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
2001-05-20 21:12:25 C 12 33 31.91 +57 03 28.1 621
2001-05-20 21:15:46 C 12 33 31.99 +57 03 25.6 621
2001-05-21 21:23:41 C 12 34 20.39 +56 46 53.6 621
2001-05-21 21:26:00 C 12 34 20.50 +56 46 52.0 621
2001-05-21 21:28:20 C 12 34 20.53 +56 46 51.0 621
2001-05-21 21:30:40 C 12 34 20.65 +56 46 48.8 621
2001-05-21 21:32:59 C 12 34 20.70 +56 46 47.1 621
2002-06-04 09:26:05 C 20 26 35.11 +35 06 52.0 c 649
2002-06-04 09:40:47 C 20 26 34.81 +35 06 56.5 c 649
2002-06-06 08:26:26 C 20 25 33.20 +35 23 22.3 c 649
2002-06-06 09:04:24 C 20 25 32.35 +35 23 35.3 c 649
2004-08-12 21:46:10 C 16 58 32.99 +36 06 34.0 r 941
2004-08-12 21:49:27 C 16 58 32.99 +36 06 31.5 r 941
2004-08-12 21:52:44 C 16 58 32.98 +36 06 28.7 r 941
2004-08-12 21:57:40 C 16 58 32.97 +36 06 24.7 r 941
2004-08-12 22:02:34 C 16 58 32.96 +36 06 20.4 r 941
2004-08-12 22:12:25 C 16 58 32.96 +36 06 13.5 r 941
2005-08-04 23:42:35 C 22 34 52.47 +21 21 44.4 r 170
2005-08-04 23:44:11 C 22 34 52.39 +21 21 43.6 r 170
2005-08-04 23:45:48 C 22 34 52.32 +21 21 42.7 r 170
2005-08-13 10:49:28 C 22 24 07.50 +19 04 44.0 o 608
2005-08-13 11:05:02 C 22 24 06.52 +19 04 30.8 o 608
2005-08-13 11:20:50 C 22 24 05.52 +19 04 17.3 o 608
2005-08-22 23:31:29 C 22 08 30.05 +15 06 46.8 r 084
2005-08-23 21:28:36 C 22 06 50.03 +14 38 46.9 r 084
2005-08-24 21:40:37 C 22 04 57.77 +14 06 49.0 r 084
2005-08-24 21:45:45 C 22 04 57.38 +14 06 42.0 r 084
2005-08-27 04:10:11 C 22 00 39.20 +12 50 42.7 c 699
2005-08-27 04:42:28 C 22 00 36.57 +12 49 55.5 c 699
2005-08-27 05:12:26 C 22 00 34.15 +12 49 11.8 c 699
2005-08-29 07:10:40 C 21 56 29.61 +11 34 11.9 o 644
2005-08-29 07:42:03 C 21 56 26.95 +11 33 23.3 o 644
2005-08-29 08:12:13 C 21 56 24.39 +11 32 36.5 o 644
2005-08-29 20:54:11 C 21 55 21.78 +11 12 42.7 r A13
2005-08-29 20:58:56 C 21 55 21.38 +11 12 35.5 r A13
2005-08-29 21:21:56 C 21 55 19.44 +11 11 59.2 r A13
2005-08-29 21:43:49 C 21 55 17.58 +11 11 24.8 r A13
2005-08-29 21:47:20 C 21 55 17.29 +11 11 18.9 r A13
2005-08-30 19:44:09 C 21 53 27.94 +10 36 16.3 r A13
2005-08-30 19:45:21 C 21 53 27.90 +10 36 14.4 r 185
2005-08-30 19:50:38 C 21 53 27.46 +10 36 05.9 r 185
2005-08-30 19:55:11 C 21 53 27.05 +10 35 59.0 r 185
2005-08-30 20:02:21 C 21 53 26.45 +10 35 47.6 r 185
2005-08-30 20:04:46 C 21 53 26.21 +10 35 42.9 r A13
2005-08-30 20:08:57 C 21 53 25.86 +10 35 37.8 c A48
2005-08-30 20:11:37 C 21 53 25.62 +10 35 33.5 c A48
2005-08-30 20:14:18 C 21 53 25.39 +10 35 28.9 c A48
2005-08-30 20:16:28 C 21 53 25.23 +10 35 25.7 c A48
2005-08-30 20:19:40 C 21 53 24.95 +10 35 20.5 c A48
2005-08-30 20:22:22 C 21 53 24.69 +10 35 14.6 r A13
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)