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
2022-12-02 01:01:12 C 10 11 52.111 -27 37 21.97 V M22
2022-12-03 01:21:31 C 10 16 05.374 -28 24 32.29 V M22
2022-12-03 01:26:08 C 10 16 06.187 -28 24 41.18 V M22
2022-12-03 02:01:15 C 10 16 12.214 -28 25 49.33 V M22
2022-12-03 02:05:47 C 10 16 12.989 -28 25 58.12 V M22
2022-12-04 06:58:03 C 10 21 19.296 -29 21 38.81 V W68
2022-12-04 07:04:00 C 10 21 20.333 -29 21 50.47 V W68
2022-12-04 07:23:51 C 10 21 23.844 -29 22 28.60 V W68
2022-12-04 07:31:44 C 10 21 25.224 -29 22 44.22 V W68
2022-12-05 07:38:02 C 10 25 45.547 -30 08 57.91 V W68
2022-12-05 07:42:34 C 10 25 46.370 -30 09 06.59 V W68
2022-12-05 07:50:22 C 10 25 47.762 -30 09 21.56 V W68
2022-12-06 01:41:35 C 10 29 03.449 -30 43 25.03 V M22
2022-12-06 01:47:25 C 10 29 04.493 -30 43 36.05 V M22
2022-12-06 01:55:14 C 10 29 05.916 -30 43 51.17 V M22
2022-12-06 02:04:53 C 10 29 07.668 -30 44 09.38 V M22
2022-12-07 00:27:49 C 10 33 16.788 -31 26 34.44 V M22
2022-12-07 00:32:25 C 10 33 17.674 -31 26 43.26 V M22
2022-12-07 01:02:17 C 10 33 23.167 -31 27 40.39 V M22
2022-12-07 01:10:44 C 10 33 24.734 -31 27 56.52 V M22
2022-12-09 06:57:39 C 10 43 39.655 -33 08 33.22 V W68
2022-12-09 07:25:10 C 10 43 44.959 -33 09 24.30 V W68
2022-12-09 07:33:00 C 10 43 46.452 -33 09 39.13 V W68
2022-12-10 00:45:07 C 10 47 08.383 -33 41 19.86 V M22
2022-12-10 00:49:40 C 10 47 09.274 -33 41 28.50 V M22
2022-12-10 00:59:17 C 10 47 11.141 -33 41 46.43 V M22
2022-12-10 01:14:28 C 10 47 14.110 -33 42 14.65 V M22
2022-12-13 07:50:01 C 11 03 09.533 -36 03 32.62 V W68
2022-12-13 07:54:33 C 11 03 10.428 -36 03 40.72 V W68
2022-12-13 08:21:08 C 11 03 15.922 -36 04 27.77 V W68
2022-12-13 08:29:47 C 11 03 17.674 -36 04 43.10 V W68
2022-12-14 01:30:51 C 11 06 52.178 -36 34 24.17 V M22
2022-12-14 01:50:32 C 11 06 56.290 -36 34 58.66 V M22
2022-12-14 01:55:05 C 11 06 57.240 -36 35 06.61 V M22
2022-12-14 02:05:34 C 11 06 59.422 -36 35 25.01 V M22
2022-12-19 06:48:52 C 11 34 35.338 -40 01 08.90 V W68
2022-12-19 06:53:29 C 11 34 36.386 -40 01 16.00 V W68
2022-12-19 07:03:24 C 11 34 38.657 -40 01 31.66 V W68
2022-12-19 07:13:14 C 11 34 40.910 -40 01 47.35 V W68
2022-12-27 04:48:30 C 12 21 29.748 -44 22 23.27 V W68
2022-12-27 04:53:06 C 12 21 30.938 -44 22 29.03 V W68
2022-12-27 05:43:18 C 12 21 44.069 -44 23 29.62 V W68
2022-12-27 06:06:19 C 12 21 50.098 -44 23 57.23 V W68
2023-01-02 01:15:24 C 12 59 42.722 -46 43 21.97 V M22
2023-01-02 01:43:06 C 12 59 50.453 -46 43 45.48 V M22
2023-01-02 01:47:00 C 12 59 51.523 -46 43 48.61 V M22
2023-01-02 01:59:24 C 12 59 54.984 -46 43 59.12 V M22
2023-01-04 06:07:50 C 13 14 44.755 -47 23 06.43 V W68
2023-01-04 06:44:26 C 13 14 55.152 -47 23 32.32 V W68
2023-01-04 07:20:22 C 13 15 05.395 -47 23 57.88 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)