Obs 970507/08

Leo Barhorst (leobarhorst@pi.net)
Thu, 08 May 1997 13:05:32 +0200

After days with clouds it finally cleared up this evening. With cold northern winds 
clear air blow in and it was cristall clear. As I have a few days from work I could 
stay up all night and made 45 obs; although I've seen more sats and several nice 
meteors.
Towards the morning the sky became less transparent and when I woke up this morning
(late !) it was all clouded again.
So I've been lucky this night with the weather.

As Kurt Jonckheere pointed out to me I made a mistake when entering an obs on 97-04-22: 
93- 23 A should have been 92- 23 A. Thanks Kurt.

The observations with comments:

65- 65 C 97-05-07 21:22:24   LB   30.1 0.5  10  3.01  AA, mag 5->inv
Nice flasher, be carefull to count the same bright flash!; lots of other 
(secondary) flashes. 

65-109 F 97-05-07 21:56:57   LB  108.4 0.2  11  9.86  Ff, 4(6)->inv, dtm
Difficult to measure; I timed the following: 41.85 (4), 5.08+13.80 (2)
4.47+5.21 (1), 4.41+5.36 (1), 3.10+5.93 (1) 9.60 (1) 9.61 (1)
In between the () the number of periods based on the last two measurements that 
were not so difficult to make. The second of the dubble timings was the faint secondary 
flash.

71- 24 A 97-05-07 23:33:55   LB   53.7 0.5   4 13.4   AA, mag 5->inv
71- 87 A 97-05-08 00:13      LB                       slowly var, mag 4->7
Period could not be determinated

71-116 B 97-05-08 00:41:30   LB   89.2 0.2  10  8.92  FF, mag 5->inv
This Intelsatrocket is flashing nicely. Was at a height of 4350 km. Nice, sharp 
flashes. Is catalogued as 67- 01 X by Norad with number 06779.

76- 22 A 97-05-08 00:49:28   LB  140.4 0.5   2 70.2   AA, 5->inv, 1 fl to mag 3
Entered 2 periods, but inconclusive: 4 flashes were timed:
45.51+23.59=69.08 and 61.66+9.67=71.34 

78- 18 B 97-05-07 23:33:55   LB   71.7 0.2  23  3.12  FF, mag 3(6)->inv
Going up slowly again

78-109 J 97-05-07 22:14      LB                       S, mag 7
81- 84 B 97-05-07 22:50:45   LB   84.1 1.0   2 42.1   MM, mag 5->inv
84-  3 B 97-05-07 22:58      LB                       S, mag 5
85- 94 G 97-05-08 01:27:48   LB  120.4 0.5   6 20.1   AA, mag 4->6
86- 61 A 97-05-07 21:39:08   LB   35.3 0.2  20  1.76  'FFFF-'F, mag 5->inv
In the west the flashes were sometimes not visible, no obs made; in the south the
flashpattern was obvious and timing on the 'missing' flash was easy.

86-100 B 97-05-08 02:31      LB                       almost S, mag 4
87- 11 A 97-05-08 02:01:09   LB   49.1 0.2  10  4.91  AA, mag 4->inv
To be watched, period is fluctuating.

87- 18 A 97-05-07 21:18:04   LB   57.2 0.2   6  9.54  FF, mag 4->inv, sm, mag 5
Strange behavior the last month; to be watched closely

87-106 B 97-05-07 22:55:57   LB  141.4 0.5   4 35.3   AA, mag 4->inv
88- 20 A 97-05-08 02:15:45   LB  115.0 0.2   6 19.17  AA, mag 3->inv, sm, mag 2
In between max. some bright flashes

89- 17 B 97-05-07 21:44:44   LB  106.2 0.5   4 26.6   AA, mag 5->inv, sm, mag 6
Secondary max. not evenly spaced between the primary max.

90- 10 A 97-05-07 21:00      LB                       S, mag 5
90- 13 A 97-05-07 20:39      LB                       var, mag 6->inv
90- 81 B 97-05-08 02:27      LB                       1 flash, mag 3->inv
Just 1 flash seen, long period.

90-105 A 97-05-07 20:35      LB                       almost S, mag 6
91-  9 J 97-05-08 00:23      LB                       almost S, mag 5
This once nice flasher has become almost S

91- 41 B 97-05-07 21:10:04   LB   94.8 0.5   1 94.8   AA, mag 5->7
91- 59 B 97-05-07 23:50:48   LB   76.4 0.5   2 38.2   AA, mag 5->inv
92-  8 B 97-05-07 21:14:42   LB   47.5 0.2  10  4.75  FF, mag 4->inv
Still going up nicely; easy object

92- 12 B 97-05-08 01:04      LB                       S, mag 5
92- 20 B 97-05-07 23:08:42   LB  154.0 0.5   4 38.5   AA, mag 4->inv
92- 23 A 97-05-07 23:53:39   LB   37.7 0.5   6  6.3   AA, mag 3->5
92- 23 A 97-05-08 01:33:50   LB   35.8 0.2  30  1.19  FF, mag 3->5
The first, low north-easterly, pass was hard to observe; the next was high in the 
southwest and easy.

92- 30 J 97-05-07 22:30:05   LB   76.8 0.2   4 19.2   FF, mag 4->inv
92- 30 J 97-05-08 02:35:12   LB   75.9 0.2   4 19.0   FF, mag 4->inv
First pass at 20:23 not seen; second pass was late wrt prediction; third pass
almost on time but hard to observe at dawn, although flashes were easily seen

93-  1 B 97-05-07 22:26:30   LB   54.4 0.5   1 54.4   AA, mag 3->inv
93-  1 B 97-05-08 00:09:26   LB  115.2 0.5   2 57.6   AA, mag 2->5
Bright max. but long period, possible synodic effects

93- 59 B 97-05-08 01:15      LB                       S, mag 3
94- 85 B 97-05-08 01:08:57   LB   54.3 0.5  10  5.43  AA, mag 5->6
95- 32 B 97-05-07 23:16      LB                       S, mag 5
This formely nice flasher has become S

96-  4 B 97-05-07 21:36:40   LB   56.7 0.5   2 28.4   AA, mag 4->6
Still going up

96- 17 B 97-05-07 20:42:49   LB   40.5 0.5   1 40.5   AA, mag 7->inv
96- 17 B 97-05-07 22:20      LB                       S, mag 6
The first obs was low from east to the north-east, good flash; the second obs was
almost zenithal and no change of brightness observed

96- 29 C 97-05-07 20:53      LB                       S, mag 8, with D+E
Difficult to see on this low pass in the north with a phase-angle of nearly zero!

96- 52 C 97-05-07 21:31:43   LB   43.1 0.5   6  7.2   AA, mag 4->inv
97-  6 D 97-05-07 21:24      LB                       S, mag 6
Easy to observe; other objects of this launch are more difficult

97- 10 B 97-05-07 23:47:33   LB   66.5 0.5   4 16.6   AA, mag 4->7
Start-1 5th stage of the Zeya launch. Didn't see the the A, C and D objects at their 
predicted times.

97- 17 B 97-05-07 23:13:18   LB  157.9 0.5  10 15.79  AA, mag 3->inv
This rocket is a nice flasher

As I finish this report it has already started raining!

-- 
Greetings and clear skies

Leo Barhorst		Alkmaar			The Netherlands
52.65 North		4.767 East		1 m ASL
Member of Seesat-L
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Every day I wonder about the things I see in the (night)sky