23187 (2000 PN9)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5893652209 ± 4.57e-09
Semi-major axis (a)1.8469477145 AU ± 3.08e-10
Inclination (i)51.33590425° ± 2.99e-06
Long. of Asc. Node (Ω)164.28086830° ± 2.07e-07
Arg. of Perihelion (ω)293.54110100° ± 1.16e-06
Mean Anomaly (M)324.53859175° ± 7.01e-07
Mean Motion (n)0.3926723979°/day ± 9.83e-11
Perihelion dist (q)0.75842097 AU ± 8.45e-09
Aphelion dist (Q)2.93547446 AU ± 8.46e-09
Orbital Period2.51004728 yr ± 6.28e-10
Physical Parameters
H (abs. magnitude)16.05
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.292″
Uncertainty0
Orbit TypeApollo
MOID0.014129 AU
Observations Used2223
Radar Obs Used8
Gaia Obs Used118
Oppositions16
Arc Total1990-2025
First Observation Used1990-08-02
Last Observation Used2025-11-12
Observations (2307)
Date Type RA Dec Mag Band Observatory
2005-08-31 22:19:35 C 21 51 13.80 +09 52 37.7 r 084
2005-08-31 22:23:43 C 21 51 13.45 +09 52 30.8 r 084
2005-09-01 00:29:32 C 21 51 02.68 +09 49 01.4 r A13
2005-09-01 00:31:39 C 21 51 02.49 +09 48 57.4 r A13
2005-09-01 00:44:38 C 21 51 01.39 +09 48 36.0 r A13
2005-09-01 00:46:48 C 21 51 01.21 +09 48 32.4 r A13
2005-09-01 09:23:19 C 21 50 17.96 +09 34 10.9 o 608
2005-09-01 09:38:45 C 21 50 16.61 +09 33 44.7 o 608
2005-09-01 09:54:16 C 21 50 15.26 +09 33 19.1 o 608
2005-09-01 21:05:34 C 21 49 18.54 +09 14 14.2 r 084
2005-09-01 21:09:42 C 21 49 18.18 +09 14 07.4 r 084
2005-09-02 03:37:04 C 21 48 45.45 +09 03 06.9 r 932
2005-09-02 03:42:38 C 21 48 44.97 +09 02 57.4 r 932
2005-09-02 03:46:20 C 21 48 44.65 +09 02 51.1 r 932
2005-09-03 21:56:15 C 21 45 09.29 +07 48 53.5 r 084
2005-09-03 22:00:24 C 21 45 08.93 +07 48 45.9 r 084
2005-09-04 21:10:31 C 21 43 10.29 +07 06 54.5 r 084
2005-09-04 21:14:39 C 21 43 09.93 +07 06 47.4 r 084
2005-09-04 21:24:08 C 21 43 09.21 +07 06 32.6 c A41
2005-09-04 22:02:22 C 21 43 05.88 +07 05 22.9 c A41
2005-09-04 22:40:33 C 21 43 02.52 +07 04 12.5 c A41
2005-09-05 22:30:26 C 21 41 00.34 +06 20 12.5 r J94
2005-09-05 22:55:52 C 21 40 58.17 +06 19 25.9 r J94
2005-09-05 23:17:42 C 21 40 56.26 +06 18 45.1 r J94
2005-09-05 23:21:46 C 21 40 55.73 +06 18 35.6 r 084
2005-09-06 09:29:56 C 21 40 03.90 +05 59 43.8 o 608
2005-09-06 09:44:39 C 21 40 02.58 +05 59 16.0 o 608
2005-09-06 10:00:26 C 21 40 01.20 +05 58 46.6 o 608
2005-09-06 19:40:45 C 21 39 12.04 +05 40 27.7 r A30
2005-09-06 19:42:04 C 21 39 11.92 +05 40 25.1 r A30
2005-09-06 19:43:26 C 21 39 11.81 +05 40 22.6 r A30
2005-09-06 19:44:23 C 21 39 11.72 +05 40 20.7 r A30
2005-09-06 19:45:36 C 21 39 11.61 +05 40 18.3 r A30
2005-09-06 19:46:50 C 21 39 11.51 +05 40 16.0 r A30
2005-09-09 05:30:39 C 21 34 16.15 +03 48 48.7 17.6 c 704
2005-09-09 05:46:47 C 21 34 14.75 +03 48 16.2 17.8 c 704
2005-09-09 06:02:54 C 21 34 13.36 +03 47 45.3 17.5 c 704
2005-09-09 06:19:19 C 21 34 11.89 +03 47 12.3 17.6 c 704
2005-09-09 06:35:27 C 21 34 10.51 +03 46 40.8 17.8 c 704
2005-09-09 21:09:07 C 21 32 56.60 +03 17 50.9 r 084
2005-09-10 20:57:10 C 21 30 56.22 +02 30 19.0 r 084
2005-09-10 21:01:18 C 21 30 55.91 +02 30 11.1 r 084
2005-09-11 03:16:10 C 21 30 24.83 +02 17 39.6 c 699
2005-09-11 03:47:45 C 21 30 22.14 +02 16 35.9 c 699
2005-09-11 04:19:19 C 21 30 19.36 +02 15 32.9 c 699
2005-09-11 04:50:56 C 21 30 16.63 +02 14 28.5 c 699
2005-09-13 20:25:31 C 21 25 00.54 +00 04 28.9 r 084
2005-09-13 20:29:39 C 21 25 00.15 +00 04 20.5 r 084
2005-09-13 20:42:02 C 21 24 59.28 +00 03 57.2 c A53
2005-09-13 20:51:34 C 21 24 58.54 +00 03 37.7 c A53
Radar Observations (8)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2001-03-03 09:45:00 -89603 3 Hz 2380 -1 -1
2001-03-03 11:20:00 62195926.9 10 us 8560 -14 -14
2001-03-03 11:20:00 -345113.8 5 Hz 8560 -14 -14
2001-03-04 10:29:00 67714671.08 2 us 2380 -1 -1
2001-03-05 10:04:00 76798876 2 us 2380 -1 -1
2006-03-07 17:10:00 34277451 20 us 8560 -14 -14
2006-03-07 19:00:00 35392186 3 us 8560 -14 -14
2006-03-07 20:10:00 36111353.6 1 us 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)