
NLC 2013-06-12/13
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 compact camera with limited field of view A ~325-35, h ~0-40; images every 15 min Date: 2013-06-12/13 UT forms bright height azimuth comments ness top bot left rght e.g. weather -------- ----- ------ --- --- ---- ---- -------------------------------- 21:45:01 X widespread cloud 22:00:02 X widespread cloud 22:15:02 X widespread cloud 22:30:02 X widespread cloud 22:45:02 X widespread cloud 23:00:03 X widespread cloud 23:15:10 X widespread cloud 23:30:18 NLC? 1 10 -5 5 through cloud 23:45:09 NLC? 1 8 -15 0 through cloud 00:00:19 NLC 1 8 -35 through cloud 00:15:18 NLC? 1 through cloud 00:30:19 NLC 1 through cloud 00:45:19 NLC 2 through cloud 01:00:19 NLC 2 through cloud 01:15:18 NLC? 1 through cloud 01:45:03 X widespread cloud 02:00:06 X widespread cloud 02:15:02 X widespread cloud 02:30:01 X widespread cloud 02:45:01 X widespread 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: 2013/06/12-13 Start: 23:30 End: 01:15 Forms: NLC Max elevation: 10 Max brightness: 2 Comments: <a href="http://www.chiandh.me.uk/nlccam/20130612-13.shtml">Images</a>. Through cloud. 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. For some, there may also be an unsharp-masked version of the image.
UT exp A hSun h15 h85 stretch image (masked) -------- ------ ----- ----- ----- ----- ----- ------------------- 23:30:18 4.000 350.1 -10.4 -2.2 28.1 0-255 q4420.jpg m4420.jpg 23:45:09 2.000 353.6 -10.7 -2.4 23.3 0-255 q4423.jpg m4423.jpg 00:00:19 4.000 357.1 -10.8 -2.5 21.1 0-255 q4428.jpg m4428.jpg 00:15:18 4.000 0.6 -10.9 -2.5 20.7 0-255 q4433.jpg m4433.jpg 00:30:19 4.000 4.1 -10.8 -2.4 21.7 0-255 q4438.jpg m4438.jpg 00:45:19 4.000 7.6 -10.6 -2.3 24.6 0-255 q4442.jpg m4442.jpg 01:00:19 4.000 11.1 -10.2 -2.1 30.9 0-255 q4446.jpg m4446.jpg 01:15:18 4.000 14.6 -9.8 -1.7 45.1 0-255 q4450.jpg m4450.jpg exp: Exposure time in seconds (200 ISO, f/2.8). 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).