Optical 29 August 2014

From: Greg Roberts via Seesat-l <seesat-l_at_satobs.org>
Date: Sat, 30 Aug 2014 16:32:29 +0200
Observations 29 August 2014
-------------------------------------

Cosatrak 1 (Computerised satellite Tracking System).

FLI ML8300M CCD camera with mechanical shutter + Trimble GPS

Used with 8 inch f/3.67 reflector.
Field of view 82 x 62 arc minutes.
Image scale 4.46 arc sec/pixel.
Most images processed and measured manually.

Site 0433 : Longitude 18.51294 deg East, Latitude -33.94058 deg,
Elevation 10 metres-situated in Pinelands (Cape Town),South Africa

FOR CLASSIFIED.TLE:
------------------------------
05204 71 039A   0433 F 20140829204718628 16 15 2336569+103728 28  +125 05
05204 71 039A   0433 F 20140829204718628 16 15 2336584+103738 97  +129 00
05204 71 039A   0433 F 20140829205050753 16 15 2340228+104525 28  +125 05
05204 71 039A   0433 F 20140829205149078 16 15 2341188+104714 28  +125 05
05204 71 039A   0433 F 20140829205234826 16 15 2342033+104855 28  +125 05
05204 71 039A   0433 F 20140829205455341 16 15 2344205+105344 28  +125 05
10016 77 038A   0433 F 20140829205821734 16 15 2338219+040519 28  +150 05
10016 77 038A   0433 F 20140829205909586 16 15 2339222+040833 28  +145 05
10016 77 038A   0433 F 20140829205956253 16 15 2340214+041154 28  +150 05
11397 79 053A   0433 F 20140829211029407 16 15 0011126+094314 28  +135 05
11397 79 053A   0433 F 20140829211135752 16 15 0012171+094735 28  +135 05
11397 79 053A   0433 F 20140829211223405 16 15 0013029+095043 28  +135 05
11436 79 053C   0433 F 20140829211726350 16 15 0051534+121106 19  +128 06
11436 79 053C   0433 F 20140829211816720 16 15 0052420+121351 67  +133 00
11436 79 053C   0433 F 20140829211859854 16 15 0053236+121625 18  +128 00
11436 79 053C   0433 F 20140829211933700 16 15 0053554+121836 28  +140 05
11940 73 040B   0433 F 20140829212320503 16 15 2340568+115358 28  +130 05
11940 73 040B   0433 F 20140829212417847 16 15 2341537+115627 47  +133 00
11940 73 040B   0433 F 20140829212451664 16 15 2342273+115751 28  +131 02
11940 73 040B   0433 F 20140829212523494 16 15 2342584+115908 18  +129 01
14677 84 009C   0433 F 20140829210212002 16 15 2359289+053352 28  +125 05
14677 84 009C   0433 F 20140829210342657 16 15 0001180+053751 28  +125 05
14677 84 009C   0433 F 20140829210523068 16 15 0003189+054242 28  +125 05
14677 84 009C   0433 F 20140829210607848 16 15 0004121+054459 28  +125 05
16117 85 092C   0433 F 20140829212751182 16 15 0021218-015734 28  +145 05
16117 85 092C   0433 F 20140829212939485 16 15 0023077-015101 28  +150 05
16117 85 092C   0433 F 20140829213138237 16 15 0025018-014346 28  +145 05
16117 85 092C   0433 F 20140829213214600 16 15 0025383-014128 19  +129 06
23223 94 054A   0433 F 20140829171631049 16 15 1912574-035929 47  +106 00
23223 94 054A   0433 F 20140829171823244 16 15 1914502-040209 47  +106 01
23223 95 054A   0433 F 20140829171905283 16 15 1915324-040307 57  +106 01
27785 68 063B   0433 F 20140829203714269 16 15 2017532-011954 78  +132 05
27785 68 063B   0433 F 20140829203942271 16 15 2019524-011207 18  +134 01
28158 04 004A   0433 F 20140829213824372 16 15 0055357+002512 47  +114 01
28158 04 004A   0433 F 20140829214013093 16 15 0057245+002716 28  +118 05
28158 04 004A   0433 F 20140829214046940 16 15 0057584+002751 28  +120 05
32287 07 054A   0433 F 20140829203218396 16 15 2026443+035438 28  +120 05
32287 07 054A   0433 F 20140829203331757 16 15 2027573+035405 27  +123 01
32287 07 054A   0433 F 20140829203421473 16 15 2028471+035349 27  +122 01
33490 09 001A   0433 F 20140829170855804 16 15 1849148+010930 77  +092 06
33490 09 001A   0433 F 20140829170922392 16 15 1849414+010921 57  +097 74
33490 09 001A   0433 F 20140829171109573 16 15 1851291+010849 18  +097 02
38529 12 034B   0433 F 20140829214514646 16 15 2141509+062235 87  +104 02
38529 12 034B   0433 F 20140829214755938 16 15 2144310+062412 97  +108 02
38529 12 034B   0433 F 20140829215113783 16 15 2147474+062611 87  +105 02
38529 12 034B   0433 F 20140829215233125 16 15 2149061+062659 77  +106 01
38529 12 034B   0433 F 20140829215315376 16 15 2149481+062725 28  +105 02
38529 12 034B   0433 F 20140829215423639 16 15 2150558+062804 18  +098 00
39120 13 011A   0433 F 20140829203218396 16 15 2027187+040517 28  +115 05
39120 13 011A   0433 F 20140829203331757 16 15 2028316+040714 37  +123 01
39120 13 011A   0433 F 20140829203421473 16 15 2029212+040828 77  +121 01
39120 13 011A   0433 F 20140829215233125 16 15 2147240+060228 37  +110 01
39120 13 011A   0433 F 20140829215315376 16 15 2148061+060339 38  +112 02
39120 13 011A   0433 F 20140829215423639 16 15 2149143+060517 28  +112 02

STRAYS SEEN:
-------------
07229 74 017A   0433 F 20140829204718628 16 15 2334299+104722 97  +145 00
10365 77 092A   0433 F 20140829204718628 16 15 2335532+101400 19  +115 06
15147 84 079A   0433 F 20140829211816720 16 15 0053263+120734 77  +134 02
15147 84 079A   0433 F 20140829211859854 16 15 0053330+121225 18  +139 00
18387 87 084D   0433 F 20140829173223802 16 15 1834224-112415 18  +135 01
18387 87 084D   0433 F 20140829173402367 16 15 1836043-112409 28  +133 03
21140 91 015B   0433 F 20140829212751182 16 15 0022193-021441 28  +120 05
21140 91 015B   0433 F 20140829213214600 16 15 0026327-015830 29  +120 13
21222 91 026A   0433 F 20140829171631049 16 15 1914376-040022 47  +142 00
21222 91 026A   0433 F 20140829171823244 16 15 1916297-040311 37  +135 01
21222 91 026A   0433 F 20140829171823244 16 15 1916307-040257 38  +118 05
21222 91 026A   0433 F 20140829171905283 16 15 1917114-040419 18  +144 03
23615 95 035D   0433 F 20140829212939485 16 15 0025233-023507 28  +140 05
24732 97 007A   0433 F 20140829213824372 16 15 0056267+002217 47  +121 01
24732 97 007A   0433 F 20140829214013093 16 15 0058148+002357 28  +120 05
25515 98 063A   0433 F 20140829203218396 16 15 2028521+035531 28  +115 05
25515 98 063A   0433 F 20140829203331757 16 15 2030044+035517 27  +117 01
25515 98 063A   0433 F 20140829203421473 16 15 2030543+035503 28  +113 01
27825 03 026A   0433 F 20140829170855804 16 15 1849390+010448 77  +107 06
27825 03 026A   0433 F 20140829170922392 16 15 1850056+010439 57  +108 74
27825 03 026A   0433 F 20140829171109573 16 15 1851532+010407 47  +104 02

NOTES:
--------
(1) Prime purpose was to try and locate unknown seen 24th August. The
    inclination is well defined but a small spread in mean motion. A
    search was carried out for 2 hours and 230 images taken - these have
    stil to be examined but first impression is that it was not seen :-((

(2) Spent some time afterwards looking for high altitude classifieds not
    seen for some time - acquired all of them.

(3) When attempting to use APEX to process images acquired in (2) had a
    very low success rate which had me puzzled for a while as Im more
    used to about a 10% failure rate. However when measuring the images
    manually  the problem became obvious. The area of sky observed
    (around RA 0 - 2 hrs, dec +10 approx) has a low star density. My
    APEX is currently set up to use only the TYCHO 2 star catalog its
    reference star database - ie only to mag +12. With the narrow field
    of view there were simply not enough stars mag = +12 or brighter
    for APEX to perform a plate solution (which it needs to do before
    it will produce a position and magnitude as it likes around 10
    refence stars before performing a  solution. The remedy is obvious
    - install a deeper star database down to mag +16 which is what
    the current images are having no problem displaying. I think the
    paucity of stars for a plate solution sometimes forces APEX to use
    whatever bright stars it can find which sometimes means working
    well off center of field of view, so consequently astimatism,
    field curvature,non linear field scale,  coma etc sometimes results
    in x and y image scales being a little different - they should
    ideally be the same as the CCD camera pixels are square. If plenty
    of stars they are virtually the same.

Cheers - now to go through the images in (1).
Greg
 

_______________________________________________
Seesat-l mailing list
http://mailman.satobs.org/mailman/listinfo/seesat-l
Received on Sat Aug 30 2014 - 09:32:47 UTC

This archive was generated by hypermail 2.2.0 : Sat Aug 30 2014 - 14:32:49 UTC