"Pseudo-MPEC" for TianweB = Tianwen-1 booster

Created 2020 Jul 26 16:18:29 UT using Find_Orb

Click here for an explanation of pseudo-MPECs

We also have data for the Tianwen-1 spacecraft. It took us a while to figure out which object was the booster and which was the spacecraft, but we're now confident of the identification.

 
 Astrometry: 
     TianweB KC2020 07 24.06585200 46 11.114+14 37 57.91         15.1 G      J04
     TianweB KC2020 07 24.06818000 46 10.795+14 38 25.01         15.1 G      J04
     TianweB KC2020 07 24.07051300 46 10.420+14 38 51.92         15.1 G      J04
     TianweB  CK200724:022307   011.26580   +14.60272            15.1 GV     I89
     TianweB  CK200724:022610   011.26183   +14.60817            15.3 GV     I89
     TianweB  CK200724:023039   011.25551   +14.61631            16.1 GV     I89
     TianweB KC2020 07 24.10567100 45 59.840+14 45 09.84         15.3 G      J04
     TianweB  CK200724:023458   011.24968   +14.62379            15.1 GV     I89
     TianweB KC2020 07 24.10797700 45 58.885+14 45 32.72         15.2 G      J04
     TianweB KC2020 07 24.20525300 44 56.340+14 58 11.03         15.3 G      J04
     TianweB KC2020 07 24.20757100 44 54.591+14 58 24.01         15.4 G      J04
     TW001a   CK200724:191237   012.45843   +15.25132            16.3 GV     N88
     TW001a   CK200724:192330   012.45118   +15.26100            16.8 GV     N88
     TW001a   CK200724:193607   012.44183   +15.27163            16.2 GV     N88
     TW001a   CK200724:194845   012.43138   +15.28226            16.5 GV     N88
     TianweB KC2020 07 25.04562100 50 45.267+15 26 19.45         16.9 G      Z84
     TianweB KC2020 07 25.04939800 50 44.308+15 26 34.59         16.7 G      Z84
     TianweB KC2020 07 25.05317400 50 43.345+15 26 49.06         16.6 G      Z84
     TianweB KC2020 07 25.05695400 50 42.341+15 27 03.29         16.7 G      Z84
     TianweB KC2020 07 25.06407 00 50 15.73 +15 24 06.3          16.7 G      204
     TianweB KC2020 07 25.06650 00 50 14.97 +15 24 14.1          16.7 G      204
     TianweB KC2020 07 25.06893 00 50 14.18 +15 24 21.7          16.7 G      204
     TianweB KC2020 07 25.07136 00 50 13.38 +15 24 29.2          16.7 G      204
     TianweB KC2020 07 25.07380 00 50 12.57 +15 24 36.7          16.7 G      204
     TianweB KC2020 07 25.07776 00 50 11.20 +15 24 49.0          16.8 G      204
     TianweB KC2020 07 25.08020 00 50 10.37 +15 24 56.1          16.8 G      204
     TianweB KC2020 07 25.08263 00 50 09.53 +15 25 03.3          16.8 G      204
     TianweB KC2020 07 25.08506 00 50 08.68 +15 25 10.2          16.8 G      204
     TianweB KC2020 07 25.08749 00 50 07.79 +15 25 17.1          16.9 G      204
     TianweB KC2020 07 25.12635200 50 16.579+15 30 49.19         16.9 G      Z84
     TianweB KC2020 07 25.12909100 50 15.358+15 30 56.32         16.8 G      Z84
     TianweB KC2020 07 25.13184200 50 14.113+15 31 03.47         16.8 G      Z84
     TianweB KC2020 07 25.13459400 50 12.864+15 31 10.50         16.9 G      Z84
     TianweB KC2020 07 25.18418200 49 49.189+15 32 53.54         16.8 G      Z84
     Tianw1B  CK200725:212337   012.91269   +15.70488            17.8 GV     N88
     Tianw1B  CK200725:212944   012.90649   +15.70653            17.5 GV     N88
     Tianw1B  CK200725:213549   012.90084   +15.70811            17.4 GV     N88
     TianweB  CK200725:23383435 013.08431   +15.63504            17.7 GV     J95
     TianweB  CK200725:23430634 013.08411   +15.63713            17.9 GV     J95
     TianweB  CK200725:23473428 013.08364   +15.63895            17.5 GV     J95
     TianweB KC2020 07 26.12582700 52 06.976+15 47 11.03         17.5 G      Z84
     TianweB KC2020 07 26.12750400 52 06.408+15 47 13.32         17.6 G      Z84
     TianweB KC2020 07 26.12918600 52 05.818+15 47 15.68         17.8 G      Z84

Station data:
(204) Schiaparelli Observatory  (N45.867933 E8.770800)  Italy.  Observer L.
   Buzzi. 0.60-m f/4.64 Newtonian + CCD.
(I89) iTelescope Observatory, Nerpio  (N38.165287 W2.326100)  Spain.
   Observer M. Suzuki.
(J04) ESA Optical Ground Station, Tenerife  (N28.300924 W16.511830)  Canary
   Islands (Spain).  Observer D. Abreu. Measurers M. Micheli, D. Koschny, E.
   Schwab, M. Busch, A. Knöfel. 1.0-m f/4.4 reflector + CCD.
(J95) Great Shefford  (N51.474969 W1.447003)  UK.  Observer P. Birtwhistle.
(N88) Xingming Observatory #3, Nanshan  (N43.471787 E87.173220)  China.
   Observer X. Gao. Measurers M. Zhang, Q.-Z. Ye.
(Z84) Calar Alto-Schmidt  (N37.223981 W2.548143)  Spain.  Observer E. Schwab.
   Measurers E. Schwab, D. Koschny, M. Micheli. 0.8-m f/3 Schmidt + CCD.

Orbital elements:  TianweB (geocentric,  hyperbolic escape) 
   Perigee 2020 Jul 23.2194966 +/- 0.000122 TT =  5:16:04.50 (JD 2459053.7194966)
Epoch 2020 Jul 23.3 TT = JDT 2459053.8                        Find_Orb
q  6652.3613467 +/- 5.79            (J2000 equator)
H   26.3  G 0.15                    Peri.  252.7406326 +/- 0.014
                                    Node   339.2565700 +/- 0.017
e   1.216046912 +/- 0.000333        Incl.   27.2742914 +/- 0.00028
From 43 observations 2020 July 24-26; mean residual 0".568

Orbital elements:  TianweB (heliocentric,  Mars cruise) 
   Perihelion 2020 Jul 18.4135073 +/- 0.000169 TT =  9:55:27.03 (JD 2459048.9135073)
Epoch 2020 Oct  1.0 TT = JDT 2459123.5   Earth MOID: 0.0002   Ma: 0.0042
M  48.1062026155 +/- 0.008          (J2000 ecliptic)          Find_Orb
n   0.6449720439 +/- 0.000113       Peri.  355.5009808 +/- 0.0008
a   1.3267083284 +/- 0.000155       Node   299.9587433 +/- 0.00042
e   0.234530336 +/- 9e-5            Incl.    1.0446863 +/- 0.00031
P   1.53/558.15d           H 26.3   G  0.15   U  6.6
q 1.0155549774 +/- 4.61e-7    Q 1.6378616794 +/- 0.000311
From 43 observations 2020 July 24-26; mean residual 0".568

Orbital elements:  TianweB,  arrival at Mars 
   Perimars 2021 Jan 17.2024549 +/- 0.157 TT =  4:51:32.10 (JD 2459231.7024549)
Epoch 2021 Jan 17.0 TT = JDT 2459231.5                        Find_Orb
q   0.0148088792 +/- 3.74e-5        (J2000 ecliptic)
H   26.3  G 0.15                    Peri.  188.1819571 +/- 1.1
                                    Node   111.7544583 +/- 1.2
e 476.249547944 +/- 2.94            Incl.   18.5160032 +/- 0.09
From 43 observations 2020 July 24-26; mean residual 0".568
Residuals in arcseconds: 
200724 J04 1.42+ 1.17-    200725 Z84 .122+ .124+    200725 Z84 .343- .277+
200724 J04 1.43+ 1.07-    200725 Z84 .330- .441+    200725 Z84 .433- .281+
200724 J04 1.30+ 1.00-    200725 Z84 .141- .288+    200725 Z84 .423- .297+
200724 I89 .404+ .567-    200725 Z84 .155+ .079+    200725 Z84 .693- .227+
200724 I89 .593+ .696-    200725 204 .230- .071-    200725 N88 .428+ .068-
200724 I89 .344- .064-    200725 204 .090- .031+    200725 N88 .462- .183-
200724 J04 .852+ .635-    200725 204 .211- .023+    200725 N88 .631+ .308-
200724 I89 .153+ .340-    200725 204 .308- 4.2m+    200725 J95 .377+ .581-
200724 J04 1.35+ .711-    200725 204 .338- .045+    200725 J95 .648+ .263-
200724 J04 .621- .496+    200725 204 .849- .433+    200725 J95 .287+ .771-
200724 J04 .629- .459+    200725 204 .758- .314+    200726 Z84 .636+ .109-
200724 N88 .171- .340+    200725 204 .715- .417+    200726 Z84 .683+ .234-
200724 N88 .347- .707+    200725 204 .675- .311+    200726 Z84 .480+ .264-
200724 N88 .353- .144+    200725 204 1.08- .298+
200724 N88 .614- .798+    200725 Z84 .365- .394+

Ephemerides (geocentric):
Date (UTC) HH   RA              Dec         delta   r     elong  mag " sig PA
---- --------  --------------  -----------  -----  ------ -----  --- --------
2020 07 24 00  00 41 34.943   +14 55 39.51   302760 1.0164 105.6 15.4 .699 135
2020 07 24 01  00 42 12.502   +14 59 30.80   316913 1.0164 105.5 15.5 .677 134
2020 07 24 02  00 42 46.864   +15 03 01.88   331018 1.0165 105.4 15.6 .656 134
2020 07 24 03  00 43 18.428   +15 06 15.31   345077 1.0165 105.3 15.7 .636 134
2020 07 24 04  00 43 47.527   +15 09 13.25   359096 1.0165 105.2 15.8 .618 133
2020 07 24 05  00 44 14.445   +15 11 57.51   373075 1.0165 105.1 15.9 .602 133
2020 07 24 06  00 44 39.421   +15 14 29.62   387020 1.0165 105.1 16.0 .586 133
2020 07 24 07  00 45 02.661   +15 16 50.89   400931 1.0165 105.0 16.1 .571 132
2020 07 24 08  00 45 24.342   +15 19 02.45   414811 1.0166 104.9 16.1 .557 132
2020 07 24 09  00 45 44.619   +15 21 05.27   428663 1.0166 104.9 16.2 .544 132
2020 07 24 10  00 46 03.625   +15 23 00.19   442487 1.0166 104.8 16.3 .531 132
2020 07 24 11  00 46 21.476   +15 24 47.95   456287 1.0166 104.8 16.3 .519 132
2020 07 24 12  00 46 38.277   +15 26 29.21   470062 1.0166 104.8 16.4 .508 132
2020 07 24 13  00 46 54.117   +15 28 04.53   483815 1.0166 104.7 16.5 .497 132
2020 07 24 14  00 47 09.079   +15 29 34.42   497546 1.0167 104.7 16.5 .487 132
2020 07 24 15  00 47 23.232   +15 30 59.34   511257 1.0167 104.7 16.6 .476 132
2020 07 24 16  00 47 36.642   +15 32 19.67   524949 1.0167 104.7 16.7 .467 132
2020 07 24 17  00 47 49.365   +15 33 35.77   538624 1.0167 104.7 16.7 .458 132
2020 07 24 18  00 48 01.454   +15 34 47.98   552280 1.0167 104.6 16.8 .449 132
2020 07 24 19  00 48 12.955   +15 35 56.57   565921 1.0168 104.6 16.8 .440 133
2020 07 24 20  00 48 23.909   +15 37 01.82   579546 1.0168 104.6 16.9 .432 133
2020 07 24 21  00 48 34.355   +15 38 03.95   593156 1.0168 104.6 16.9 .424 133
2020 07 24 22  00 48 44.328   +15 39 03.17   606752 1.0168 104.6 17.0 .416 133
2020 07 24 23  00 48 53.858   +15 39 59.69   620334 1.0168 104.6 17.0 .409 133
2020 07 25 00  00 49 02.975   +15 40 53.69   633903 1.0168 104.6 17.1 .402 134
2020 07 25 01  00 49 11.705   +15 41 45.32   647460 1.0169 104.6 17.1 .395 134
2020 07 25 02  00 49 20.071   +15 42 34.73   661005 1.0169 104.6 17.2 .388 134
2020 07 25 03  00 49 28.096   +15 43 22.05   674538 1.0169 104.6 17.2 .382 135
2020 07 25 04  00 49 35.801   +15 44 07.43   688061 1.0169 104.6 17.2 .375 135
2020 07 25 05  00 49 43.204   +15 44 50.96   701573 1.0169 104.6 17.3 .369 135
2020 07 25 06  00 49 50.321   +15 45 32.76   715074 1.0170 104.6 17.3 .363 136
2020 07 25 07  00 49 57.170   +15 46 12.92   728566 1.0170 104.7 17.4 .358 136
2020 07 25 08  00 50 03.765   +15 46 51.53   742049 1.0170 104.7 17.4 .352 136
2020 07 25 09  00 50 10.119   +15 47 28.68   755522 1.0170 104.7 17.4 .347 137
2020 07 25 10  00 50 16.246   +15 48 04.45   768986 1.0170 104.7 17.5 .342 137
2020 07 25 11  00 50 22.157   +15 48 38.91   782442 1.0171 104.7 17.5 .337 138
2020 07 25 12  00 50 27.864   +15 49 12.12   795890 1.0171 104.7 17.6 .332 138
2020 07 25 13  00 50 33.376   +15 49 44.16   809330 1.0171 104.7 17.6 .327 138
2020 07 25 14  00 50 38.703   +15 50 15.07   822762 1.0171 104.8 17.6 .322 139
2020 07 25 15  00 50 43.854   +15 50 44.91   836187 1.0171 104.8 17.7 .318 139
2020 07 25 16  00 50 48.838   +15 51 13.74   849605 1.0172 104.8 17.7 .314 140
2020 07 25 17  00 50 53.662   +15 51 41.61   863015 1.0172 104.8 17.7 .309 140
2020 07 25 18  00 50 58.333   +15 52 08.54   876419 1.0172 104.8 17.8 .305 141
2020 07 25 19  00 51 02.860   +15 52 34.60   889816 1.0172 104.8 17.8 .301 141
2020 07 25 20  00 51 07.248   +15 52 59.82   903207 1.0173 104.9 17.8 .297 142
2020 07 25 21  00 51 11.502   +15 53 24.23   916592 1.0173 104.9 17.9 .294 142
2020 07 25 22  00 51 15.630   +15 53 47.88   929971 1.0173 104.9 17.9 .290 143
2020 07 25 23  00 51 19.637   +15 54 10.79   943344 1.0173 104.9 17.9 .287 143
2020 07 26 00  00 51 23.527   +15 54 33.00   956711 1.0173 105.0 17.9 .283 144
2020 07 26 01  00 51 27.305   +15 54 54.53   970073 1.0174 105.0 18.0 .280 144
2020 07 26 02  00 51 30.977   +15 55 15.41   983429 1.0174 105.0 18.0 .277 145
2020 07 26 03  00 51 34.546   +15 55 35.68   996780 1.0174 105.0 18.0 .274 145
2020 07 26 04  00 51 38.016   +15 55 55.35   .00675 1.0174 105.0 18.1 .270 146
2020 07 26 05  00 51 41.392   +15 56 14.44   .00684 1.0174 105.1 18.1 .268 146
2020 07 26 06  00 51 44.676   +15 56 32.99   .00693 1.0175 105.1 18.1 .265 147
2020 07 26 07  00 51 47.873   +15 56 51.00   .00702 1.0175 105.1 18.1 .262 148
2020 07 26 08  00 51 50.986   +15 57 08.51   .00711 1.0175 105.1 18.2 .259 148
2020 07 26 09  00 51 54.018   +15 57 25.53   .00720 1.0175 105.2 18.2 .257 149
2020 07 26 10  00 51 56.971   +15 57 42.08   .00729 1.0176 105.2 18.2 .254 149
2020 07 26 11  00 51 59.849   +15 57 58.17   .00738 1.0176 105.2 18.2 .252 150
2020 07 26 12  00 52 02.655   +15 58 13.83   .00746 1.0176 105.3 18.3 .249 150
2020 07 26 13  00 52 05.390   +15 58 29.06   .00755 1.0176 105.3 18.3 .247 151
2020 07 26 14  00 52 08.058   +15 58 43.88   .00764 1.0177 105.3 18.3 .245 152
2020 07 26 15  00 52 10.661   +15 58 58.31   .00773 1.0177 105.3 18.3 .242 152
2020 07 26 16  00 52 13.201   +15 59 12.36   .00782 1.0177 105.4 18.4 .240 153
2020 07 26 17  00 52 15.679   +15 59 26.05   .00791 1.0177 105.4 18.4 .238 153
2020 07 26 18  00 52 18.099   +15 59 39.37   .00800 1.0177 105.4 18.4 .236 154
2020 07 26 19  00 52 20.462   +15 59 52.36   .00809 1.0178 105.5 18.4 .234 155
2020 07 26 20  00 52 22.770   +16 00 05.01   .00818 1.0178 105.5 18.5 .233 155
2020 07 26 21  00 52 25.025   +16 00 17.35   .00826 1.0178 105.5 18.5 .231 156
2020 07 26 22  00 52 27.228   +16 00 29.37   .00835 1.0178 105.5 18.5 .229 156
2020 07 26 23  00 52 29.381   +16 00 41.09   .00844 1.0179 105.6 18.5 .227 157
2020 07 27 00  00 52 31.485   +16 00 52.52   .00853 1.0179 105.6 18.5 .226 158
2020 07 27 01  00 52 33.543   +16 01 03.66   .00862 1.0179 105.6 18.6 .224 158
2020 07 27 02  00 52 35.555   +16 01 14.53   .00871 1.0179 105.7 18.6 .223 159
2020 07 27 03  00 52 37.523   +16 01 25.14   .00880 1.0180 105.7 18.6 .221 159
2020 07 27 04  00 52 39.448   +16 01 35.49   .00888 1.0180 105.7 18.6 .220 160
2020 07 27 05  00 52 41.331   +16 01 45.59   .00897 1.0180 105.8 18.7 .218 161
2020 07 27 06  00 52 43.175   +16 01 55.44   .00906 1.0180 105.8 18.7 .217 161
2020 07 27 07  00 52 44.979   +16 02 05.06   .00915 1.0181 105.8 18.7 .216 162
2020 07 27 08  00 52 46.744   +16 02 14.45   .00924 1.0181 105.9 18.7 .214 163
2020 07 27 09  00 52 48.473   +16 02 23.62   .00933 1.0181 105.9 18.7 .213 163
2020 07 27 10  00 52 50.166   +16 02 32.57   .00942 1.0181 105.9 18.8 .212 164
2020 07 27 11  00 52 51.824   +16 02 41.32   .00950 1.0182 105.9 18.8 .211 164
2020 07 27 12  00 52 53.448   +16 02 49.85   .00959 1.0182 106.0 18.8 .210 165
2020 07 27 13  00 52 55.039   +16 02 58.19   .00968 1.0182 106.0 18.8 .209 166
2020 07 27 14  00 52 56.597   +16 03 06.34   .00977 1.0182 106.0 18.8 .208 166
2020 07 27 15  00 52 58.124   +16 03 14.29   .00986 1.0183 106.1 18.8 .207 167
2020 07 27 16  00 52 59.621   +16 03 22.07   .00995 1.0183 106.1 18.9 .206 167
2020 07 27 17  00 53 01.088   +16 03 29.66   .01003 1.0183 106.1 18.9 .205 168
2020 07 27 18  00 53 02.526   +16 03 37.08   .01012 1.0183 106.2 18.9 .204 169
2020 07 27 19  00 53 03.935   +16 03 44.34   .01021 1.0184 106.2 18.9 .203 169
2020 07 27 20  00 53 05.317   +16 03 51.42   .01030 1.0184 106.2 18.9 .203 170
2020 07 27 21  00 53 06.672   +16 03 58.35   .01039 1.0184 106.3 19.0 .202 171
2020 07 27 22  00 53 08.001   +16 04 05.12   .01048 1.0184 106.3 19.0 .201 171
2020 07 27 23  00 53 09.305   +16 04 11.73   .01056 1.0185 106.3 19.0 .201 172
2020 07 28 00  00 53 10.584   +16 04 18.20   .01065 1.0185 106.4 19.0 .200 172
2020 07 28 01  00 53 11.838   +16 04 24.52   .01074 1.0185 106.4 19.0 .199 173
2020 07 28 02  00 53 13.068   +16 04 30.70   .01083 1.0186 106.4 19.0 .199 174
2020 07 28 03  00 53 14.276   +16 04 36.74   .01092 1.0186 106.5 19.1 .198 174