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
2015-08-27 21:08:25 C 21 34 44.61 +14 58 34.4 q 160
2015-08-27 21:11:22 C 21 34 44.37 +14 58 30.6 q 160
2015-08-27 21:14:20 C 21 34 44.17 +14 58 26.8 q 160
2015-08-29 20:49:56 C 21 31 01.22 +13 54 21.8 q 160
2015-08-29 20:52:34 C 21 31 01.03 +13 54 18.5 q 160
2015-08-29 20:55:11 C 21 31 00.79 +13 54 14.9 q 160
2015-08-31 21:07:12 C 21 27 14.38 +12 45 58.6 q 160
2015-08-31 21:10:12 C 21 27 14.15 +12 45 54.1 q 160
2015-08-31 21:13:13 C 21 27 13.90 +12 45 49.9 q 160
2015-09-02 01:35:50 C 21 25 00.97 +12 04 07.9 q I15
2015-09-02 01:39:04 C 21 25 00.68 +12 04 02.6 q I15
2015-09-02 01:42:18 C 21 25 00.44 +12 03 57.9 q I15
2015-09-04 04:03:19 C 21 21 05.55 +10 47 23.5 t U78
2015-09-04 04:16:01 C 21 21 04.62 +10 47 04.0 t U78
2015-09-04 04:22:05 C 21 21 04.06 +10 46 55.1 t U78
2015-09-04 04:28:04 C 21 21 03.57 +10 46 44.8 t U78
2015-09-06 21:21:43 C 21 16 04.69 +09 03 30.5 q 160
2015-09-06 21:26:57 C 21 16 04.31 +09 03 20.9 q 160
2015-09-06 21:30:51 C 21 16 04.02 +09 03 14.9 q 160
2015-09-07 20:28:24 C 21 14 19.99 +08 25 38.2 q 160
2015-09-07 20:31:41 C 21 14 19.75 +08 25 32.9 q 160
2015-09-07 20:34:28 C 21 14 19.51 +08 25 28.7 q 160
2015-09-08 12:56:13 C 21 13 06.04 +07 58 22.8 q D29
2015-09-08 13:14:00 C 21 13 04.68 +07 57 53.0 q D29
2015-09-08 13:31:47 C 21 13 03.32 +07 57 23.8 q D29
2015-09-08 20:33:45 C 21 12 31.89 +07 45 37.4 c A24
2015-09-08 20:34:47 C 21 12 31.74 +07 45 37.2 c A24
2015-09-08 20:35:50 C 21 12 31.76 +07 45 35.5 c A24
2015-09-08 20:36:52 C 21 12 31.65 +07 45 31.3 c A24
2015-09-08 21:36:16 C 21 12 27.15 +07 43 53.1 c A24
2015-09-08 21:37:18 C 21 12 27.11 +07 43 51.8 c A24
2015-09-08 21:39:23 C 21 12 26.88 +07 43 48.7 c A24
2015-09-09 20:53:29 C 21 10 43.92 +07 04 42.6 q 160
2015-09-09 20:56:28 C 21 10 43.69 +07 04 37.1 q 160
2015-09-09 20:59:25 C 21 10 43.48 +07 04 32.2 q 160
2015-09-10 12:38:05 C 21 09 34.98 +06 37 59.1 q D29
2015-09-10 12:58:24 C 21 09 33.45 +06 37 24.2 q D29
2015-09-10 13:18:43 C 21 09 31.92 +06 36 50.0 q D29
2015-09-11 06:07:51 C 21 08 18.54 +06 08 01.5 q H45
2015-09-11 06:09:02 C 21 08 18.50 +06 08 00.1 q H45
2015-09-11 20:44:58 C 21 07 15.97 +05 42 49.8 q 160
2015-09-11 20:47:43 C 21 07 15.77 +05 42 44.9 q 160
2015-09-11 20:50:17 C 21 07 15.57 +05 42 40.5 q 160
2015-09-12 21:04:45 C 21 05 32.79 +05 00 37.8 18.4 u J43
2015-09-12 21:23:45 C 21 05 31.45 +05 00 05.2 18.4 u J43
2015-09-12 21:42:39 C 21 05 30.09 +04 59 32.5 18.0 u J43
2015-09-12 22:01:31 C 21 05 28.72 +04 58 59.2 18.1 u J43
2015-09-15 04:11:20 C 21 01 45.79 +03 23 50.4 R G45
2015-09-15 04:19:17 C 21 01 45.25 +03 23 36.2 R G45
2015-09-15 04:26:39 C 21 01 44.74 +03 23 22.9 R G45
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)