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
2020-08-08 09:30:57 C 21 54 39.47 +22 57 00.3 V T08
2020-08-08 10:13:13 C 21 54 36.79 +22 56 35.3 V T08
2020-08-08 10:29:17 C 21 54 35.79 +22 56 24.8 V T08
2020-08-10 08:23:16 C 21 51 42.11 +22 27 05.8 V G96
2020-08-10 08:30:40 C 21 51 41.62 +22 27 00.6 V G96
2020-08-10 08:38:04 C 21 51 41.13 +22 26 55.8 V G96
2020-08-10 08:45:29 C 21 51 40.65 +22 26 50.6 V G96
2020-08-10 11:27:08 C 21 51 30.33 +22 25 03.9 V T05
2020-08-10 11:31:13 C 21 51 29.97 +22 25 01.2 V T05
2020-08-10 11:40:27 C 21 51 29.37 +22 24 54.5 V T05
2020-08-10 12:27:25 C 21 51 26.29 +22 24 22.5 V T05
2020-08-11 07:49:07 C 21 50 11.09 +22 11 00.6 V U63
2020-08-11 07:54:22 C 21 50 10.69 +22 10 56.8 V U63
2020-08-11 08:27:48 C 21 50 08.49 +22 10 33.3 V U63
2020-08-11 08:33:04 C 21 50 08.11 +22 10 29.1 V U63
2020-08-12 11:37:03 C 21 48 20.61 +21 51 00.6 V T08
2020-08-12 11:41:42 C 21 48 20.31 +21 50 57.1 V T08
2020-08-12 11:50:50 C 21 48 19.68 +21 50 50.3 V T08
2020-08-12 12:04:54 C 21 48 18.70 +21 50 38.9 V T08
2020-08-16 07:57:25 C 21 41 59.39 +20 36 23.8 V U63
2020-08-16 08:02:41 C 21 41 58.98 +20 36 18.7 V U63
2020-08-16 09:22:51 C 21 41 53.28 +20 35 08.9 V U63
2020-08-16 09:28:06 C 21 41 52.89 +20 35 04.0 V U63
2020-08-18 09:05:17 C 21 38 28.63 +19 51 41.9 V T05
2020-08-18 09:07:55 C 21 38 28.42 +19 51 38.8 V T05
2020-08-18 09:15:23 C 21 38 27.90 +19 51 32.4 V T05
2020-08-18 09:23:28 C 21 38 27.31 +19 51 25.0 V T05
2020-08-21 23:19:29 C 21 32 08.06 +18 24 26.3 V 130
2020-08-21 23:22:20 C 21 32 07.83 +18 24 23.3 V 130
2020-08-21 23:25:45 C 21 32 07.60 +18 24 19.9 V 130
2020-08-22 10:39:01 C 21 31 17.32 +18 12 13.6 V T05
2020-08-22 10:43:37 C 21 31 16.96 +18 12 08.6 V T05
2020-08-22 10:53:11 C 21 31 16.21 +18 11 58.1 V T05
2020-08-22 11:41:28 C 21 31 12.55 +18 11 05.4 V T05
2020-08-22 15:28:41 C 21 30 55.78 +18 06 54.9 q D29
2020-08-22 15:29:57 C 21 30 55.71 +18 06 53.5 q D29
2020-08-22 15:31:14 C 21 30 55.61 +18 06 52.1 q D29
2020-08-22 15:32:30 C 21 30 55.51 +18 06 51.0 q D29
2020-08-22 15:33:46 C 21 30 55.40 +18 06 49.4 q D29
2020-08-22 15:35:02 C 21 30 55.30 +18 06 48.2 q D29
2020-08-24 08:50:01 C 21 27 49.78 +17 20 17.1 V T08
2020-08-24 08:53:21 C 21 27 49.44 +17 20 12.6 V T08
2020-08-24 08:58:00 C 21 27 49.11 +17 20 07.5 V T08
2020-08-24 09:13:42 C 21 27 47.91 +17 19 49.5 V T08
2020-08-27 04:23:39 C 21 22 43.95 +15 58 47.3 V G96
2020-08-27 04:31:52 C 21 22 43.31 +15 58 37.0 V G96
2020-08-27 04:40:04 C 21 22 42.67 +15 58 26.7 V G96
2020-08-27 04:48:18 C 21 22 42.05 +15 58 16.5 V G96
2020-08-28 09:34:07 C 21 20 31.51 +15 21 42.7 V T08
2020-08-28 09:49:37 C 21 20 30.32 +15 21 22.7 V T08
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)