Flash Periods of 96-38B
Rainer Kracht (R.Kracht@t-online.de)
Sun, 14 Jul 96 17:11 +0100
Flash Periods of 96-38B
I observed 96-38B again on July 13 at 21:24 UTC with FP = 1.381 +/- 0.007 sec.
Observations so far in PPAS format:
96- 38 B 96-07-04 02:18 OO 10
96- 38 B 96-07-04 21:57 PN 1.5
96- 38 B 96-07-04 21:59:00 RK 67.3 0.3 49 1.37 half period
96- 38 B 96-07-04 22:03 IL 4 +/- 1
96- 38 B 96-07-05 07:07 TM 3
96- 38 B 96-07-05 20:35:30 IL 3
96- 38 B 96-07-06 20:42:29 IL 2.75 +/- 0.25
96- 38 B 96-07-06 22:10 PN 2.17 +/- 0.3
96- 38 B 96-07-06 22:12 TC 4.4 full period
96- 38 B 96-07-07 22:19 LB 76.6 40 1.91
96- 38 B 96-07-08 20:56 IL 1
96- 38 B 96-07-08 22:25:39 HS 2.5
96- 38 B 96-07-09 05:56 WC 14.8 10 1.48
96- 38 B 96-07-09 21:02 IL 1
96- 38 B 96-07-11 21:11:58 RK 36.7 0.1 25 1.47 mag 0 to inv
96- 38 B 96-07-13 21:24:23 RK 41.4 0.2 30 1.38
HS Hermann Schnitzler
IL Igor Lissov
LB Leo Barhorst
OO Ohio observer
RK Rainer Kracht
TC Tristan Cools
TM Ted Molczan
WC Western Canada observer
Using only FP's with tenths of seconds I get:
96- 38 B 96-07-04 21:57 PN 1.5
96- 38 B 96-07-04 21:59:00 RK 67.3 0.3 49 1.37 half period
96- 38 B 96-07-06 20:42:29 IL 2.75 +/- 0.25
96- 38 B 96-07-06 22:10 PN 2.17 +/- 0.3
96- 38 B 96-07-06 22:12 TC 4.4 full period
96- 38 B 96-07-07 22:19 LB 76.6 40 1.91
96- 38 B 96-07-08 22:25:39 HS 2.5
96- 38 B 96-07-09 05:56 WC 14.8 10 1.48
96- 38 B 96-07-11 21:11:58 RK 36.7 0.1 25 1.47 mag 0 to inv
96- 38 B 96-07-13 21:24:23 RK 41.4 0.2 30 1.38
At least three flash periods are visible:
2.75 seconds on July 04/06/13
4.4 seconds on July 06
2.95? seconds on July 9/11 (if 1.48/1.47 is half period)
This flash behaviour reminds me of Halley's comet with its combination
of a 7.1 day rotation and a 3.7 day precession period. Perhaps the
spin axis of 96-38B is rapidly precessing.
Rainer Kracht 1996 July 14
R.Kracht@t-online.de
+9.6626E, +53.7695N, 9m