Clear night with the July 4th fireworks. I used a Zhumell skylight filter but it is not very effective. Soon purchasing an OIII filter… Here are a few grainy images.
Study of Coma Berenicis. The night sky was mostly clear with thin clouds intermittent. High light pollution: not at my dark site tonight. This night I was using a skylight filter from Zhumell: it did cut down somewhat on stray light and gave a colorful tinge to images. Each image is 10 exposures at 15-25 seconds with an ISO of 800. In order, we have M64, binary system Cor Caroli, cluster M53, and a favorite edge-on spiral galaxy NGC4565.
Light pollution, an ISO that was too high, and I lost my skylight filter… But here is C38 anyhow, and M51 here.
Full Lunar eclipse this April starting at 1:20am EDT for North America. Visible from North America as well as South America and much of the Pacific. Details at Sky and Telescope here.
Acquired from Slooh space camera on 1/13/14
Here are some random images obtained from the Slooh telescopes in the Canary Islands. This is a nice service to have during the cloudy Winter months. Slooh does have it’s bad weather moments though, as this week has had some tricky clouds. Click each image to get full size.
Slooh costs $300US per year, billed quarterly.
I have scheduled a session with Slooh telescope Dome 2 in the Canary Islands to take some 5 minutes of images of galactic clusters in Andromeda. Two clusters of which NGC 504 and NGC 507 are a part. I will post images when I have them on Tuesday 1/6/2014.
Primary Instrument: 0.35 metre f/11 Schmidt-Cassegrain
Field of View: 13.1×8.8 arc-minutes
This makes things a little easier. I previously tried the Orion thin off-axis guider; it was difficult to find good focus between the two cameras (DSLR and CCD auto-guider). This Orion imaging flip mirror is a lot easier to use and set up. I have it mounted on my guide scope – an older but rugged Meade 1980’s spotting scope. The Meade DSI II is attached. I really like the things at Orion.
I have just purchased an Orion Thin Off-Axis Guider (TOAG). This enables me to contain both the main DSLR and CCD cameras on the same focuser, freeing up my guide scope. Testing has been positive thus far.
The TOAG is solid metal: it is very sturdy and will handle the load of a more solid CCD camera such as my Meade DSI II. This is just what I needed for my big Newtonian. “It’s ideal for use with Newtonian reflector telescopes which have limited “back focus” travel” (Orion, 2013). My Schmidt-Newtonian does indeed have limited focuser travel and this item has fit the need quite well. I assembled the item and pointed the telescope out the window and targeted a terrestrial target (a telephone pole). The focus of the two cameras did not match: after adjusting the TOAG I was able to obtain focus on the CCD. It did take some experimenting with the extra included spacers: “[a] C-mount to T-threads adapter, Canon DSLR bayonet adapter, Camera T-adapter, ultra-thin M48 male to T-adapter female adapter, 3mm Coma-Corrector spacer, 18mm spacer, and a 2″ nosepiece” (Orion, 2013) are included to get the right fit.
Now that piggy-backed refractor scope is freed up for visual observing.
Orion. 2013. Orion Thin Off-Axis Guider for Astrophotography. Retrieved November 17, 2013 from http://www.telescope.com/Orion-Thin-Off-Axis-Guider-for-Astrophotography/p/102812.uts
Since Fall is officially here, the annual evil weather came with it – resulting in cloudy and rainy conditions. Observing is postponed often this time of year. Meanwhile I post other astronomical content. Here is a video from NASA of the latest flyby of the asteroid Vesta: Click here.
The Dawn Mission: NASA mission to this object: http://dawn.jpl.nasa.gov/
Throughout the 2013-2014 Winter season, I have decided to observe and photograph the area of circumpolar sky above 60Deg North latitude. I like to challenge my self on finding and documenting faint and difficult-to-find targets in unpopular parts of the sky. Who knows – I might get lucky and actually discover a nova or asteroid in this area. Documentation of each constellation will appear under the Research Projects tab on this site. See the Circumpolar! page for details.
November 3, 2013
Another one of those nights that nothing works right – we all have those…
32-degree F temperature outside. Clear. Had some issues with my auto-guider, a Meade DSI II CCD camera attached to a 3″ refractor auto-guide scope. The 15′ USB extension has too much attenuation as it is transferring data for both the DSI and the Cannon Rebel T3 DSLR. The Cannon had to issues at all, but the DSI live view was nothing but noise most of the time. I had determined that this was due to the reduced voltage going to it. I was forced to observe without an auto-guider: not fun.
I am ordering a new Tripp Lite 10-meter USB2.0 A/A Hi-Speed Active Extension / Repeater Cable. The ACTIVE means that is has integrated circuitry that will manage the power along the run. This should clear up things a bit.
Some changes have been made.
The Meade DSI II CCD is now used as an auto-guider and is part of the piggy backed 3” refractor. The Crayford motorized focuser is still doing its job superbly, and a new focus mask helps with the initial focus to give me sharp focus.
The Crayford 2” focuser can handle a lot of weight and always holds its focus: it is very solid and will serve me for decades to come. As you can see, I have flipped the OTA by 90deg because of balance issues, and now with the weight of the focuser and camera the weight is more evenly distributed and equal to the finder scope on the other end of the plane.
The guide scope rings and base plate have been replaced with a lighter replacement from SCOPESTUFF.COM as well as the new 6” counterweight extension. This telescope was a little top heavy so instead of adding more weight to the mount (as it is at its limit with this big 10” scope), I simply obtained the extender to more shift and distribute the counter weight. To further reduce the load on the mount motors, I enabled the quiet slew option which enables a slower skew: I am not in a hurry.
Now to get one of those new Meade LX850 series mounts…