(meteorobs) Obs: 13 Aug 2009 UT

[David Oesper]

13 Aug 2009 0405-0936 UT (CDT 12 Aug 11:05 p.m. - 13 Aug 4:36 a.m.)

David Oesper
NW of Dodgeville, Wisconsin
43 00 39.5 N, 90 16 05.4 W, ~1110 ft.
Method: Visual, digital voice recorder, talking clock

P = Perseids
S = Others or Sporadic

0405 begin session; moon's up; facing Vega; sky clear; winds nearly calm; Milky Way easily visible
0405-0415: 1P; 0408;
0409 sky brightness: zenith SQM 21.21 ~6.2; viewing direction (45 deg.) SQM 21.15 ~6.2
0415-0430: 11P, 1S ; 0418; 0419; 0420; 0420; 0422; 0423 S; 0425; 0426; 0427; 0428; 0428; 0429
0430-0445: 16P, 1S ; 0430; 0433; 0434; 0434; 0434; 0435; 0436; 0437; 0438; 0438; 0440; 0440; 0441; 0441 S; 0442; 0444; 0444
0445-0500: 5P; 0448; 0448; 0452; 0455; 0458; fatigue or real lull?
0500-0515: 16P ; 0500; 0500; 0501; 0504; 0504; 0504; 0506; 0507; 0507; 0510; 0510; 0511; 0513; 0513; 0514; 0514
0510 one nice feature of so many Perseids having trains is that if you miss the main meteor you often have time to see the train
0515-0530: 10P ; 0515; 0516; 0517; 0520; 0524; 0527; 0527; 0528; 0528; 0529
0530-0545: 18P ; 0530; 0530; 0531; 0531; 0534; 0534; 0537; 0537; 0538; 0538; 0538; 0539; 0539; 0540; 0541; 0543; 0545; 0545
0545-0600: 14P ; 0546; 0548; 0548; 0550; 0551; 0552; 0552; 0552; 0554; 0554; 0554; 0558; 0558; 0559; 
0600-0615: 16P. 1S ; 0600; 0601; 0601; 0601; 0602; 0606; 0608; 0608; 0609; 0609; 0609; 0610; 0610; 0612; 0613; 0614; 0614 S
0601 begin housekeeping break (HB)
0605 end HB
0615-0630: 13P ; 0615; 0615; 0616; 0616; 0617; 0617; 0618; 0620; 0621; 0622; 0628; 0629; 0629
0630-0645: 4P ; 0633; 0634; 0638; 0638; fatigue or real lull?
0645-0700: 2P ; 0648; 0655; fatigue or real lull?
0700-0715: 14P ; 0700; 0701; 0703; 0704; 0704; 0704; 0706; 0708; 0708; 0709; 0710 -3 bluish, 10s train, ended low in the west in N Oph; 0710; 0711; 0713 
0703 sky brightness: viewing direction (45 deg.) SQM 20.30 ~5.7
0715-0730: 8P; 0716;  0718; 0720; 0723; 0724; 0724; 0724; 0725
0730-0745: 10P ; 0730; 0730; 0730; 0732; 0732; 0732; 0732; 0733; 0735; 0741
0745-0800: 7P; 0745; 0745; 0745; 0750; 0752; 0758; 0759
0800-0815: 2P; 0807; 0810; fatigue 0800-0900 or real lull?
0802 sky brightness: viewing direction (45 deg.) SQM 20.17 ~5.7
0803 begin HB
0805 end HB; facing Deneb and Vega; MW still visible in Cyg
0815-0830: 1P; 0819
0830-0845: 1P ; 0832
0845-0900: 0P
0900-0915: 9P ; 0901; 0901; 0908; 0908; 0909; 0910; 0911; 0912; 0914
0901 sky brightness: viewing direction (45 deg.) SQM 20.08 ~5.6
0905 clouds slowly advancing, still low in the west; MW in Cyg still visible
0915-0930: 7P; 0916; 0918; 0919; 0921; 0922; 0923; 0926 -1 at least 5s train
0936 1P
0936 end of session

many 0 and negative-magnitude meteors tonight!

Limiting Magnitude = [(SQM-8.89)/2]+ 0.04
SQM = Sky Quality Meter