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
2016-05-04 05:36:04 C 10 34 09.70 +56 37 08.9 q H45
2016-05-04 07:22:54 C 10 34 24.69 +56 36 29.9 L T05
2016-05-04 07:26:23 C 10 34 25.29 +56 36 28.0 L T05
2016-05-04 07:41:04 C 10 34 27.14 +56 36 22.2 L T05
2016-05-04 08:04:50 C 10 34 30.12 +56 36 12.4 L T05
2016-05-06 03:12:25 C 10 40 15.54 +56 18 13.8 q H45
2016-05-06 03:14:03 C 10 40 15.73 +56 18 13.4 q H45
2016-05-06 03:15:31 C 10 40 15.94 +56 18 12.7 q H45
2016-05-06 03:16:57 C 10 40 16.10 +56 18 12.2 q H45
2016-05-06 03:19:42 C 10 40 16.46 +56 18 10.9 q H45
2016-05-06 03:21:25 C 10 40 16.67 +56 18 10.2 q H45
2016-05-08 05:14:48 C 10 46 39.41 +55 56 15.2 q 703
2016-05-08 05:21:33 C 10 46 40.23 +55 56 12.0 q 703
2016-05-08 05:28:16 C 10 46 41.02 +55 56 09.0 q 703
2016-05-08 05:35:00 C 10 46 41.90 +55 56 05.5 q 703
2016-05-13 03:19:22 C 11 00 45.99 +55 00 17.5 q H45
2016-05-13 03:21:08 C 11 00 46.17 +55 00 16.2 q H45
2016-05-13 03:22:47 C 11 00 46.37 +55 00 15.9 q H45
2016-05-13 03:24:30 C 11 00 46.56 +55 00 14.9 q H45
2016-05-13 03:26:08 C 11 00 46.76 +55 00 14.6 q H45
2016-05-13 03:28:48 C 11 00 47.14 +55 00 13.0 q H45
2016-05-15 06:07:39 C 11 06 28.234 +54 34 47.03 L F51
2016-05-15 06:45:49 C 11 06 32.299 +54 34 27.44 L F51
2016-05-15 07:04:55 C 11 06 34.343 +54 34 17.62 L F51
2016-05-16 12:23:29 C 11 09 46.26 +54 19 10.8 q D29
2016-05-16 12:46:58 C 11 09 48.65 +54 18 59.6 q D29
2016-05-16 13:10:27 C 11 09 51.27 +54 18 47.2 q D29
2016-06-02 04:31:22 C 11 48 37.09 +50 34 38.3 q 703
2016-06-02 04:38:53 C 11 48 37.62 +50 34 32.7 q 703
2016-06-02 04:46:24 C 11 48 38.28 +50 34 28.5 q 703
2016-06-02 04:53:55 C 11 48 38.88 +50 34 24.2 q 703
2016-06-17 02:52:42 C 12 18 43.57 +46 55 12.8 q H21
2016-06-17 03:04:13 C 12 18 44.51 +46 55 05.1 q H21
2016-06-17 03:15:36 C 12 18 45.40 +46 54 57.9 q H21
2016-06-18 04:32:59 C 12 20 46.62 +46 39 06.0 q H21
2016-06-18 04:44:04 C 12 20 47.48 +46 39 00.5 q H21
2016-06-18 04:55:06 C 12 20 48.43 +46 38 52.3 q H21
2017-09-01 07:17:31 C 18 42 00.464 +26 23 34.15 L F51
2017-09-01 07:33:59 C 18 42 00.216 +26 23 20.47 L F51
2017-09-01 07:50:28 C 18 41 59.958 +26 23 06.71 L F51
2017-09-01 08:06:54 C 18 41 59.691 +26 22 52.98 L F51
2017-09-15 01:36:56 C 18 39 55.90 +21 46 37.7 U H21
2017-09-15 01:50:56 C 18 39 55.94 +21 46 26.2 U H21
2019-03-25 02:17:58 C 18 25 23.65 +32 26 42.7 V C95
2019-03-25 03:36:45 C 18 25 25.83 +32 27 45.8 V C95
2019-05-06 11:01:59 C 18 25 37.10 +44 42 59.1 V G96
2019-05-06 11:08:07 C 18 25 37.03 +44 43 03.6 V G96
2019-05-06 11:14:02 C 18 25 36.76 +44 43 06.9 V G96
2019-05-06 11:19:30 C 18 25 36.56 +44 43 09.7 V G96
2019-05-06 13:06:38 C 18 25 33.246 +44 44 12.79 U F51
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)