NLC 2009-06-21/22
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: 2009-06-21/22
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
----- ----- ------ ------- ---- ---- --------------------------------
21:40 X cloud
21:45 X cloud
21:50 X cloud
21:55 X cloud
22:00 X cloud
22:05 X cloud
22:10 X cloud
22:15 X cloud
22:20 X cloud
22:25 X cloud
22:30 X cloud
22:35 X cloud
22:40 X cloud
22:45 X cloud
22:50 X cloud
22:55 X cloud
23:00 X cloud
23:05 X cloud
23:10 X cloud
23:15 X cloud
23:20 X cloud
23:25 X cloud
23:30 X cloud
23:35 X cloud
23:40 X cloud
23:45 X cloud
23:50 X cloud
23:55 X cloud
00:00 X cloud
00:05 X cloud
00:10 X cloud
00:15 X cloud
00:20 X cloud
00:25 X cloud
00:30 X cloud
00:35 NLC through small gap in cloud
00:40 NLC through small gaps in cloud
00:45 NLC through small gaps in cloud
00:50 X cloud
00:55 X cloud
01:00 X cloud
01:05 X cloud
01:10 X cloud
01:15 X cloud
01:20 X cloud
01:25 X cloud
01:30 X cloud
01:35 X cloud
01:40 X cloud
01:45 X cloud
01:50 X cloud
01:55 X cloud
02:00 X cloud
02:05 X cloud
02:10 X cloud
02:15 X cloud
02:20 X cloud
02:25 X cloud
02:30 X cloud
02:35 X cloud
02:40 X cloud
02:45 X cloud
02:50 X cloud
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: very weak
2: clearly detected
3: clearly visible
4: very bright
5: extremely bright
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: 2009/06/21-22
Start: 00:35
End: 00:45
Forms: NLC
Max elevation:
Max brightness:
Comments:
Cloud gap only.
<a href="http://www.chiandh.me.uk/p/NLC_2009-06-21/22>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 ----- ------ ----- ----- ----- ----- ----- ----------- 00:35 8.000 4.7 -10.5 -2.3 25.3 0-255 q3197.jpg 00:40 8.000 5.9 -10.5 -2.2 26.3 0-255 q3201.jpg 00:45 8.000 7.1 -10.4 -2.2 27.7 0-255 q3205.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).
