12538 (1998 OH)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4059016556 ± 4.35e-09
Semi-major axis (a)1.5415724184 AU ± 7.25e-10
Inclination (i)24.53563599° ± 8.41e-07
Long. of Asc. Node (Ω)220.68792372° ± 1.75e-06
Arg. of Perihelion (ω)321.78911043° ± 1.84e-06
Mean Anomaly (M)163.00612547° ± 9.55e-07
Mean Motion (n)0.5149515611°/day ± 3.63e-10
Perihelion dist (q)0.91584562 AU ± 6.72e-09
Aphelion dist (Q)2.16729922 AU ± 6.78e-09
Orbital Period1.91401747 yr ± 1.35e-09
Physical Parameters
H (abs. magnitude)15.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.272″
Uncertainty0
Orbit TypeApollo
MOID0.029256 AU
Observations Used10512
Radar Obs Used1
Gaia Obs Used113
Oppositions14
Arc Total1987-2025
First Observation Used1987-08-22
Last Observation Used2025-12-01
Observations (19002)
Date Type RA Dec Mag Band Observatory
2024-11-02 14:52:27 C 10 10 45.331 -12 02 56.51 V T05
2024-11-02 14:53:06 C 10 10 45.442 -12 02 57.05 V T05
2024-11-02 15:06:56 C 10 10 47.731 -12 03 15.48 V T05
2024-11-02 15:07:35 C 10 10 47.854 -12 03 16.27 V T05
2024-11-02 15:15:25 C 10 10 49.145 -12 03 26.82 V T05
2024-11-02 15:25:45 C 10 10 50.837 -12 03 41.22 V T05
2024-11-02 15:27:43 C 10 10 51.144 -12 03 43.60 V T05
2024-11-02 15:35:33 C 10 10 52.546 -12 03 52.81 V T05
2024-11-07 07:52:00 C 10 29 56.611 -14 34 25.00 V W68
2024-11-07 07:56:40 C 10 29 57.401 -14 34 31.84 V W68
2024-11-07 08:05:19 C 10 29 58.930 -14 34 43.07 V W68
2024-11-07 08:19:57 C 10 30 01.435 -14 35 02.76 V W68
2024-11-08 07:42:12 C 10 34 05.064 -15 06 14.47 V W68
2024-11-08 07:46:54 C 10 34 05.921 -15 06 20.20 V W68
2024-11-08 07:56:08 C 10 34 07.526 -15 06 32.90 V W68
2024-11-08 08:15:56 C 10 34 10.949 -15 06 59.29 V W68
2024-11-09 12:11:26 C 10 39 04.561 -15 44 15.36 V 703
2024-11-09 12:15:57 C 10 39 05.317 -15 44 21.01 V 703
2024-11-09 12:19:46 C 10 39 05.998 -15 44 27.24 V 703
2024-11-09 12:24:24 C 10 39 06.700 -15 44 32.53 V 703
2024-11-10 14:24:45 C 10 43 42.977 -16 18 55.58 V T05
2024-11-10 14:29:18 C 10 43 43.812 -16 19 02.39 V T05
2024-11-10 14:47:37 C 10 43 47.042 -16 19 26.94 V T05
2024-11-10 15:07:48 C 10 43 50.580 -16 19 53.36 V T05
2024-11-15 08:05:26 C 11 04 19.063 -18 46 41.12 V W68
2024-11-15 08:13:34 C 11 04 20.573 -18 46 51.20 V W68
2024-11-15 08:18:50 C 11 04 21.528 -18 46 58.40 V W68
2024-11-15 08:33:07 C 11 04 24.134 -18 47 16.01 V W68
2024-11-19 07:58:55 C 11 22 19.819 -20 46 47.60 V W68
2024-11-19 08:16:03 C 11 22 23.028 -20 47 08.45 V W68
2024-11-19 08:21:58 C 11 22 24.161 -20 47 15.90 V W68
2024-11-19 08:29:58 C 11 22 25.675 -20 47 25.73 V W68
2024-11-20 07:55:02 C 11 26 55.030 -21 15 54.50 V W68
2024-11-20 08:12:46 C 11 26 58.471 -21 16 16.61 V W68
2024-11-20 08:20:44 C 11 26 59.988 -21 16 26.65 V W68
2024-11-20 08:28:44 C 11 27 01.510 -21 16 35.94 V W68
2024-11-25 01:40:05 C 11 49 13.092 -23 28 37.63 V M22
2024-11-25 01:48:02 C 11 49 14.710 -23 28 47.21 V M22
2024-11-25 02:14:21 C 11 49 19.870 -23 29 15.94 V M22
2024-11-25 02:19:41 C 11 49 20.998 -23 29 23.10 V M22
2024-11-30 01:18:35 C 12 13 32.249 -25 35 58.27 V M22
2024-11-30 01:23:14 C 12 13 33.199 -25 36 02.95 V M22
2024-11-30 01:47:35 C 12 13 38.206 -25 36 27.68 V M22
2024-11-30 02:06:09 C 12 13 42.055 -25 36 46.62 V M22
2024-12-08 01:42:31 C 12 54 19.306 -28 27 38.77 V M22
2024-12-08 01:48:24 C 12 54 20.597 -28 27 43.34 V M22
2024-12-08 01:57:33 C 12 54 22.582 -28 27 50.11 V M22
2024-12-08 02:09:22 C 12 54 25.118 -28 27 59.40 V M22
2024-12-09 07:47:29 C 13 00 51.696 -28 50 16.48 V W68
2024-12-09 07:55:00 C 13 00 53.309 -28 50 22.20 V W68
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2019-05-14 21:19:00 24772.1678 4 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)