This evening (23 Jan), I saw USA 144 on a zenithal passage from the zenit till it entered shadow around 20h21m46s. In contrast with last Monday when I saw it steady it was now slowly varying with a long period between +5 and +8 at minimum. I measured a period of about 330 / 3 = 110 +- 10 seconds. regards, Kurt ----- Original Message ----- From: Ted Molczan <molczan@rogers.com> To: SeeSat-L <SeeSat-L@satobs.org> Sent: Monday, January 20, 2003 3:13 PM Subject: RE: USA 144 elements; photometric timings needed > Kurt Jonckheere wrote: > > > As Ted didn't mention any brightness here, I was surprised to > > see an object with magnitude around +6 in my field. I could > > follow it from around 19h45m UT till it entered shadow around > > 19h47m47s. During this two and a half minute I did not > > notice any obvious magnitude changes, certainly no deep > > minimum was seen. > > Kurt's obs was made when the phase angle was near zero. Last summer, > I noticed that variations were much more subtle when phase angle > was near zero: > > http://satobs.org/seesat/Jul-2002/0201.html > > http://satobs.org/seesat/Aug-2002/0110.html > > http://satobs.org/seesat/Aug-2002/0246.html > > Could this be an indication that the axis of rotation approximately > points toward the sun? > > Ted Molczan > > > ----------------------------------------------------------------- > Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' > in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org > http://www.satellite.eu.org/seesat/seesatindex.html > ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www.satellite.eu.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Thu Jan 23 2003 - 15:55:46 EST