Optical 04 Jan 2018

From: Greg Roberts via Seesat-l <seesat-l_at_satobs.org>
Date: Sat, 6 Jan 2018 10:52:17 +0200
Observations 04 January 2018
---------------------------------------------
Cosatrak 1 (Computerised satellite Tracking System).

Canon 650D DSLR camera - using the telephoto lens
supplied (75 to 300mm focal length) and set on about
200mm focal length. Field of view 6.05 x 4.40 degrees
with image scale 16.7 arc sec/pixel. Images at ISO 3200.

All Images processed and automatically reduced using APEX
(except first one for #32476 done with ASTROJ).


FOR CLASSIFIED.TLE:
------------------------------------
26907 01 040C   0435 P 20180105193717450 16 15 0417166+292257 18
26907 01 040C   0435 P 20180105193727840 16 15 0420476+281849 58
26907 01 040C   0435 P 20180105193738090 16 15 0424188+271354 18
26907 01 040C   0435 P 20180105193758720 16 15 0431378+245622 18
26907 01 040C   0435 P 20180105193808860 16 15 0435203+234520 18
26907 01 040C   0435 P 20180105193818980 16 15 0439103+223113 28
26907 01 040C   0435 P 20180105193839570 16 15 0447027+195659 28
26907 01 040C   0435 P 20180105193849690 16 15 0451142+183342 28
26907 01 040C   0435 P 20180105193920500 16 15 0503599+141634 18
26907 01 040C   0435 P 20180105193930870 16 15 0508329+124335 18
26907 01 040C   0435 P 20180105194102920 16 15 0554118-023912 18
26907 01 040C   0435 P 20180105194113050 16 15 0559423-042537 18
32476 08 002A   0435 P 20180105191150700 16 15 0745031-103228 18
32476 08 002A   0435 P 20180105191152200 16 15 0744284-104834 19
33490 09 001A   0435 P 20180105192152820 16 15 0532261+094001 19

STRAYS SEEN:
---------------
04579 70 083B   0435 P 20180105192621480 16 15 0406035+270652 28

NOTES:
-----------
(1) Poor conditions - eventually clouded out completely

(2) Experimenting again. Due to my very bright sky I have to use
     some aperture to see the fainter objects which means the system
     is not ideal for looking for objects that are lost, so now trying
     to produce a set-up which will give me a reasonable field and
     reaching as faint as magnitude +6 which would normally be enough
     for objects like USA 186 and OTV-5. The set-up used now is "so-so"
     but I think I can get better.

(3) The first observation of TECSAR - #32476 - is not so accurate as
     I only got part of the trail in the 3 second exposure and is given
     to indicate that the object is TECSAR from the track angle. The
     second point is accurate and done in ASTROJ.

(4) The current situation is not much good for geosats as only MENTOR 4
     seen and no sign of nearby Thuraya 2. It would appear the limiting
     magnitude is around +10.8 for geosats and about mag +5 or so for
     leosats in non-tracking mode.

Cheers
Greg

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Received on Sat Jan 06 2018 - 02:53:41 UTC

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