"Pseudo-MPEC" for P12onSi
Created 2026 Jul 18 17:35:04 UT using Find_Orb
Click here for an explanation of pseudo-MPECs
Astrometry:
P12onSi 0C2026 06 23.54547921 49 19.008-27 32 32.21 ~7HCZ 21.68GVNEOCPF51
P12onSi 0C2026 06 23.55747321 49 19.669-27 32 26.09 ~7HCZ 21.58GVNEOCPF51
P12onSi 0C2026 06 23.56945821 49 20.376-27 32 19.99 ~7HCZ 21.51GVNEOCPF51
P12onSi 0C2026 06 23.58144121 49 21.031-27 32 13.64 ~7HCZ 22.29GVNEOCPF51
P12onSi*0C2026 07 15.50301522 00 32.556-24 05 16.97 ~7FE5 20.39wXNEOCPF51
P12onSi 0C2026 07 15.51988522 00 32.393-24 05 06.66 ~7FE5 20.69wXNEOCPF51
P12onSi 0C2026 07 15.53028022 00 32.294-24 05 00.32 ~7FE5 20.90wXNEOCPF51
P12onSi 0C2026 07 15.54066822 00 32.186-24 04 53.77 ~7FE5 21.03wXNEOCPF51
P12onSi 0C2026 07 15.59454122 00 31.663-24 04 20.02 ~7FFZ 20.86GVNEOCPF51
P12onSi 0C2026 07 15.59519222 00 31.649-24 04 19.67 ~7FFZ 20.79GVNEOCPF51
P12onSi 3C2026 07 17.43249222 00 21.811-23 45 09.27 ~7HCK 20.54GVNEOCPT14
P12onSi 3C2026 07 17.43346422 00 21.798-23 45 08.69 ~7HCK 20.53GVNEOCPT14
P12onSi 3C2026 07 17.43443822 00 21.785-23 45 08.09 ~7HCK 20.56GVNEOCPT14
Station data:
(F51) Pan-STARRS 1, Haleakala (N20.707234 W156.255910) US/Hawaii.
Observers J. Herman, T. Lowe, P. Minguez, A. Schultz, I. Smith. Measurers
K. Chambers, T. de Boer, J. Fairlamb, H. Gao, M. Huber, C.-C. Lin, E.
Magnier, Y. Ramanjooloo, R. Wainscoat, R. Weryk. 1.8-m Ritchey-Chrétien +
CCD.
(T14) Mauna Kea-UH/Tholen NEO Follow-Up (CFHT) (N19.825252 W155.468876)
US/Hawaii. Observer R. Weryk. 3.6-m Canada-France-Hawaii Telescope.
Orbital elements: P12onSi
Perihelion 2026 Jul 19.151535 +/- 0.0465 TT = 3:38:12.6 (JD 2461240.651535)
Epoch 2026 Jul 17.0 TT = JDT 2461238.5 Earth MOID: 0.4856 AutoNEOCP
M 359.349281060 +/- 0.014 (J2000 ecliptic)
n 0.302444030 +/- 0.000144 Peri. 334.928780 +/- 0.033
a 2.198059131 +/- 0.000698 Node 330.236301 +/- 0.0051
e 0.31979858 +/- 0.000169 Incl. 8.691804 +/- 0.0014
P 3.25881 H 20.42 G 0.15 U 6.8
q 1.495122941 +/- 0.00011 Q 2.900995321 +/- 0.00129
From 13 observations 2026 June 23-July 17; mean residual 0".08
Residuals in arcseconds: 260623 F51 .05+ .01- 260715 F51 .06- .01+ 260717 T14 .02- .01+ 260623 F51 .19- .02- 260715 F51 .01+ .06- 260717 T14 .00 .01- 260623 F51 .21+ .07- 260715 F51 .04- .06+ 260717 T14 .02+ .00 260623 F51 .07- .10+ 260715 F51 .16+ .00 260715 F51 .11- .05+ 260715 F51 .05+ .06- Ephemerides (geocentric): Date (UTC) HH RA Dec delta r elong mag " sig PA ---- -------- ------------ ------------ ------ ------ ----- --- -------- 2026 07 18 18 22 00 07.199 -23 31 01.52 .52578 1.4951 150.1 20.9 .103 98 2026 07 18 19 22 00 06.675 -23 30 34.85 .52566 1.4951 150.1 20.9 .106 98 2026 07 18 20 22 00 06.146 -23 30 08.17 .52553 1.4951 150.2 20.9 .109 98 2026 07 18 21 22 00 05.612 -23 29 41.48 .52541 1.4951 150.2 20.9 .111 98 2026 07 18 22 22 00 05.073 -23 29 14.77 .52528 1.4951 150.2 20.9 .114 98 2026 07 18 23 22 00 04.529 -23 28 48.06 .52516 1.4951 150.3 20.9 .117 98 2026 07 19 00 22 00 03.980 -23 28 21.33 .52503 1.4951 150.3 20.9 .119 98 2026 07 19 01 22 00 03.426 -23 27 54.59 .52491 1.4951 150.3 20.9 .122 98 2026 07 19 02 22 00 02.868 -23 27 27.84 .52478 1.4951 150.4 20.9 .125 98 2026 07 19 03 22 00 02.304 -23 27 01.07 .52466 1.4951 150.4 20.9 .127 98 2026 07 19 04 22 00 01.735 -23 26 34.30 .52454 1.4951 150.5 20.9 .130 98 2026 07 19 05 22 00 01.161 -23 26 07.51 .52441 1.4951 150.5 20.9 .133 98 2026 07 19 06 22 00 00.582 -23 25 40.71 .52429 1.4951 150.5 20.9 .135 98 2026 07 19 07 21 59 59.998 -23 25 13.90 .52417 1.4951 150.6 20.9 .138 98 2026 07 19 08 21 59 59.410 -23 24 47.08 .52404 1.4951 150.6 20.9 .141 98 2026 07 19 09 21 59 58.816 -23 24 20.25 .52392 1.4951 150.7 20.9 .144 98 2026 07 19 10 21 59 58.217 -23 23 53.41 .52380 1.4951 150.7 20.9 .146 98 2026 07 19 11 21 59 57.614 -23 23 26.55 .52368 1.4951 150.7 20.9 .149 98 2026 07 19 12 21 59 57.005 -23 22 59.68 .52355 1.4951 150.8 20.9 .152 98 2026 07 19 13 21 59 56.392 -23 22 32.80 .52343 1.4951 150.8 20.9 .155 98 2026 07 19 14 21 59 55.774 -23 22 05.91 .52331 1.4951 150.9 20.9 .158 98 2026 07 19 15 21 59 55.150 -23 21 39.01 .52319 1.4951 150.9 20.9 .160 98 2026 07 19 16 21 59 54.522 -23 21 12.09 .52307 1.4951 150.9 20.9 .163 98 2026 07 19 17 21 59 53.889 -23 20 45.17 .52295 1.4951 151.0 20.9 .166 98 2026 07 19 18 21 59 53.251 -23 20 18.23 .52283 1.4951 151.0 20.9 .169 98 2026 07 19 19 21 59 52.608 -23 19 51.28 .52271 1.4951 151.1 20.9 .172 98 2026 07 19 20 21 59 51.960 -23 19 24.32 .52259 1.4951 151.1 20.9 .175 98 2026 07 19 21 21 59 51.307 -23 18 57.34 .52247 1.4951 151.1 20.9 .177 98 2026 07 19 22 21 59 50.649 -23 18 30.36 .52235 1.4951 151.2 20.9 .180 98 2026 07 19 23 21 59 49.987 -23 18 03.36 .52223 1.4951 151.2 20.8 .183 98 2026 07 20 00 21 59 49.319 -23 17 36.35 .52211 1.4951 151.2 20.8 .186 98 2026 07 20 01 21 59 48.647 -23 17 09.33 .52199 1.4951 151.3 20.8 .189 98 2026 07 20 02 21 59 47.969 -23 16 42.30 .52187 1.4951 151.3 20.8 .192 98 2026 07 20 03 21 59 47.287 -23 16 15.25 .52175 1.4951 151.4 20.8 .195 98 2026 07 20 04 21 59 46.600 -23 15 48.20 .52163 1.4951 151.4 20.8 .198 98 2026 07 20 05 21 59 45.908 -23 15 21.13 .52152 1.4951 151.4 20.8 .201 98 2026 07 20 06 21 59 45.212 -23 14 54.05 .52140 1.4951 151.5 20.8 .204 98 2026 07 20 07 21 59 44.510 -23 14 26.96 .52128 1.4952 151.5 20.8 .207 98 2026 07 20 08 21 59 43.803 -23 13 59.85 .52116 1.4952 151.6 20.8 .210 98 2026 07 20 09 21 59 43.092 -23 13 32.74 .52105 1.4952 151.6 20.8 .213 98 2026 07 20 10 21 59 42.376 -23 13 05.61 .52093 1.4952 151.6 20.8 .215 98 2026 07 20 11 21 59 41.655 -23 12 38.47 .52081 1.4952 151.7 20.8 .218 98 2026 07 20 12 21 59 40.929 -23 12 11.32 .52070 1.4952 151.7 20.8 .221 98 2026 07 20 13 21 59 40.198 -23 11 44.16 .52058 1.4952 151.8 20.8 .225 98 2026 07 20 14 21 59 39.463 -23 11 16.98 .52046 1.4952 151.8 20.8 .228 98 2026 07 20 15 21 59 38.722 -23 10 49.79 .52035 1.4952 151.8 20.8 .231 98 2026 07 20 16 21 59 37.977 -23 10 22.60 .52023 1.4952 151.9 20.8 .234 98 2026 07 20 17 21 59 37.227 -23 09 55.38 .52012 1.4952 151.9 20.8 .237 98