NLC 2009-06-10/11
From chi and h
Contents |
BAA report
The report to the BAA Aurora Section gives an overview of the night, which times were cloudy, free of NLC, or with sightings of NLC.
Name of observer: Horst Meyerdierks
Location: Royal Observatory Edinburgh, 55.9N 3.2W
unattended dSLR with limited field of view A ~325-35, h ~0-40
images every 5 min
Date: 2009-06-10/11
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
----- ----- ------ ------- ---- ---- --------------------------------
21:35 X thick cirrus
21:40 X thick cirrus
21:45 X thick cirrus
21:50 X thick cirrus
21:55 X thick cirrus
22:00 X thick cirrus
22:05 X thick cirrus
22:10 X thick cirrus
22:15 X thick cirrus
22:20 X thick cirrus
22:25 X thick cirrus
22:30 X thick cirrus
22:35 NLC? through cloud gap
22:40 NLC through cloud gap
22:45 NLC? through cloud gap
22:50 NLC? through cloud gap
22:55 NLC cloudy
23:00 NLC 2 cloudy
23:05 NLC 2 cloud to h 5, to h 15 on right
23:10 II,III 2 15 <5 <325 >15 cloud to h 5
23:15 II,III 2 15 <5 <325 >20 cloud to h 5
23:20 II,III 2 15 <5 <325 >15 cloud to h 5
23:25 II,III 2 15 <5 <325 >25 cloud to h 5
23:30 II,III 2 15 <5 <325 >25 cloud to h 5, patches of cirrus
23:35 NLC 2 cloud to h 5, patches of cirrus
23:40 NLC cloud to h 5, patches of cirrus
23:45 NLC cloud to h 5, patches of cirrus
23:50 NLC through cloud gap
23:55 NLC through cloud gap
00:00 NLC through cloud gap
00:05 NLC through cloud gap
00:10 NLC through cloud gap
00:15 NLC through cloud gap
00:20 NLC through cloud gap
00:25 NLC through cloud gap
00:30 camera failure, no further images
forms: I: veil
II: bands
III: waves
IV: whirls
NLC: other than or multiple of I-IV
0: no NLC
X: no decision possible (mist, cloud etc.)
brightness: 1: only in binoculars
3: intensely bright and vivid
2: else
NLCnet report
The periods of positive sightings of NLC are reported to the NLC Observers' Home Page:
Name: Horst Meyerdierks
Country: Scotland
Location: Edinburgh
Date: 2009/06/10-11
Start: 22:35
End: 00:25
Forms: II, III
Max elevation: 15
Max brightness: 2
Comments:
<a href="http://www.chiandh.me.uk/p/NLC_2009-06-10/11>Images</a>.
forms: I: veil
II: bands
III: waves
IV: whirls
O: other than or multiple of I-IV
brightness: 1: very weak
2: clearly detected
3: clearly visible
4: very bright
5: extremely bright
Images
Listed below are the images with positive sightings of NLC. These have been processed merely to adjust the brightness for underexposure.
UT exp A hSun h15 h85 stretch image ----- ------ ----- ----- ----- ----- ----- --------- 22:35 2.000 337.5 -8.3 -0.7 135.0 0-150 q2224.jpg 22:40 2.000 338.6 -8.6 -0.9 122.1 0-150 q2225.jpg 22:45 2.000 339.7 -8.9 -1.1 105.5 0-130 q2226.jpg 22:50 4.000 340.9 -9.1 -1.3 87.0 0-200 q2227.jpg 22:55 4.000 342.0 -9.3 -1.4 70.0 0-200 q2228.jpg 23:00 4.000 343.2 -9.5 -1.6 56.6 0-200 q2229.jpg 23:05 4.000 344.3 -9.7 -1.7 46.9 0-150 q2230.jpg 23:10 4.000 345.5 -9.9 -1.8 39.9 0-150 q2231.jpg 23:15 4.000 346.6 -10.1 -2.0 34.7 0-150 q2232.jpg 23:20 8.000 347.8 -10.2 -2.1 31.0 0-200 q2233.jpg 23:25 8.000 348.9 -10.4 -2.2 28.1 0-150 q2234.jpg 23:30 8.000 350.1 -10.5 -2.2 25.8 0-150 q2235.jpg 23:35 8.000 351.3 -10.6 -2.3 24.1 0-150 q2236.jpg 23:40 8.000 352.4 -10.7 -2.4 22.7 0-150 q2237.jpg 23:45 8.000 353.6 -10.8 -2.4 21.6 0-150 q2238.jpg 23:50 8.000 354.8 -10.9 -2.5 20.8 0-150 q2239.jpg 23:55 8.000 355.9 -10.9 -2.5 20.2 0-130 q2240.jpg 00:00 8.000 357.1 -11.0 -2.5 19.7 0-130 q2241.jpg 00:05 8.000 358.3 -11.0 -2.6 19.4 0-130 q2242.jpg 00:10 8.000 359.5 -11.0 -2.6 19.3 0-130 q2243.jpg 00:15 8.000 0.6 -11.0 -2.6 19.3 0-130 q2244.jpg 00:20 8.000 1.8 -11.0 -2.6 19.4 0-100 q2245.jpg 00:25 8.000 3.0 -11.0 -2.5 19.8 0-130 q2246.jpg exp: Exposure time in seconds (200 ISO, f/3.5). A: Azimuth of the Sun (degrees). hSun: Altitude of the Sun (degrees, negative below horizon). h15: Max. altitude of sunlight at 15 km height (degrees). h85: Max. altitude of sunlight at 85 km height (degrees). stretch: Contrast stretch (0-255 means no stretch).
