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To celebrate the 25th anniversary of Sir Patrick's DSO catalogue, I've added the available Caldwells to my basic Marathon search sequence.
Those interested may be pleasantly surprised by how many of the additional treasures are only a short hop from a given (or en route to the next) Messier.
The sequence for 40°N can be found at the SEDS Messier Marathon homepage or at my blog.
At long last I have managed to image Caliban, also known as Uranus XVI. It is a small (circa 72km) outer satellite of Uranus which was discovered in September 1997 using the Hale 5m telescope at Palomar. Incidentally, Sycorax (U-XVII)was discovered in the same observing session. That satellite is around 1.7 magnitude brighter and so much easier to observe.
Although a three hours exposure, unfiltered for maximum sensitivity, was used the signal to noise ratio is barely 3 and serious image processing was needed to produce a relatively clear image. Even so, it is not especially obvious. The reason is that the MPOC ephemeris predicts that the satellite has a magnitude of 22.2 at the time of observation. More information is available at http://www.astropalma.com/Projects/Satellites/caliban.html
This is my third Uranus capture this season. I am much happier with this result.
The seeing helped a lot and the sky quality was favorable.
This image is the result of 5 de-rotated videos on Winjupos, all captured with IR742 filter. The result was used as luminance in the composition. RGB came from a normal color capture.
Following the images of other friends, we can notice the atmospheric activity on the planet. It seems to be changing every week. Many changes can still happen until the opposition.
Hello stargazers, welcome. I had posted a picture yesterday of Uranus that had appeared to show its rings. I am using a Nexstar 4se, a 2x Barlow, and my Neximage Burst Color and capturing hundreds of photos and stacking them for my results. But still had me and others curious to if I were actually seeing the rings of Uranus or maybe just a glare of some sort.
So I got back out there this morning, might I note I live in FL where the weather tends to stay hot so clear imaging during this time of year can be difficult, but not impossible as this image that I stacked 150 out of 300 images taken may show that statement holds true..............or I could just be mistaken the object in the image, but all in all I am feeling pretty confident that I have a decently clear image(stacked 150 images) of Uranus, its rings, and one of it's distant moons. It may be necessary to zoom in on my photo in order to see the moon it should be down and to the right of the planet a good distance in relation to the size of planet, I noticed that looking at Uranus in the photo helped bring the moon out just like stargazing in real-time.
If anyone can better distinguish what I might have done right or wrong here any help would be appreciated (also forgot to change format save for my images so I am stuck with .bmp and setting it as a download, sorry for any inconvenience.) - - - J47(JAY)
Hi everyone I managed to wake up early this morning and get a great image processed using Registax6.1 of Uranus. I am new to astrophotography but enjoying every second of it. I have a Nexstar 4se that I used to capture these images with also increased my zoom by using a 2x Barlow. Only through my Neximage Burst Color (in which was used to take the images) was I able to make out to hazy blue planet best. Using iCap2.4 software for capturing the images heres what I did.....
- Images taken and processed September 4, 2019 around 5:00 A.M.- 5:30 A.M.
- decreased the gain to around 330-380 while exposure was set to 27 fps
- adjusted my focus
- took 200 frames at 25 fps
Continuing to Registax I processed the images only using the best frames out of 100, I added a few prefilters: BLUR was adjusted slightly to around 10-15, SMOOTH was decreased by around 5, and contrast prefilter, forget what it was called, was reduced to .90.
I tuned the wavelets until the hazy spot between the rings and planet were no longer visible and the difference with the rings and planet begin to appear. Here's the results hope they are as cool to everyone else, as I find it amazing my 4se can see that much into detail.