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
2021-05-20 05:56:03 C 10 48 45.70 +51 22 05.3 U I41
2021-05-22 07:32:56 C 10 55 02.196 +51 01 44.41 U F51
2021-05-22 07:50:38 C 10 55 04.351 +51 01 36.69 U F51
2021-05-22 08:08:20 C 10 55 06.507 +51 01 28.96 U F51
2021-05-24 06:05:19 C 11 00 44.07 +50 41 38.5 V 703
2021-05-24 06:14:25 C 11 00 45.01 +50 41 34.3 V 703
2021-05-24 06:23:32 C 11 00 46.16 +50 41 30.0 V 703
2021-05-24 06:32:40 C 11 00 47.34 +50 41 25.9 V 703
2021-05-24 06:36:44 C 11 00 48.05 +50 41 27.8 V T08
2021-05-24 07:05:19 C 11 00 51.42 +50 41 14.8 V T08
2021-05-24 07:13:58 C 11 00 52.54 +50 41 11.2 V T08
2021-05-24 07:23:17 C 11 00 53.57 +50 41 07.3 V T08
2021-05-24 07:37:58 C 11 00 55.30 +50 41 00.5 V T08
2021-05-28 07:58:51 C 11 12 11.92 +49 56 56.3 V T08
2021-05-28 08:03:32 C 11 12 12.58 +49 56 55.4 V T08
2021-05-28 08:11:37 C 11 12 13.36 +49 56 51.2 V T08
2021-05-28 08:26:18 C 11 12 15.06 +49 56 43.2 V T08
2021-05-29 05:01:00 C 11 14 34.76 +49 46 55.2 V 703
2021-05-29 05:08:45 C 11 14 35.64 +49 46 50.0 V 703
2021-05-29 05:16:29 C 11 14 36.49 +49 46 47.3 V 703
2021-05-29 05:24:14 C 11 14 37.19 +49 46 42.1 V 703
2021-06-01 05:06:24 C 11 22 31.56 +49 11 35.4 V 703
2021-06-01 05:21:50 C 11 22 33.09 +49 11 28.0 V 703
2021-06-01 05:29:32 C 11 22 33.95 +49 11 24.4 V 703
2021-06-02 04:48:27 C 11 25 04.47 +48 59 41.6 U I41
2021-06-02 05:13:23 C 11 25 07.06 +48 59 28.8 U I41
2021-06-02 05:14:43 C 11 25 07.21 +48 59 28.0 U I41
2021-06-02 06:09:44 C 11 25 13.01 +48 58 59.4 U I41
2021-06-02 06:12:29 C 11 25 13.28 +48 58 58.1 U I41
2021-06-02 06:13:50 C 11 25 13.43 +48 58 57.3 U I41
2021-06-02 07:47:54 C 11 25 23.37 +48 58 08.4 U I41
2021-06-02 07:49:15 C 11 25 23.53 +48 58 07.7 U I41
2021-06-03 06:31:22 C 11 27 48.39 +48 46 38.4 V T05
2021-06-03 06:42:45 C 11 27 49.60 +48 46 32.8 V T05
2021-06-03 06:45:25 C 11 27 49.86 +48 46 31.1 V T05
2021-06-03 06:49:33 C 11 27 50.31 +48 46 29.4 V T05
2021-06-03 07:14:10 C 11 27 52.82 +48 46 16.5 V T05
2021-06-05 06:40:53 C 11 32 49.89 +48 21 44.4 V T08
2021-06-05 06:44:52 C 11 32 50.33 +48 21 42.8 V T08
2021-06-05 06:53:31 C 11 32 51.28 +48 21 36.5 V T08
2021-06-05 07:10:59 C 11 32 52.90 +48 21 28.0 V T08
2021-06-08 05:33:51 C 11 40 01.82 +47 44 09.6 V 703
2021-06-08 05:41:34 C 11 40 02.60 +47 44 05.7 V 703
2021-06-08 05:57:00 C 11 40 04.30 +47 43 56.2 V 703
2021-06-09 06:36:42 C 11 42 31.78 +47 30 42.2 V T08
2021-06-09 06:41:20 C 11 42 32.26 +47 30 38.3 V T08
2021-06-09 06:50:39 C 11 42 33.07 +47 30 35.1 V T08
2021-06-09 07:05:17 C 11 42 34.37 +47 30 26.7 V T08
2021-06-12 04:49:37 C 11 49 23.24 +46 52 15.7 V 703
2021-06-12 04:58:04 C 11 49 24.06 +46 52 10.7 V 703
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)