Re: DMSP B5D2-7 Flash

Ed Cannon (
Wed, 09 Jul 1997 19:20:16 -0400

Don Gardner <fn470@cleveland.Freenet.Edu> wrote:

>Last evening at 21:43:30 (01:43:30 8-July UTC) DMSP B5D2-7 (NORAD 23233;
>94057A) went from its usual 4.0 mag to about a 0 mag for about 5 seconds.
>Has anyone else had a similar observation on any of the DMSP sats?

On 8 July around 5:22-23 UTC this object was observed one-power (i.e.,
without magnification) at about mag. 2 to 3 when predicted mag. was 4.7.
(I think it flashed, but if so I failed to write that down.)  Generally 
from the Austin BCRC location -- 30.315N, 97.866W, 280m -- satellites 
fainter than about 4 -- or maybe somewhat brighter -- almost always 
require magnification, even on good nights.

Ed Cannon
Austin, Texas, USA
30.3086N, 97.7279N, 165m