"Pseudo-MPEC" for S510977
Created 2017 Mar 25 13:11:19 UT using Find_Orb
I think this may be the same object as S510210, an object tracked briefly in July 2016, also by (Y00) SONEAR in Brazil. Here are elements for the current object for July 2016; you'll see that they resemble the elements for S510210.
Orbital elements: S510977 Perigee 2016 Jul 11.078358 +/- 0.218 TT = 1:52:50 (JD 2457580.578358) Epoch 2016 Jul 11.0 TT = JDT 2457580.5 Gray M 329.09138 +/- 80 (J2000 equatorial) n 394.45617610 +/- 0.319 Peri. 347.85075 +/- 0.8 a 39743.9473 +/- 21.5 Node 1.51436 +/- 0.7 e 0.8079288 +/- 0.000237 Incl. 32.11589 +/- 0.0024 P1314.19m/0.913d H 31.8 G 0.15 U 12.0 q 7633.66690 +/- 13.5 Q 71854.2278 +/- 29.6 From 27 observations 2017 Mar. 24-25 (4.8 hr); mean residual 1".049
I'm not totally certain of this. The match isn't perfect; that may just reflect the fact that we don't know what solar radiation pressure is doing to the object. It may also be just another case where there are two or more objects in very similar orbits.
Astrometry:
S510977 tC2017 03 24.92952 12 10 36.30 -14 25 04.7 15.4 R Y00
S510977 tC2017 03 24.93063 12 10 51.07 -14 27 42.5 15.4 R Y00
S510977 tC2017 03 24.93167 12 11 04.97 -14 30 13.9 15.4 R Y00
S510977 tC2017 03 25.00837 12 27 00.16 -17 30 12.6 15.4 R Y00
S510977 C2017 03 25.00864 12 27 03.38 -17 30 50.5 15.0 R Y00
S510977 C2017 03 25.00890 12 27 06.38 -17 31 25.4 15.0 R Y00
S510977 C2017 03 25.00920 12 27 09.82 -17 32 06.7 15.1 R Y00
S510977 C2017 03 25.00944 12 27 12.73 -17 32 39.8 15.1 R Y00
S510977 C2017 03 25.00976 12 27 16.39 -17 33 22.5 15.0 R Y00
S510977 tC2017 03 25.01005 12 27 19.71 -17 34 01.1 15.5 R Y00
S510977 tC2017 03 25.01072 12 27 27.54 -17 35 33.1 15.5 R Y00
S510977 tC2017 03 25.01103 12 27 31.12 -17 36 15.1 15.5 R Y00
S510977 tC2017 03 25.01133 12 27 34.70 -17 36 56.8 15.4 R Y00
S510977 C2017 03 25.01162 12 27 37.96 -17 37 36.3 14.8 R Y00
S510977 tC2017 03 25.01191 12 27 41.34 -17 38 13.8 15.4 R Y00
S510977 tC2017 03 25.01263 12 27 49.80 -17 39 52.9 15.5 R Y00
S510977 tC2017 03 25.01299 12 27 53.85 -17 40 41.0 15.5 R Y00
S510977 tC2017 03 25.01335 12 27 57.94 -17 41 29.4 15.5 R Y00
S510977 tC2017 03 25.12527 12 49 15.40 -21 44 43.4 16.0 R Y00
S510977 tC2017 03 25.12559 12 49 19.36 -21 45 24.9 15.8 R Y00
S510977 C2017 03 25.12590 12 49 22.92 -21 46 03.2 15.2 R Y00
S510977 C2017 03 25.12615 12 49 25.94 -21 46 34.1 15.7 R Y00
S510977 C2017 03 25.12641 12 49 29.08 -21 47 06.3 15.7 R Y00
S510977 tC2017 03 25.12674 12 49 32.94 -21 47 47.9 15.9 R Y00
S510977 tC2017 03 25.12710 12 49 37.25 -21 48 34.0 15.9 R Y00
S510977 tC2017 03 25.12779 12 49 45.43 -21 49 59.1 15.8 R Y00
S510977 tC2017 03 25.12809 12 49 49.17 -21 50 37.6 15.8 R Y00
Station data:
(Y00) SONEAR Observatory, Oliveira (S20.715080 W44.784960) Brazil.
Observers C. Jacques, E. Pimentel, J. Barros. Measurer C. Jacques. 0.28-m
f/2.2 astrograph + CCD.
Orbital elements: S510977
Perigee 2017 Mar 25.453314 +/- 0.000394 TT = 10:52:46 (JD 2457837.953314)
Epoch 2017 Mar 25.0 TT = JDT 2457837.5 Gray
M 181.19168 +/- 0.036 (J2000 equatorial)
n 394.44692201 +/- 0.335 Peri. 36.54610 +/- 0.020
a 39744.5690 +/- 22.5 Node 329.88772 +/- 0.020
e 0.8126352 +/- 0.000235 Incl. 30.90570 +/- 0.00054
P1314.22m/0.913d H 31.8 G 0.15 U 12.0
q 7446.73315 +/- 13.6 Q 72042.4048 +/- 31.5
From 27 observations 2017 Mar. 24-25 (4.8 hr); mean residual 1".049
Residuals in arcseconds: 170324 Y00 3.06+ 3.20- 170325 Y00 .645- .846+ 170325 Y00 .305+ .112+ 170324 Y00 .516- 1.35+ 170325 Y00 .021+ .048- 170325 Y00 2.16+ 1.16- 170324 Y00 2.45- 1.88+ 170325 Y00 .253- .090+ 170325 Y00 .068+ .494- 170325 Y00 .706- .688+ 170325 Y00 1.15+ .841- 170325 Y00 .436+ .024+ 170325 Y00 .379+ .443- 170325 Y00 .340- .940- 170325 Y00 .785+ .494+ 170325 Y00 1.3m- .057+ 170325 Y00 .100- .952+ 170325 Y00 .553- .354+ 170325 Y00 .731- .407- 170325 Y00 1.54+ .385- 170325 Y00 .676- .526- 170325 Y00 .959+ .844- 170325 Y00 .168- .375+ 170325 Y00 2.17- 1.02+ 170325 Y00 .084+ 3.7m- 170325 Y00 1.28- .823+ 170325 Y00 .311- .183+ Ephemerides (geocentric): Date (UTC) HH RA Dec delta r elong mag " sig PA ---- -- -- -- ------------ ------------ ------ ------ ----- --- ---- --- 2017 03 25 00 12 10 21.668 -17 55 21.75 72038 0.9977 163.7 16.1 4.7 79 2017 03 25 01 12 21 32.854 -19 10 06.64 71558 0.9977 162.5 16.1 4.3 86 2017 03 25 02 12 33 11.404 -20 24 03.81 70259 0.9977 160.9 16.1 3.4 92 2017 03 25 03 12 45 37.072 -21 38 34.04 68112 0.9977 158.9 16.1 1.4 96 2017 03 25 04 12 59 16.163 -22 55 01.46 65070 0.9977 156.4 16.1 2.5 99 2017 03 25 05 13 14 47.305 -24 15 00.38 61059 0.9977 153.5 16.1 9 100 2017 03 25 06 13 33 13.112 -25 40 20.65 55963 0.9976 149.9 16.0 22 101 2017 03 25 07 13 56 27.289 -27 13 01.13 49607 0.9976 145.2 15.8 49 100 2017 03 25 08 14 28 29.934 -28 53 47.98 41706 0.9976 138.6 15.7 106 98 2017 03 25 09 15 19 59.996 -30 31 33.49 31760 0.9975 128.1 15.4 265 93 2017 03 25 10 17 14 22.195 -29 32 48.38 18806 0.9974 104.6 14.9 1059 80 2017 03 25 11 02 39 04.152 +29 20 29.05 8136 0.9973 43.4 16?? 7483 80 2017 03 25 12 08 38 42.647 +11 37 09.00 22816 0.9975 124.0 14.8 1162 120 2017 03 25 13 09 43 59.015 +02 15 21.46 34796 0.9976 141.3 15.2 564 122 2017 03 25 14 10 17 31.850 -02 45 21.97 44099 0.9977 149.9 15.5 380 122 2017 03 25 15 10 40 23.640 -06 07 31.80 51529 0.9977 155.3 15.6 292 122 2017 03 25 16 10 58 08.489 -08 40 25.00 57510 0.9978 159.0 15.8 242 122 2017 03 25 17 11 13 00.899 -10 44 41.35 62289 0.9978 161.6 15.9 210 121 2017 03 25 18 11 26 08.551 -12 30 49.46 66020 0.9979 163.3 15.9 189 120 2017 03 25 19 11 38 11.060 -14 04 51.50 68805 0.9979 164.3 16.0 175 120 2017 03 25 20 11 49 34.639 -15 30 37.35 70712 0.9979 164.7 16.0 165 119 2017 03 25 21 12 00 38.771 -16 50 45.39 71780 0.9980 164.5 16.1 160 118 2017 03 25 22 12 11 39.780 -18 07 13.57 72034 0.9980 163.8 16.1 159 117 2017 03 25 23 12 22 53.174 -19 21 37.04 71477 0.9980 162.7 16.1 161 115 2017 03 26 00 12 34 35.654 -20 35 19.40 70098 0.9980 161.1 16.1 168 114 2017 03 26 01 12 47 07.430 -21 49 40.97 67869 0.9980 159.2 16.1 182 113 2017 03 26 02 13 00 55.672 -23 06 05.88 64739 0.9980 156.8 16.1 204 111 2017 03 26 03 13 16 40.640 -24 26 08.72 60630 0.9979 153.8 16.0 240 109 2017 03 26 04 13 35 28.232 -25 51 39.14 55423 0.9979 150.2 15.9 299 107 2017 03 26 05 13 59 19.562 -27 24 31.93 48936 0.9979 145.4 15.8 405 104 2017 03 26 06 14 32 34.800 -29 05 05.91 40867 0.9978 138.6 15.6 622 100 2017 03 26 07 15 27 06.409 -30 38 48.45 30687 0.9977 127.6 15.3 1197 94 2017 03 26 08 17 34 16.233 -28 41 31.42 17378 0.9977 101.2 14.9 4143 78 2017 03 26 09 04 08 27.124 +30 51 43.37 9210 0.9976 60.8 15.5 257' 91 2017 03 26 10 08 48 16.386 +10 14 27.93 24101 0.9977 125.6 14.8 2476 120 2017 03 26 11 09 48 10.519 +01 33 16.59 35778 0.9979 141.6 15.2 1189 121 2017 03 26 12 10 20 14.939 -03 14 01.61 44878 0.9979 149.8 15.5 784 122 2017 03 26 13 10 42 28.288 -06 29 52.58 52157 0.9980 155.0 15.7 594 121 2017 03 26 14 10 59 52.717 -08 59 10.58 58016 0.9981 158.6 15.8 488 121 2017 03 26 15 11 14 33.152 -11 01 10.04 62689 0.9981 161.2 15.9 422 120 2017 03 26 16 11 27 33.513 -12 45 44.44 66327 0.9982 163.0 15.9 379 119 2017 03 26 17 11 39 31.682 -14 18 39.11 69027 0.9982 164.1 16.0 350 119 2017 03 26 18 11 50 53.014 -15 43 34.97 70853 0.9982 164.6 16.0 333 118 2017 03 26 19 12 01 56.564 -17 03 05.28 71844 0.9982 164.5 16.1 323 117 2017 03 26 20 12 12 58.488 -18 19 04.98 72021 0.9982 163.9 16.1 321 116 2017 03 26 21 12 24 14.324 -19 33 07.40 71387 0.9982 162.9 16.1 327 115 2017 03 26 22 12 36 00.997 -20 46 35.14 69929 0.9982 161.4 16.1 342 114 2017 03 26 23 12 48 39.205 -22 00 48.07 67618 0.9982 159.5 16.1 369 112 2017 03 27 00 13 02 37.035 -23 17 10.32 64399 0.9982 157.1 16.1 411 111 2017 03 27 01 13 18 36.484 -24 37 16.63 60193 0.9982 154.2 16.0 478 109