CB Obs October 21, 2017; USA-279 manoeuvre observed!

From: C. Bassa via Seesat-l <seesat-l_at_satobs.org>
Date: Sun, 22 Oct 2017 01:58:59 +0200
The NROL52 payload, USA-279 [42949/17066A] was recovered after the
second perigee raising manoeuvre thanks in part to radio tracking by
Scott Tilley and myself, and elements from Mike McCants based on
knowledge from previous SDS transfer orbits. The observations below
cover the third perigee raising manoeuvre, which occurred around
22:07UT on October 21st. Unfortunately clouds were drifting by at that
point, so no evidence of the burn was seen...

The first 18 observations are before the manoeuvre, the remainder is
after. I need to analyse the brightness behaviour as it appeared the
flashes due to the rotation disappeared for about half an hour around
the time of the manoeuvre.

This plot shows the observations on the sky (azimuth vs altitude):
https://www.dropbox.com/s/1msiw3vaaybfxr3/20171021_usa279_boost.png

Approximate orbits fitted to the two segments yield the following
orbits. Note that these are approximate as they are fitted to small
arcs.

USA-279 pre-manoeuvre 3                                 16377x35798km
1 42949U 17066A   17292.89738262  .00000000  00000-0  00000-0 0    00
2 42949   8.0309 324.8271 2991000 181.4304 177.2789  1.48414800    03
# 20171021.87-20171021.92, 18 measurements, 0.013 deg rms
USA-279 post-manoeuvre 4                                28738x35941km
1 42949U 17066A   17294.91827497  .00000000  00000-0  00000-0 0    05
2 42949   5.8797 324.6336 0930162 179.4995 180.4671  1.13959372    09
# 20171021.94-20171021.97, 120 measurements, 0.002 deg rms

42949 17 066A   4171 G 20171021205926323 27 25 2030157-092728 17 R
42949 17 066A   4171 G 20171021205943257 27 25 2030391-092680 17 R
42949 17 066A   4171 G 20171021210000278 27 25 2030645-092626 17 R
42949 17 066A   4171 G 20171021210358310 27 25 2033993-091823 17 R
42949 17 066A   4171 G 20171021210756256 27 25 2037352-090995 17 R
42949 17 066A   4171 G 20171021210955315 27 25 2039026-090588 17 R
42949 17 066A   4171 G 20171021211012336 27 25 2039263-090531 17 R
42949 17 066A   4171 G 20171021211211308 27 25 2040935-090134 17 R
42949 17 066A   4171 G 20171021211228329 27 25 2041175-090083 17 R
42949 17 066A   4171 G 20171021211410281 27 25 2042598-085707 17 R
42949 17 066A   4171 G 20171021211552320 27 25 2044015-085360 17 R
42949 17 066A   4171 G 20171021211609254 27 25 2044254-085337 17 R
42949 17 066A   4171 G 20171021215154307 27 25 2113948-074261 17 R
42949 17 066A   4171 G 20171021215211328 27 25 2114205-074252 17 R
42949 17 066A   4171 G 20171021215228262 27 25 2114447-074185 17 R
42949 17 066A   4171 G 20171021215609273 27 25 2117555-073510 17 R
42949 17 066A   4171 G 20171021215626294 27 25 2117799-073469 17 R
42949 17 066A   4171 G 20171021220007305 27 25 2120960-072778 17 R
42949 17 066A   4171 G 20171021222753270 27 25 2146039-064249 17 R
42949 17 066A   4171 G 20171021222810291 27 25 2146331-064230 17 R
42949 17 066A   4171 G 20171021222827312 27 25 2146575-064165 17 R
42949 17 066A   4171 G 20171021223208323 27 25 2150043-063608 17 R
42949 17 066A   4171 G 20171021223225257 27 25 2150317-063579 17 R
42949 17 066A   4171 G 20171021223242278 27 25 2150578-063538 17 R
42949 17 066A   4171 G 20171021223549334 27 25 2153535-063064 17 R
42949 17 066A   4171 G 20171021223606268 27 25 2153800-063015 17 R
42949 17 066A   4171 G 20171021223623289 27 25 2154082-062977 17 R
42949 17 066A   4171 G 20171021223748307 27 25 2155393-062765 17 R
42949 17 066A   4171 G 20171021223805328 27 25 2155664-062725 17 R
42949 17 066A   4171 G 20171021223947280 27 25 2157268-062470 17 R
42949 17 066A   4171 G 20171021224004300 27 25 2157539-062434 17 R
42949 17 066A   4171 G 20171021224021321 27 25 2157806-062396 17 R
42949 17 066A   4171 G 20171021224038256 27 25 2158071-062344 17 R
42949 17 066A   4171 G 20171021224203273 27 25 2159412-062138 17 R
42949 17 066A   4171 G 20171021224221331 27 25 2159695-062103 17 R
42949 17 066A   4171 G 20171021224345312 27 25 2201008-061886 17 R
42949 17 066A   4171 G 20171021224402332 27 25 2201277-061838 17 R
42949 17 066A   4171 G 20171021224419267 27 25 2201546-061805 17 R
42949 17 066A   4171 G 20171021224436288 27 25 2201807-061762 17 R
42949 17 066A   4171 G 20171021224527264 27 25 2202610-061629 17 R
42949 17 066A   4171 G 20171021224544284 27 25 2202878-061591 17 R
42949 17 066A   4171 G 20171021224601305 27 25 2203148-061550 17 R
42949 17 066A   4171 G 20171021224618326 27 25 2203421-061507 17 R
42949 17 066A   4171 G 20171021224635260 27 25 2203680-061465 17 R
42949 17 066A   4171 G 20171021224652281 27 25 2203948-061422 17 R
42949 17 066A   4171 G 20171021224709302 27 25 2204222-061382 17 R
42949 17 066A   4171 G 20171021224726323 27 25 2204488-061337 17 R
42949 17 066A   4171 G 20171021224743257 27 25 2204757-061292 17 R
42949 17 066A   4171 G 20171021224800278 27 25 2205023-061252 17 R
42949 17 066A   4171 G 20171021224817299 27 25 2205291-061218 17 R
42949 17 066A   4171 G 20171021224834320 27 25 2205553-061174 17 R
42949 17 066A   4171 G 20171021224851254 27 25 2205825-061131 17 R
42949 17 066A   4171 G 20171021224908275 27 25 2206101-061108 17 R
42949 17 066A   4171 G 20171021224942316 27 25 2206632-060996 17 R
42949 17 066A   4171 G 20171021224959337 27 25 2206891-060959 17 R
42949 17 066A   4171 G 20171021225016272 27 25 2207162-060922 17 R
42949 17 066A   4171 G 20171021225033292 27 25 2207443-060884 17 R
42949 17 066A   4171 G 20171021225107334 27 25 2207970-060792 17 R
42949 17 066A   4171 G 20171021225141289 27 25 2208504-060702 17 R
42949 17 066A   4171 G 20171021225158310 27 25 2208775-060671 17 R
42949 17 066A   4171 G 20171021225215331 27 25 2209044-060631 17 R
42949 17 066A   4171 G 20171021225232265 27 25 2209304-060583 17 R
42949 17 066A   4171 G 20171021225249286 27 25 2209591-060542 17 R
42949 17 066A   4171 G 20171021225306307 27 25 2209839-060513 17 R
42949 17 066A   4171 G 20171021225323328 27 25 2210112-060465 17 R
42949 17 066A   4171 G 20171021225340262 27 25 2210377-060427 17 R
42949 17 066A   4171 G 20171021225357283 27 25 2210641-060374 17 R
42949 17 066A   4171 G 20171021225414304 27 25 2210918-060336 17 R
42949 17 066A   4171 G 20171021225431324 27 25 2211182-060298 17 R
42949 17 066A   4171 G 20171021225448259 27 25 2211450-060255 17 R
42949 17 066A   4171 G 20171021225505280 27 25 2211724-060204 17 R
42949 17 066A   4171 G 20171021225539321 27 25 2212267-060136 17 R
42949 17 066A   4171 G 20171021225556256 27 25 2212523-060089 17 R
42949 17 066A   4171 G 20171021225613276 27 25 2212793-060040 17 R
42949 17 066A   4171 G 20171021225630297 27 25 2213065-060013 17 R
42949 17 066A   4171 G 20171021225647318 27 25 2213330-055970 17 R
42949 17 066A   4171 G 20171021225704252 27 25 2213590-055929 17 R
42949 17 066A   4171 G 20171021225721273 27 25 2213867-055874 17 R
42949 17 066A   4171 G 20171021225738294 27 25 2214135-055852 17 R
42949 17 066A   4171 G 20171021225755315 27 25 2214400-055790 17 R
42949 17 066A   4171 G 20171021225812336 27 25 2214668-055758 17 R
42949 17 066A   4171 G 20171021225829270 27 25 2214934-055717 17 R
42949 17 066A   4171 G 20171021225846291 27 25 2215207-055681 17 R
42949 17 066A   4171 G 20171021225903312 27 25 2215473-055627 17 R
42949 17 066A   4171 G 20171021225937267 27 25 2216002-055565 17 R
42949 17 066A   4171 G 20171021225954288 27 25 2216274-055508 17 R
42949 17 066A   4171 G 20171021230011308 27 25 2216541-055471 17 R
42949 17 066A   4171 G 20171021230028329 27 25 2216816-055429 17 R
42949 17 066A   4171 G 20171021230102284 27 25 2217358-055362 17 R
42949 17 066A   4171 G 20171021230136326 27 25 2217885-055265 17 R
42949 17 066A   4171 G 20171021230153260 27 25 2218144-055227 17 R
42949 17 066A   4171 G 20171021230210281 27 25 2218420-055192 17 R
42949 17 066A   4171 G 20171021230227302 27 25 2218688-055140 17 R
42949 17 066A   4171 G 20171021230244323 27 25 2218950-055096 17 R
42949 17 066A   4171 G 20171021230301257 27 25 2219225-055061 17 R
42949 17 066A   4171 G 20171021230318278 27 25 2219494-055017 17 R
42949 17 066A   4171 G 20171021230336336 27 25 2219764-054980 17 R
42949 17 066A   4171 G 20171021230352320 27 25 2220026-054937 17 R
42949 17 066A   4171 G 20171021230409254 27 25 2220300-054898 17 R
42949 17 066A   4171 G 20171021230426275 27 25 2220570-054849 17 R
42949 17 066A   4171 G 20171021230443296 27 25 2220835-054814 17 R
42949 17 066A   4171 G 20171021230500316 27 25 2221106-054771 17 R
42949 17 066A   4171 G 20171021230517337 27 25 2221376-054733 17 R
42949 17 066A   4171 G 20171021230534272 27 25 2221645-054684 17 R
42949 17 066A   4171 G 20171021230551292 27 25 2221910-054654 17 R
42949 17 066A   4171 G 20171021230608313 27 25 2222178-054613 17 R
42949 17 066A   4171 G 20171021230625334 27 25 2222444-054561 17 R
42949 17 066A   4171 G 20171021230642268 27 25 2222721-054544 17 R
42949 17 066A   4171 G 20171021230659289 27 25 2222986-054487 17 R
42949 17 066A   4171 G 20171021230733331 27 25 2223521-054414 17 R
42949 17 066A   4171 G 20171021230750265 27 25 2223786-054361 17 R
42949 17 066A   4171 G 20171021230807286 27 25 2224061-054323 17 R
42949 17 066A   4171 G 20171021230824307 27 25 2224330-054277 17 R
42949 17 066A   4171 G 20171021230841328 27 25 2224598-054249 17 R
42949 17 066A   4171 G 20171021230858262 27 25 2224867-054205 17 R
42949 17 066A   4171 G 20171021230915283 27 25 2225137-054168 17 R
42949 17 066A   4171 G 20171021231555315 27 25 2231460-053219 17 R
42949 17 066A   4171 G 20171021231612336 27 25 2231726-053178 17 R
42949 17 066A   4171 G 20171021231629270 27 25 2231999-053139 17 R
42949 17 066A   4171 G 20171021231646291 27 25 2232270-053109 17 R
42949 17 066A   4171 G 20171021231703312 27 25 2232539-053060 17 R
42949 17 066A   4171 G 20171021231720332 27 25 2232816-053019 17 R
42949 17 066A   4171 G 20171021231737267 27 25 2233076-052976 17 R
42949 17 066A   4171 G 20171021231754288 27 25 2233338-052930 17 R
42949 17 066A   4171 G 20171021231811308 27 25 2233615-052906 17 R
42949 17 066A   4171 G 20171021231828329 27 25 2233894-052854 17 R
42949 17 066A   4171 G 20171021231902284 27 25 2234418-052767 17 R
42949 17 066A   4171 G 20171021231919305 27 25 2234697-052725 17 R
42949 17 066A   4171 G 20171021231936326 27 25 2234964-052684 17 R
42949 17 066A   4171 G 20171021231953260 27 25 2235225-052654 17 R
42949 17 066A   4171 G 20171021232010281 27 25 2235512-052623 17 R
42949 17 066A   4171 G 20171021232027302 27 25 2235778-052580 17 R
42949 17 066A   4171 G 20171021232101257 27 25 2236314-052496 17 R
42949 17 066A   4171 G 20171021232118278 27 25 2236587-052456 17 R
42949 17 066A   4171 G 20171021232135299 27 25 2236842-052417 17 R
42949 17 066A   4171 G 20171021232152320 27 25 2237117-052380 17 R
42949 17 066A   4171 G 20171021232209254 27 25 2237393-052342 17 R
42949 17 066A   4171 G 20171021232226275 27 25 2237676-052297 17 R

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Setup: EOS70D, 85mm F/1.4, 10s, 800ISO, NexStar mount, NTP timing
IOD format: http://www.satobs.org/position/IODformat.html
COSPAR 4171: 52.8344N, 6.3785E, 10m (WGS84)
------------------------------------------------------------------

Regards,
   Cees
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Received on Sat Oct 21 2017 - 18:59:45 UTC

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