next up previous contents
Next: Neil CliffordBirmingham, Up: Observational Flashes Previous: Observational Flashes

Mike McCants, Austin, Texas, USA

I observed 89- 28 B on April 14 with a period of 31.4, magnitude between 5.5 and invisible. One bright flash to 4th mag at a sec max time. On the same day, I accidentally spotted 63- 47 D while watching a classified object. At max most of the time with a brief dim to inv every 0.98 seconds.

84-109 B had a period of 10.7 on April 8th. It would seem that this one is going up again. On the same day, I measured a period of 6.51 s for 93- 26 B. The flash pattern was F'fff. Three faint (mag 8) secondary maxima in between the bright flashes. The spacing for this pattern seemed regular at 1.6 seconds. Later that day I saw 89- 28 B with a period 31.5 seconds and some secondary maxima. Something has definitely happened to this object. There were some faint secondary maxima, but one was a flash to magnitude 5 at a range of 1800Km.

On April 21 I saw 91- 29 B with a period of 30 seconds. I really think this is 30, not 60, (since the secondary max were at 15 seconds), and that this is the same as last October and shorter than the 36 of last January.

On April 26, 95- 18 B was pretty spectacular. It was flashing with a period of 2 seconds. Flashes seen with unaided eye (magnitude 3). Some secondary flashes only about 1/4 second apart. I had seen it flashing with a period of 2 seconds on April 21. There were "extra" flashes on top of the normal tumble cycle. It seemed to me to be a rather broad maximum (for a two second period) with a deep minimum. On top of the broad maximum, there were flashes that were about 1 magnitude brighter. These seemed to be about 1/2 second apart. In general, there were frequently 3 flashes during each maximum. When I watched it on April 20 from my light-polluted skies with 7x50 binoculars, I could only see these flashes, not the underlying maximum. So I would have also called it a "triple maximum". Of course with a rather low orbit and an inclination of (minus) 36.6 degrees, it won't be easy to see from Europe.

87- 51 J was steady on 26th of April. Yes, it would certainly seem this was a false alarm.

I measured a 41.3 s period for 93- 55 C on April 21th. I saw this one with period 100 seconds in January, so it is going down!?



next up previous contents
Next: Neil CliffordBirmingham, Up: Observational Flashes Previous: Observational Flashes



bdp@mpe.mpe-garching.mpg.de