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
2020-09-29 07:59:03 C 20 34 52.13 -04 41 16.9 V T05
2020-09-29 08:10:19 C 20 34 51.77 -04 41 34.9 V T05
2020-09-29 08:50:55 C 20 34 50.30 -04 42 39.9 V T05
2020-10-06 02:37:22 C 20 30 35.49 -08 51 32.2 V 703
2020-10-06 02:46:06 C 20 30 35.33 -08 51 43.5 V 703
2020-10-06 02:54:49 C 20 30 35.13 -08 51 58.0 V 703
2020-10-06 03:03:33 C 20 30 34.95 -08 52 11.5 V 703
2020-10-07 09:33:24 C 20 30 01.72 -09 36 52.6 q E89
2020-10-07 10:09:41 C 20 30 01.05 -09 37 45.5 q E89
2020-10-08 06:17:51 C 20 29 42.09 -10 07 08.0 V T05
2020-10-08 06:19:10 C 20 29 42.03 -10 07 10.3 V T05
2020-10-08 06:32:30 C 20 29 41.82 -10 07 29.4 V T05
2020-10-08 06:33:50 C 20 29 41.83 -10 07 31.6 V T05
2020-10-08 06:37:51 C 20 29 41.74 -10 07 37.0 V T05
2020-10-08 06:39:10 C 20 29 41.69 -10 07 38.9 V T05
2020-10-08 06:49:10 C 20 29 41.54 -10 07 52.9 V T05
2020-10-08 06:51:49 C 20 29 41.49 -10 07 57.0 V T05
2020-10-09 02:02:04 C 20 29 25.42 -10 35 30.2 V G96
2020-10-09 02:10:10 C 20 29 25.30 -10 35 41.8 V G96
2020-10-09 02:18:16 C 20 29 25.17 -10 35 53.4 V G96
2020-10-09 02:26:23 C 20 29 25.05 -10 36 04.9 V G96
2020-10-10 02:33:15 C 20 29 07.25 -11 10 17.3 V G96
2020-10-10 02:40:35 C 20 29 07.14 -11 10 27.7 V G96
2020-10-10 02:47:55 C 20 29 07.05 -11 10 38.0 V G96
2020-10-10 02:55:14 C 20 29 06.95 -11 10 48.3 V G96
2020-10-14 07:08:02 C 20 28 24.38 -13 27 54.0 V T08
2020-10-14 07:14:01 C 20 28 24.35 -13 28 02.6 V T08
2020-10-14 07:21:58 C 20 28 24.33 -13 28 12.3 V T08
2020-10-14 07:41:13 C 20 28 24.21 -13 28 38.1 V T08
2020-10-15 01:54:03 C 20 28 22.34 -13 52 41.5 V 703
2020-10-15 02:02:46 C 20 28 22.29 -13 52 53.7 V 703
2020-10-15 02:11:30 C 20 28 22.22 -13 53 04.8 V 703
2020-10-15 02:20:14 C 20 28 22.18 -13 53 17.8 V 703
2020-10-16 05:18:06 C 20 28 21.926 -14 28 19.76 U F51
2020-10-16 05:36:25 C 20 28 21.904 -14 28 43.38 U F51
2020-10-16 05:54:45 C 20 28 21.882 -14 29 06.98 U F51
2020-10-16 06:13:04 C 20 28 21.859 -14 29 30.56 U F51
2020-10-16 07:15:29 C 20 28 21.78 -14 30 51.4 V T05
2020-10-16 07:20:06 C 20 28 21.81 -14 30 56.7 V T05
2020-10-16 07:28:01 C 20 28 21.75 -14 31 06.6 V T05
2020-10-16 07:49:11 C 20 28 21.78 -14 31 33.5 V T05
2020-10-19 02:34:45 C 20 28 37.16 -15 55 43.5 V W33
2020-10-19 02:37:37 C 20 28 37.18 -15 55 47.9 V W33
2020-10-19 02:40:28 C 20 28 37.21 -15 55 51.1 V W33
2020-10-20 02:42:32 C 20 28 48.18 -16 25 15.1 V G96
2020-10-20 02:50:37 C 20 28 48.24 -16 25 25.0 V G96
2020-10-20 02:58:40 C 20 28 48.29 -16 25 34.7 V G96
2020-10-20 03:06:44 C 20 28 48.34 -16 25 44.5 V G96
2020-11-08 05:33:09 C 20 40 23.28 -24 23 50.7 V T05
2020-11-08 05:39:05 C 20 40 23.49 -24 23 55.5 V T05
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)