:05 approx).11 panes stitched with MaxIm DL5.
Each pane is 150/3000 stacked frames. DMK mono CCD camera on the GSRC6M.

Observing Report 26th-27th June 2011 Part 1 (A double and a cluster)

Posted by on June 29th 2011 in Astrostuff, Observing Reports, Pics

A warm clear night after one of the hottest day of the year so far. Clarity was good although the seeing was only fair at best. Still not much full darkness but managed to get two targets before it got too light...

Albireo, the fifth brightest star in the constellation Cygnus.
Albireo appears to the naked eye to be a single star but through a telescope even low magnifications resolve it into a double star.
The brighter yellow star makes a striking colour contrast with its fainter blue companion.
Subs: 10 light @ 150s, darks and bias frames, ISO400.
1000D on the 6" R-C, guided with PHD.

M39 (aka NGC 7092), an open cluster in the constellation Cygnus.
Subs: 12 light @ 300s, darks and bias frames, ISO400.
1000D on the 6" R-C, guided with PHD.

Observing Report 7th-8th June 2011 (Yet another cluster)

Posted by on June 9th 2011 in Astrostuff, Observing Reports, Pics

A session in adverse weather conditions. Most of the data was trashed by clouds and/or skyglow. Again, not enough hours of proper darkness for more than one target. Click the pic to see a larger version...

M71 (aka NGC 6838), a loosely-concentrated globular cluster in the constellation Sagitta.
Subs: 12 light @ 300s, darks and bias frames, ISO400.
1000D on the 6" R-C, guided with PHD.

Observing Report 18th-19th May 2011 (Another Cluster)

Posted by on May 25th 2011 in Astrostuff, Observing Reports, Pics

Another session, another glob. Needed to use the 2x PowerMate to get a decent-sized image on the chip, so resolution has suffered a bit.

Not enough hours of proper darkness for much more than one target...

M56 (aka NGC 6779), a globular cluster in the constellation Lyra.
Subs: 13 light @ 300s, darks and bias frames, ISO400.
1000D on the 6" R-C with 2x PowerMate, guided with PHD.