dark impact mark on jupiter
Posted 06 August 2009 - 08:31 AM
Frank, I missed seeing your sketch when you posted it--nice detail in your observation and sketch. You caught the impact scar at a difficult time to observe it--it's a lot harder to see now when it's on the limb--great work!
Posted 06 August 2009 - 08:52 PM
Posted 10 August 2009 - 10:26 AM
I observed the impact scar on Jupiter this morning (right around midnight local time). The seeing was not the best, but I could see the dusky area OK in steady moments, especially with the Wratten #56 (green) filter.
The Jovian winds appear to be stretching and pushing it a good ways towards celestial west (preceding side)--it was very elongated. It appeared darkest toward the following end (where the strike originally hit). I could not detect any individual components of the scar which have been reported by imagers.
I decided to just focus on the Jovian southern hemisphere in this sketch, especially since the seeing wasn't the best. Once again, I used 2B and HB pencils and Sol's template on photocopy paper.
Still an interesting sight.
Posted 10 August 2009 - 04:22 PM
Posted 10 August 2009 - 05:04 PM
Very nice sketch update. Most summers here we get good cooperation from the weatherman, but not this year.
Thank you for posting this very fine sketch.
Posted 12 August 2009 - 10:05 PM
Posted 17 August 2009 - 11:25 AM
I had excellent seeing conditions and much lower humidity last night for this observation. I used my 6" refractor at 280x and a nebula filter.
I believe the impact area to be on the upper left in the sketch as it appeared to be an elongated, darkish and irregular band in te NPR It just didn't exactly superimpose itself on the somewhat lighter pre-existing band located there.
Tonight also presented the NTeB with a rift instead of a single fuzzy band.
I guess at this point the impact sight will fade significantly.
I used 4H and 2H pencils with the darkest features using a HB.
Posted 17 August 2009 - 01:05 PM
you were able to push the magnification to an unusually high 280x i see from your report. i often can't go much higher than 200x, your seeing must have been excellent indeed
how high was Jupiter at the time of your sketch?
Posted 17 August 2009 - 01:25 PM
I hardly ever get to go above ~225x for Jupiter, so this was a rare exception. I guess Jupiter was over 1/3 up approaching meridian.
BTW, does any know where there is accurate Jupiter previewing freeware? My old program seems to have gone wacky.
Posted 17 August 2009 - 01:59 PM
Excellent sketch! You captured that concentration in the SEB following the Great Red Spot as well as the disturbance in the South Tropical Zone also following the GRS. I've seen them in images but haven't been able to detect them visually--perhaps they require the excellent seeing that you enjoyed.
I observed Jupiter and the WIS a little after you did (from 1:25-2:15AM local). I agree, the impact is dimming significantly. I didn't make a sketch but posted a report on the Dark Impact thread in the SSO forum.
I use the WIMP program written by Jeff Beish for planets but I don't remember where I downloaded it. Maybe the MarsObservers Cafe or the International Mars Patrol?
Posted 17 August 2009 - 04:15 PM
I'll try to find the programs you recommended.
Posted 17 August 2009 - 11:20 PM
Impressve detail in your Jupiter sketch above.
Posted 18 August 2009 - 01:23 PM
An outstanding observation of Jupiter showing a wealth of detail, including the Wesley Comet Impact Scar (WCIS). You have recorded interesting detail over the North Equatorial Belt (NEB) and South Equatorial Belt (SEB). The South Temperate Bely (STB) extending into the South Tropical Zone (STrZ) is interesting as well. The Great Red Spot (GRS) appears homogenous with a darkened southern border. The WCIS appears very elongated but noticeable over the South Polar Region (SPR). Thank you for sharing it with us all.
Posted 18 August 2009 - 05:14 PM
Posted 19 August 2009 - 06:05 AM
The impact site is certainly an interesting event.