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Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | (show all) Chris Schroeder Postmaster Reged: 12/11/04 Posts: 8515 Loc: N.E. WI Sky Glow Re: SQM data thread [Re: mistyridge]       #1336009 - 01/02/07 12:25 PM Edit   Reply   Quote Quick Reply   12/27-12/31 overcast 1/1/07 -6°C 76%RH clear 1800-15.76, 2000-15.20 & 2130-15.02 nearly full moon rising -------------------- Chris Mallincam Color Hyper Plus 10" DSH with SC DSC, CPC 800 XLT AT 111EDT, AT 102Achro, ZS80FD 10th Anniv, AT 72ED, ZS66SD, PST CG5-AGT, EZ-Touch, Voyager POD XL3 Post Extras:       Starman1 Vendor (EyepiecesEtc.com) Reged: 06/24/03 Posts: 17639 Loc: Los Angeles Re: SQM data thread [Re: Chris Schroeder]       #1336158 - 01/02/07 01:52 PM Edit   Reply   Quote Quick Reply   Having observed many places and having measured sky brightness under many different skies, I'd like to propose that it is not dark enough to do any Deep-Sky observing if the sky is brighter than about magnitude 19.5 per square arc-second. Yes, you can see stars if the sky is brighter than that, so double star and variable star work can be done, but the diminishment of the views of deep-sky objects reduces the size of the scope tremendously. I don't know how you all feel, but if my 12.5" can't even outperform a good 70mm refractor at a dark site (when the 12.5" is being used under a brighter sky, that is),I don't really see any point to doing it except as a limiting magnitude exercise. Viewing really doesn't get good until about magnitude 20.5, and is a lot more fun after magnitude 21.0. Each half magnitude darker at this point has profound effects where the quality of the image is concerned. And the quality of views really improves around 21.5. At that point, the limitation on the scope's performance is the aperture, coatings, and clarity of the air. I regularly measure magnitude 17.5 at my home in LA and that is a sort of "permanent twilight". To those of you measuring even brighter skies, I humbly express my condolences. -------------------- Don Pensack www.EyepiecesEtc.com 12.5" Teeter/Zambuto, 5" Maksutov Sustaining Lifetime IDA member Post Extras:       csa/montana Den Mama Reged: 05/14/05 Posts: 76331 Loc: montana Re: SQM data thread [Re: Chris Schroeder]       #1336259 - 01/02/07 03:05 PM Edit   Reply   Quote Quick Reply   12/28/06 - 1/1/07 Complete overcast, moon almost full. Carol -------------------- Carol AstroTech 16" Dob (Thanks ASTRONOMICS!) Vixen 80MF Masayumas 7.5,15,25W,35 Pentax XW5,10; XL7 TV22Pan ES30 Paradigm 8,12,18 DreamCatcher Dobservatory Post Extras:       mistyridge Carpal Tunnel Reged: 10/28/05 Posts: 2896 Loc: Loomis, CA Re: SQM data thread [Re: csa/montana]       #1336583 - 01/02/07 06:29 PM Edit   Reply   Quote Quick Reply   12/29-01/01/07-moon light and thin overcast. -------------------- Mike F Misty Ridge Observatory Skyshed POD Many scopes 70mm to 12.5", SCTs, refractors, and newts and a lot of other astro stuff. Post Extras:       Chris Schroeder Postmaster Reged: 12/11/04 Posts: 8515 Loc: N.E. WI Sky Glow Re: SQM data thread [Re: mistyridge]       #1336841 - 01/02/07 08:52 PM Edit   Reply   Quote Quick Reply   1/2/07 1950 0°C 53%RH Clear 15.80 -------------------- Chris Mallincam Color Hyper Plus 10" DSH with SC DSC, CPC 800 XLT AT 111EDT, AT 102Achro, ZS80FD 10th Anniv, AT 72ED, ZS66SD, PST CG5-AGT, EZ-Touch, Voyager POD XL3 Post Extras:       UpNorthLibrarian sage Reged: 04/18/05 Posts: 424 Loc: 36.02N / 78.9 W (no longer: 4... Re: SQM data thread [Re: Chris Schroeder]       #1337212 - 01/03/07 12:50 AM Edit   Reply   Quote Quick Reply   1/2/07 -- 44.3 N / 84.4 W ... 2345 local --- 32 degrees (f) ---full moon --- SQM 14.50 - 15.10 Shadows from the moonlight. But no clouds!! -------------------- 'True observation begins when one is devoid of set patterns' Li Jun Fan 203mm DBA Certified Dob AT-80mm Refractor w/Vixen Icarus D Alt/Az Mount 10x30 Canon IS Binos 9x60 Obies 8x42 Obies Post Extras:       Chris Schroeder Postmaster Reged: 12/11/04 Posts: 8515 Loc: N.E. WI Sky Glow Re: SQM data thread [Re: UpNorthLibrarian]       #1338854 - 01/03/07 09:14 PM Edit   Reply   Quote Quick Reply   1/3/07 2010 4.3°C 47% few clouds 16.24 full moon at 40° -------------------- Chris Mallincam Color Hyper Plus 10" DSH with SC DSC, CPC 800 XLT AT 111EDT, AT 102Achro, ZS80FD 10th Anniv, AT 72ED, ZS66SD, PST CG5-AGT, EZ-Touch, Voyager POD XL3 Post Extras:       csa/montana Den Mama Reged: 05/14/05 Posts: 76331 Loc: montana Re: SQM data thread [Re: Chris Schroeder]       #1339021 - 01/03/07 10:21 PM Edit   Reply   Quote Quick Reply   1/03/07 20:30; 39°F; NE Helena 10%clouds moon, full, 17.30 -------------------- Carol AstroTech 16" Dob (Thanks ASTRONOMICS!) Vixen 80MF Masayumas 7.5,15,25W,35 Pentax XW5,10; XL7 TV22Pan ES30 Paradigm 8,12,18 DreamCatcher Dobservatory Post Extras:       mapofthedead super member Reged: 06/01/06 Posts: 155 Loc: Cambs, UK Re: SQM data thread [Re: csa/montana]       #1342622 - 01/05/07 05:12 PM Edit   Reply   Quote Quick Reply   05/01/07 - 2045 - Wisbech, UK - Clear, Waning gibbous Moon low in East - 5.4°C - 17.85 -------------------- You cannot teach a man anything; you can only help him discover it in himself. -- Galileo Galilei Post Extras:       mistyridge Carpal Tunnel Reged: 10/28/05 Posts: 2896 Loc: Loomis, CA Re: SQM data thread [Re: mapofthedead]       #1343533 - 01/06/07 02:15 AM Edit   Reply   Quote Quick Reply   1/5/07-1915-Loomis CA-clear,glow of moon just before rise -36*F-19.21 -------------------- Mike F Misty Ridge Observatory Skyshed POD Many scopes 70mm to 12.5", SCTs, refractors, and newts and a lot of other astro stuff. Post Extras:       csa/montana Den Mama Reged: 05/14/05 Posts: 76331 Loc: montana Re: SQM data thread [Re: mistyridge]       #1343842 - 01/06/07 10:02 AM Edit   Reply   Quote Quick Reply   1/04/05 -total overcast -wanning gibbous 1/05/05-total overcast-wanning gibbous -------------------- Carol AstroTech 16" Dob (Thanks ASTRONOMICS!) Vixen 80MF Masayumas 7.5,15,25W,35 Pentax XW5,10; XL7 TV22Pan ES30 Paradigm 8,12,18 DreamCatcher Dobservatory Post Extras:       mapofthedead super member Reged: 06/01/06 Posts: 155 Loc: Cambs, UK Re: SQM data thread [Re: csa/montana]       #1344257 - 01/06/07 01:41 PM Edit   Reply   Quote Quick Reply   06/01/07 - 1830 - Wisbech, UK - Clear - 6.4°C - 18.3 -------------------- You cannot teach a man anything; you can only help him discover it in himself. -- Galileo Galilei Post Extras:       csa/montana Den Mama Reged: 05/14/05 Posts: 76331 Loc: montana Re: SQM data thread [Re: mapofthedead]       #1345139 - 01/06/07 09:46 PM Edit   Reply   Quote Quick Reply   1/06/07 -19:30- 18°F - NE Helena- Clear/moon below horizon - 21.17 -------------------- Carol AstroTech 16" Dob (Thanks ASTRONOMICS!) Vixen 80MF Masayumas 7.5,15,25W,35 Pentax XW5,10; XL7 TV22Pan ES30 Paradigm 8,12,18 DreamCatcher Dobservatory Post Extras:       snorkler Aperture Aficionado Reged: 10/11/04 Posts: 10041 Loc: Bay Area, California Re: SQM data thread [Re: csa/montana]       #1345221 - 01/06/07 10:55 PM Edit   Reply   Quote Quick Reply   1/06/07 -19:50- 43°F - 40 mi NE San Francisco- Semi-cloudy/moon below horizon - 17.55 -------------------- I'm not the lowest of the low, but I am the slowest of the slow. '06 Scion xB. 49.6 mpg avg over 38,000 miles. 177% of '08 EPA Best flat drive 94.5 mpg for 10.1 mi Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg Post Extras:       mistyridge Carpal Tunnel Reged: 10/28/05 Posts: 2896 Loc: Loomis, CA Re: SQM data thread [Re: snorkler]       #1345440 - 01/07/07 01:57 AM Edit   Reply   Quote Quick Reply   1/6/07-19:30-40*F-Loomis CA-20%thin high cirrus-19.32 -------------------- Mike F Misty Ridge Observatory Skyshed POD Many scopes 70mm to 12.5", SCTs, refractors, and newts and a lot of other astro stuff. Post Extras:       Chris Schroeder Postmaster Reged: 12/11/04 Posts: 8515 Loc: N.E. WI Sky Glow Re: SQM data thread [Re: mistyridge]       #1346080 - 01/07/07 01:02 PM Edit   Reply   Quote Quick Reply   1/4-5/07 Overcast 1/6/07 2115 -4.1°C 53% wanning gibbous moon 15° 18.36 -------------------- Chris Mallincam Color Hyper Plus 10" DSH with SC DSC, CPC 800 XLT AT 111EDT, AT 102Achro, ZS80FD 10th Anniv, AT 72ED, ZS66SD, PST CG5-AGT, EZ-Touch, Voyager POD XL3 Post Extras:       Chris Schroeder Postmaster Reged: 12/11/04 Posts: 8515 Loc: N.E. WI Sky Glow Re: SQM data thread [Re: Chris Schroeder]       #1346892 - 01/07/07 07:14 PM Edit   Reply   Quote Quick Reply   1/7/07 overcast 1810 2.5°C 74% 16.13 Just for comparison -------------------- Chris Mallincam Color Hyper Plus 10" DSH with SC DSC, CPC 800 XLT AT 111EDT, AT 102Achro, ZS80FD 10th Anniv, AT 72ED, ZS66SD, PST CG5-AGT, EZ-Touch, Voyager POD XL3 Post Extras:       Chris Schroeder Postmaster Reged: 12/11/04 Posts: 8515 Loc: N.E. WI Sky Glow Re: SQM data thread [Re: Chris Schroeder]       #1348951 - 01/08/07 07:18 PM Edit   Reply   Quote Quick Reply   1/8/07 1815 -5.2°C 66%RH 18.52 overcast 1/3 to the west -------------------- Chris Mallincam Color Hyper Plus 10" DSH with SC DSC, CPC 800 XLT AT 111EDT, AT 102Achro, ZS80FD 10th Anniv, AT 72ED, ZS66SD, PST CG5-AGT, EZ-Touch, Voyager POD XL3 Post Extras:       mistyridge Carpal Tunnel Reged: 10/28/05 Posts: 2896 Loc: Loomis, CA Re: SQM data thread [Re: Chris Schroeder]       #1349020 - 01/08/07 07:46 PM Edit   Reply   Quote Quick Reply   I/7/07 2010-35*F clear 19.41 -------------------- Mike F Misty Ridge Observatory Skyshed POD Many scopes 70mm to 12.5", SCTs, refractors, and newts and a lot of other astro stuff. Post Extras:       csa/montana Den Mama Reged: 05/14/05 Posts: 76331 Loc: montana Re: SQM data thread [Re: mistyridge]       #1349461 - 01/08/07 11:49 PM Edit   Reply   Quote Quick Reply   1/07/07 - 1/08/07 Total overcast -------------------- Carol AstroTech 16" Dob (Thanks ASTRONOMICS!) Vixen 80MF Masayumas 7.5,15,25W,35 Pentax XW5,10; XL7 TV22Pan ES30 Paradigm 8,12,18 DreamCatcher Dobservatory Post Extras:       Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | (show all)

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