On Sun, 12 Sep 2004 08:47:52 -0400 "Ted Molczan" <molczan@rogers.com> wrote: ... stuff deleted ... > > 98067AD was closest in time and observed elevation. > > Both are small pieces of debris from the recent ISS EVA. Kevin Fetter has > observed several of them, and found 98067AD to be the brightest. > Examining his video of it: > > http://satobs.org/seesat/Sep-2004/0059.html > > I estimate its standard magnitude at 9 (1000 km, 90 deg phase angle). > > Its predicted magnitude was about 7 at the time of your observation, > so for it to have been as bright as reported, it must have made a > specular reflection. > ... stuff deleted ... I observed 28412/98-067AD ("ISS debris AD") on two different passes between 2004 Sep 06 - 11 UTC and in all cases, it seemed steady at apparent magnitudes from 4.9 to 5.4. The corresponding "quicksat intrinsic magnitudes" averaged +6.3 +/- 0.1; using [Matson's] SkyMap program (which uses a Lambertian phase law), the corresponding "standard" magnitudes averaged +7.6 +/- 0.1. (The three observations were at astronomical phases ranging from 64 to 29 degrees; for what it's worth, no hint of flashing was seen during the brief passes observed.) The IOD form of the observations: 28412 98 067AD 0000 F 20040906091109000 18 S+049 02 28412 98 067AD 0000 F 20040911002321000 28 S+054 02 28412 98 067AD 0000 F 20040911002345000 28 S+052 02 ("0000" is a dummy station identifier, corresponding to the below coordinates.) Clear and dark skies! Ed Light Lakewood, NJ, USA N 40.1075, W 074.2312, +24 m (80 ft) ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Sun Sep 12 2004 - 10:48:51 EDT