Cosmos 2360 r = 25407

Walter Nissen (dk058@cleveland.Freenet.Edu)
Sat, 15 Aug 1998 10:12:39 -0400 (EDT)

You may recall my initial report for this object was: 
 
98- 45 B 98-07-30  4: 9:50.6 WN   22.7  .8   6    3.78 __', C* 2360 r, 
                       minima measured as much more precise than A or M maxima 
 
becuase the object was bright except for brief dips.  Since then, there 
has been an evolution of the light curve.  Also, using only the past 3 
nights, I've been able to see a loss of angular momentum from my own OBS 
alone. 
 
PPAS(beginning): 
Walter I. Nissen, Jr., CDP, dk058@cleveland.freenet.edu, 55 Barrett RD #808, 
Berea, OH 44017-1657, USA, 440-243-4980, -81d 51.823', 41d 22.413', 256m, 7x35 
98- 45 B 98-08-13  2:29:39.4 WN   47.8  .6  16    2.99 C* 2360 r, leading edges 
                     measured as much more precise than maxima or minima or 
                     trailing edges 
98- 45 B 98-08-14  2:12:19.7 WN  132.3  .4  44   3.006 C* 2360 r, leading edges 
                     measured, early flashes were short, F or A, and maxima 
                     could have been used, but final flashes were imprecise, A 
                     or M; trailing edges were not imprecise, i.e., gradual, as 
                     on 980813 
98- 45 B 98-08-15  1:57:23.5 WN  176.1  .4  58   3.036 C* 2360 r, leading edges 
                     measured but all flashes were quite short, F or A; for 
                     short times during the OBS, especially for the first 6 or 
                     so splits, it was obvious that every other flash was 
                     brighter, i.e., sm were measured, the initial pattern was 
                     f'F'; trailing edges were not imprecise, as on 980813; mag 
                     4?->inv 
 
The flash pattern has completely inverted from nearly all bright to nearly 
all dark.  I remember my first OBS of a mostly dark object.  I had a 
palpable feeling of "that's not fair, nor easy, being dark nearly all the 
time".  I don't feel bad about it anymore, at least when the period is 
short.  Ron Dantowitz, using computer tracking, can presumably obtain 
periods for long-period, mostly-dark objects which are beyond the reach of 
most telescopes. 
 
Cheers. 
 
Walter Nissen                   dk058@cleveland.freenet.edu
-81.8637, 41.3735, 256m elevation