NLC 2009-06-18/19
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: 2009-06-18/19
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
----- ----- ------ ------- ---- ---- --------------------------------
21:40 X cloud to h 5
21:45 X cloud to h 5
21:50 X no image
21:55 X no image
22:00 X cloud
22:05 X cloud
22:10 NLC 1 25 15 340 >350 cloud to h 5 and on right
22:15 II 2 25 15 330 360 cloud to h 5
22:20 II 2 30 15 325 360 cloud to h 5
22:25 II 2 30 15 325 360 cloud to h 5, to h 15 on left
22:30 II 2 30 15 325 360 cloud to h 10, patches to h 15
22:35 II 2 30 15 325 360 cloud to h 15
22:40 II 2 40 <325 360 cloud to h 15
22:45 II 2 patchy cloud
22:50 II 2 patchy cloud
22:55 II 2 patchy cloud
23:00 II 2 patchy cloud
23:05 II 2 30 5 <325 5 cloud to h 5, patches higher
23:10 I,II 2 30 5 <325 15 cloud to h 10
23:15 II 2 20 5 <325 20 cloud to h 5
23:20 II,III 2 20 5 <325 20 cloud to h 5
23:25 II,III 2 20 5 <325 20 cloud to h 5
23:30 II,III 3 20 <5 <325 25 cloud to h 5
23:35 II,III 2 15 <5 <325 25 cloud to h 5
23:40 II,III 3 15 <5 <325 30 cloud to h 5
23:45 II,III 3 15 <5 <325 30 cloud to h 5
23:50 II 4 10 <5 <325 30 cloud to h 5
23:55 II 4 10 <5 <325 30 cloud to h 5
00:00 IV 4 cloud to h 5
00:05 IV patchy cloud to h 15
00:10 IV 4 patchy cloud to h 15
00:15 IV 4 10 <325 >30 patchy cloud to h 10
00:20 IV 4 10 <325 >30 patchy cloud to h 10
00:25 IV 4 10 <325 >30 patchy cloud to h 10
00:30 II,IV 4 15 <325 >30 patchy cloud to h 10
00:35 II,IV 4 15 <325 >30 patchy cloud to h 10
00:40 II,IV 4 15 <325 >35 patchy cloud to h 10
00:45 II,IV 4 15 <325 >35 patchy cloud to h 10
00:50 II,IV 4 15 <325 >35 patchy cloud to h 10
00:55 II,IV 4 15 <325 >35 patchy cloud to h 15
01:00 NLC 4 patchy cloud
01:05 NLC patchy cloud
01:10 NLC patchy cloud
01:15 NLC 4 patchy cloud
01:20 NLC patchy cloud
01:25 NLC patchy cloud
01:30 NLC patchy cloud
01:35 NLC patchy cloud
01:40 NLC patchy cloud
01:45 NLC patchy cloud
01:50 X cloud
01:55 X cloud
02:00 X cloud
02:05 NLC? patchy 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: 2009/06/18-19
Start: 22:10
End: 01:45
Forms: I, II, III, IV
Max elevation: 40
Max brightness: 4
Comments:
<a href="http://www.chiandh.me.uk/p/NLC_2009-06-18/19>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. For some images a second version is available, where an aggressive unsharp mask has been applied to reveal faint detail.
UT exp A hSun h15 h85 stretch image (masked) ----- ------ ----- ----- ----- ----- ----- --------------------- 22:10 0.400 331.6 -6.4 1.5 166.2 0-255 q2719.jpg m2719.jpg 22:15 0.600 332.7 -6.7 1.0 164.0 0-255 q2720.jpg m2720.jpg 22:20 0.800 333.8 -7.0 0.6 161.3 0-255 q2721.jpg m2721.jpg 22:25 1.000 334.9 -7.3 0.3 158.0 0-255 q2722.jpg 22:30 1.300 336.1 -7.6 0.0 153.8 0-255 q2723.jpg 22:35 1.300 337.2 -7.9 -0.3 148.3 0-200 q2724.jpg 22:40 2.000 338.3 -8.2 -0.5 140.9 0-200 q2725.jpg 22:45 2.500 339.4 -8.4 -0.7 131.1 0-255 q2726.jpg 22:50 2.500 340.6 -8.7 -0.9 118.1 0-255 q2727.jpg 22:55 3.200 341.7 -8.9 -1.1 102.1 0-255 q2728.jpg 23:00 4.000 342.8 -9.1 -1.3 85.2 0-255 q2730.jpg 23:05 5.000 344.0 -9.3 -1.4 70.0 0-255 q2732.jpg 23:10 6.000 345.1 -9.5 -1.6 57.9 0-255 q2735.jpg m2735.jpg 23:15 6.000 346.3 -9.7 -1.7 48.9 0-255 q2738.jpg 23:20 8.000 347.4 -9.8 -1.8 42.3 0-255 q2741.jpg 23:25 8.000 348.6 -10.0 -1.9 37.4 0-255 q2744.jpg 23:30 8.000 349.8 -10.1 -2.0 33.7 0-255 q2748.jpg 23:35 8.000 350.9 -10.2 -2.1 30.9 0-255 q2752.jpg 23:40 8.000 352.1 -10.3 -2.1 28.7 0-255 q2756.jpg 23:45 8.000 353.2 -10.4 -2.2 27.1 0-255 q2760.jpg 23:50 4.000 354.4 -10.5 -2.2 25.8 0-200 q2765.jpg 23:55 4.000 355.6 -10.6 -2.3 24.8 0-200 q2769.jpg 00:00 8.000 356.7 -10.6 -2.3 24.1 0-255 q2772.jpg 00:05 8.000 357.9 -10.6 -2.3 23.6 0-255 q2776.jpg 00:10 4.000 359.1 -10.7 -2.3 23.4 0-255 q2781.jpg 00:15 4.000 0.2 -10.7 -2.4 23.3 0-255 q2785.jpg 00:20 4.000 1.4 -10.6 -2.3 23.5 0-255 q2789.jpg 00:25 4.000 2.6 -10.6 -2.3 23.8 0-255 q2793.jpg 00:30 4.000 3.7 -10.6 -2.3 24.4 0-255 q2797.jpg 00:35 4.000 4.9 -10.5 -2.3 25.2 0-255 q2801.jpg 00:40 4.000 6.1 -10.5 -2.2 26.2 0-255 q2805.jpg 00:45 4.000 7.2 -10.4 -2.2 27.7 0-255 q2809.jpg 00:50 4.000 8.4 -10.3 -2.1 29.6 0-255 q2813.jpg 00:55 4.000 9.5 -10.2 -2.0 32.0 0-255 q2817.jpg 01:00 4.000 10.7 -10.1 -1.9 35.1 0-255 q2820.jpg 01:05 4.000 11.9 -9.9 -1.9 39.2 0-255 q2823.jpg 01:10 4.000 13.0 -9.8 -1.7 44.8 0-255 q2826.jpg 01:15 4.000 14.2 -9.6 -1.6 52.2 0-255 q2829.jpg 01:20 4.000 15.3 -9.4 -1.5 62.4 0-255 q2832.jpg 01:25 2.000 16.5 -9.2 -1.4 75.8 0-200 q2836.jpg 01:30 2.000 17.6 -9.0 -1.2 91.9 0-200 q2838.jpg 01:35 2.000 18.7 -8.8 -1.0 108.8 0-255 q2840.jpg 01:40 2.500 19.9 -8.6 -0.8 123.7 0-255 q2841.jpg 01:45 2.000 21.0 -8.3 -0.6 135.4 0-255 q2842.jpg 02:05 0.800 25.5 -7.2 0.4 159.4 0-255 q2846.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).
