The Aurigids put on a reasonably entertaining meteor shower, comparable to this year's rather average Perseids. I observed from 1100 to 1210 Universal Time...
I counted 17 Alpha Aurigid meteors from 4:15 - 5:15 AM MST (11:15 - 12:15 UT). About half of those were around 1st to 2nd magnitude, with the rest being 3rd ...
Hi Owen, With 1143 findercharts, I guess they will miss a thing or two. I'm headed out to Navajo Flats tonight to try a few MASH PNe which had a strong O-III...
Kent Wallace
kwwallace@...
Sep 2, 2007 4:46 pm
20112
To All, With enough food slid under the door and an intravenous delivery of coffee, I've come up with a spreadsheet program for stellar extinction as a...
Roy Garstang has worked over all this in rather gory detail. Look him up at ADS to see the long series of papers on the general topic of...
Brian Skiff
bas@...
Sep 2, 2007 8:20 pm
20115
You might remember a simple question I posed some time ago that elicited a number of very thoughtful detailed responses. I created a presentation that I've...
I've tried several times to post to the group, but the messages never appear. Anyhow... Observing from Cottage Grove Lake in Oregon, I saw the peak at 4:05 to...
Observing from Cottage Grove Lake, Oregon, the peak appeared to be 4:05-4:10am when a burst of a dozen meteors, half faint, half bright occurred within a...
I don't think that Ground Based AStronomy will be impossible everywhare by 2050, just lots of major areas, in other word, not as many areas to perform...
... I'm sorry to say this, but to me this looks just like a satellite. Meteors give trails that get gradually stronger, then sometimes a sharp flash, and then...
Guys Just join the refugees from light pollution who get their astronomy fix by visiting Australia where lots of dark sky can still be found- like 21.6 to 21.7...
I'm not so sure of that conclusion. First, at 18mm for 30 seconds that would be a very slow moving satellite...maybe too slow. (Maybe that depends on your...
Last night I hauled my 20" f/5.0 reflector to Navajo Flats. California, to try out some MASH PNe which I thought might be good targets and found a real winner...
Kent Wallace
kwwallace@...
Sep 3, 2007 5:28 pm
20124
Brian, Thanks for the references; I'll be doing a little digging. One of the issues with modeling skyglow based on aerosols is knowing the vertical...
I hauled my 20" f/5.0 reflector out to Navajo Flats last night and tried 7 MASH PNe. Only one of them gave a positive observation. All the rest were...
Kent Wallace
kwwallace@...
Sep 4, 2007 4:45 pm
20126
... I think to make it tractable analytically, Roy Garstang had to assume something relatively simple like a uniform slab of 'crud'. \Brian...
Brian Skiff
bas@...
Sep 4, 2007 7:44 pm
20127
... Kent, what are the units here? They seem to be on a linear scale, maybe real physical units?! (uncommon in astronomy...) \Brian...
Brian Skiff
bas@...
Sep 4, 2007 7:48 pm
20128
I believe these are raw counts. They do not yet have the flux calibrated spectra. That will come Owen ... Owen Brazell...
Hi Brian, I have no idea. The scales weren't labeled for the on-line spectra and I don't have access to the paper. Basically I was clicking on the finder...
Kent Wallace
kwwallace@...
Sep 4, 2007 11:01 pm
20130
Brian is likely right... you have to start assuming all sorts of things if it is not a slab. Vertical distribution is indeed an important aspect. You'll find...
... Things like this are already done in radiative transfer models, which is what is needed for this kind of sophistication. Programs like MODTRAN may be...
Reading King's History of the Telescope, I learn that Struve nailed a pile of close doubles in St. Petersburg with a 15" starting in about 1840. Is the seeing...
I found a link from Barbara Wilson's website that had a chronological list of the discovery of the galactic globulars. Anyway, I can't find the link anynmore(I...
Cliff, You can find her "Timeline of Catalogues to Explore the Deep Sky" at http://home.ix.netcom.com/~bwilson2/barbarasweb/History.htm Kenneth Drake...
... It's probably a combination of doing lots of observing and sheer patience, waiting for good seeing to come along---but mainly just lots of eyepiece time. ...
Brian Skiff
bas@...
Sep 5, 2007 7:38 pm
20137
Greg, perhaps you're comparing apples and oranges. Struve's scope at Pulkowa Observatory was a 15-inch *refractor*, of focal length about 20 feet, which was...
