Obs 19 april 1999

Barhorst L.J.C. (L.J.C.Barhorst@arcadis.nl)
Tue, 20 Apr 1999 09:14:53 +0200

Just a few occasional small clouds made it an other splendid observation
night.

69-  9 A 99-04-19 21:12:34   LB   67.2 0.2  10  6.72  FF, 3->inv, sm, 6
81- 59 A 99-04-19 20:41:29   LB   96.5 0.2  40  2.41  'Ff'F, mag 3(5)->inv
Timings in seconds and (flashnumber): 9.96(4) 14.39(10) 23.97(20) 48.16(40)

84-123 A 99-04-19 20:53      LB                       S, mag 6
85- 75 A 99-04-19 19:42:03   LB   59.1 0.5   6  9.9   AA, mag 5->6, dtm
Timings: 13.61 21.17 14.94 9.39 Guesed 6 flashes

85- 79 B 99-04-19 21:36:55   LB  119.3 0.5  10 11.93  AA, mag 5->7
87- 20 B 99-04-19 21:17:06   LB   94.9 0.5   4 23.7   AA, mag 5->7
90- 29 J 99-04-19 21:05      LB                       slowly var, mag 4->7
92-  8 B 99-04-19 21:08      LB                       S, mag 4
93- 61 A 99-04-19 20:14:53   LB  205.4 0.2  57  3.603 FF,1->inv,sm, 3, N?
Tried to time every flash. Some of the brighter flashes were double, only 
timed the first. Several flashes came too unexpected and were not timed. 
Timings of the observed flashes:
7.97 7.17 7.54 7.40 7.92 7.39 4.27 3.54 5.23 3.31
6.22 8.45 4.19 2.60 11.91 3.21 8.11 3.53 3.45 7.97
3.80 3.48 8.31 3.67 3.15 8.22 3.49 3.95 3.05 4.61
3.46 4.28 3.07 4.08 3.86 4.03 3.86 3.91 3.66 4.04
I'll run Bjoerns Synodic program this evening to determine a possible
better fitting number of flashes

94- 85 B 99-04-19 21:25:42   LB  122.2 0.5   6 20.4   AA, mag 4->7
98- 43 G 99-04-19 20:59:06   LB  141.8 0.5   4 35.4   AA, mag 3->7
98- 76 B 99-04-19 20:00:40   LB  210.1 0.2  50  4.201 FF, mag 3->inv
Timings every 10th flash: 42.02 42.16 41.93 42.58 41.38

99- 12 E 99-04-19 19:54:20   LB   75.0 0.2  40  1.88  FF, mag 3->inv
Timings every 10th flash: 18.73 18.60 18.81 18.90

99- 12 E 99-04-19 21:31:38   LB   99.2 0.2 100  0.992 FF, mag 3->inv, hp
Timings: 47.78(50) 18.56(70) 10.27(80) 22.56(100)
This gives the following periods for each interval: 0.956 0.928 1.027 1.128

99- 20 A 99-04-19 20:36      LB                       slowly var, mag 4->7
99- 20 B 99-04-19 20:27      LB                       almost S, mag 6
Using the TLE's Tristan posted yesterday I saw both objects.
However 99- 20 A was on time and varied due to change of phase angle,
but 99- 20 B was about 4 minutes late.

Sateliite watching is a fasenating hobby.
Greetings and clear, dark skies
Leo Barhorst
52.77 N   5.09 E   2 m ASl