First and foremost observing love: naked eye.
Last but not least, telescopes.
And I sometimes dabble with cameras.
Quote:This also helps explain why people in the South complain how terrible their red-zone sites are, whereas I have so far said "Oh, the red zone isn't so bad." It's because what I thought was red zone should actually be orange.
Quote:I wonder what caused the huge increases in southeastern Oregon and southeastern Utah. There's kinda like nothing there in either place. Having just been in southeastern Oregon (Steens Mountain) I can vouch that it's still super-dark.
Quote:Now all we have to do is to keep that pesky snow away.
Quote:The discrepancy could be caused by a variety of different things: 1) the day Tony took measurements could have been especially clear of aerosols ... 2) other parameters in the model just need to be "tuned", 3) the assumed relationship between the satellite brightness and the light sources needs to be modified or 4) something is more fundamentally wrong with the model.
"Great men are forged in fire. It is the privilege of lesser men to light the flame." --John Hurt, as The War Doctor12" f/4.9 Skywatcher Collapsible Dobsonian8" f/4.9 Orion Newtonian on alt-az mountOberwerk 15x70 BinocularsMinimalist Eyepiece Collection: 30mm ES-82, 22mm Vixen LVW, 14mm Delos, 10mm Delos, 7mm Pentax XW, 2X GSO 2" ED Barlow, 3X Explore Scientific Focal Extender, 4X Powermate
George N Obsession 20 Optical Guidance Systems 10" F/9 R-C Cass 6" F/5 & 8" F/8 home-made Newts Explore Scientific 127mm ED MI-250 mount Denk II bino-viewer, with PowerX and Newt reducer, Member, International Dark-Sky Association
DreamCatcher Dobservatory/AstroTech 16" dob.
Quote:Sure, no problem!I've now added a link to the new atlas as an overlay in Google Maps. You can also access this from the main webpage. ...-Dave
Matt 12" f/4.9 custom strut Dob 3" f/6 Edmund Scientific Newt 8x56 binos My Gallery
NP-101 on a DM-6
Teeter 11" STS/Waite Mirror
Zeiss, Fujinon, Nikon, Vixen binoculars
Quote:The issue of sky brightness' lack of correlation with the satellite light maps is well-known ... That factor seems to make any sort of absolute light pollution map unlikely unless you have annual averages for each site correlated to a color map.
C10NGT, Z8, 150 Rumak, XLT 150, C6, C5, SW5 Newt, 4.5 Ball, C102GT, C90, ST80, A70LF; 15x70, 25x100; Burgess BV; Paracorr II; T6 2.5, XO 2.58/5.1, Ethos-SX 3.7, Delos 4.5, TV Plossl 7.4-26, BCO 10, Hutech HC 12.5, Sterling 12.5-25, ES100 14, CZJ H 16/25, CZJ O 16, M5k UWA 24, T5 31, Ultrascopic 35, Titan-II 40; Bino Pairs M5k UWA 6.7, Baader Zoom 8-24, M5k SWA 24, TV Plossl 26, RKE 28.7; Zooms NZ 2-4, NZ 3-6, Leica ASPH 8.9-17.8, Baader 8-24; Baader Zoom Barlow, VIP Barlow
Quote:I have noticed that at my dark sky site, often the sky is more transparent when it is very dewy at groundlevel, and less transparent when it is not so dewy.
Quote:In the southwest, my neck of the woods, light pollution seems to relate extremely well to humidity in the lower atmosphere. We have the greatest amount of dust in the lower atmosphere when it is dry and windy, yet the brightest skies are when the humidity near the ground creeps up.So a site that is in, for instance, a red zone, might get a reading of 16.8 when the humidity is high, and a reading of 17.5 when the humidity is low.