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
2022-11-13 11:40:48 C 09 04 28.646 -13 27 05.76 V 703
2022-11-13 11:47:47 C 09 04 29.539 -13 27 19.22 V 703
2022-11-13 11:54:45 C 09 04 30.464 -13 27 31.75 V 703
2022-11-16 10:36:09 C 09 14 11.152 -15 36 54.36 V 703
2022-11-16 10:43:08 C 09 14 12.102 -15 37 07.50 V 703
2022-11-16 10:50:08 C 09 14 13.052 -15 37 20.10 V 703
2022-11-16 10:57:07 C 09 14 14.039 -15 37 33.53 V 703
2022-11-18 07:23:50 C 09 20 29.107 -17 00 21.56 V W68
2022-11-18 07:28:23 C 09 20 29.760 -17 00 30.17 V W68
2022-11-18 07:35:42 C 09 20 30.770 -17 00 44.32 V W68
2022-11-18 07:50:45 C 09 20 32.875 -17 01 12.32 V W68
2022-11-19 08:23:11 C 09 24 03.439 -17 47 30.88 V W68
2022-11-19 08:25:46 C 09 24 03.811 -17 47 35.66 V W68
2022-11-19 08:30:02 C 09 24 04.411 -17 47 43.94 V W68
2022-11-19 08:33:05 C 09 24 04.838 -17 47 49.52 V W68
2022-11-19 11:18:04 C 09 24 28.588 -17 53 12.01 V 703
2022-11-19 11:25:36 C 09 24 29.671 -17 53 26.52 V 703
2022-11-19 11:33:09 C 09 24 30.748 -17 53 40.99 V 703
2022-11-19 11:40:42 C 09 24 31.828 -17 53 55.28 V 703
2022-11-20 01:32:02 C 09 26 32.278 -18 20 02.26 V M22
2022-11-20 01:36:36 C 09 26 32.947 -18 20 10.97 V M22
2022-11-20 01:44:23 C 09 26 34.044 -18 20 26.02 V M22
2022-11-20 01:58:43 C 09 26 36.096 -18 20 53.48 V M22
2022-11-21 01:22:24 C 09 30 01.279 -19 05 29.76 V M22
2022-11-21 01:51:11 C 09 30 05.460 -19 06 25.16 V M22
2022-11-21 02:17:04 C 09 30 09.204 -19 07 14.77 V M22
2022-11-21 02:21:15 C 09 30 09.778 -19 07 23.27 V M22
2022-11-23 07:14:40 C 09 38 03.468 -20 49 04.84 V W68
2022-11-23 07:19:51 C 09 38 04.241 -20 49 15.10 V W68
2022-11-23 07:27:39 C 09 38 05.412 -20 49 30.11 V W68
2022-11-23 08:00:29 C 09 38 10.301 -20 50 33.79 V W68
2022-11-26 07:36:52 C 09 49 14.376 -23 09 34.52 V W68
2022-11-26 07:59:05 C 09 49 17.820 -23 10 18.01 V W68
2022-11-26 08:04:56 C 09 49 18.725 -23 10 29.57 V W68
2022-11-26 08:16:36 C 09 49 20.544 -23 10 52.43 V W68
2022-11-30 08:13:54 C 10 04 56.486 -26 18 02.74 V W68
2022-11-30 08:18:23 C 10 04 57.238 -26 18 11.45 V W68
2022-11-30 08:22:26 C 10 04 57.905 -26 18 19.33 V W68
2022-11-30 08:26:16 C 10 04 58.546 -26 18 26.71 V W68
2022-12-01 06:36:46 C 10 08 43.318 -27 01 35.87 V W68
2022-12-01 06:41:19 C 10 08 44.078 -27 01 44.80 V W68
2022-12-01 06:49:10 C 10 08 45.430 -27 02 00.28 V W68
2022-12-01 07:17:29 C 10 08 50.167 -27 02 55.72 V W68
2022-12-01 12:41:11 C 10 09 44.809 -27 13 37.20 V 703
2022-12-01 12:47:37 C 10 09 45.900 -27 13 49.66 V 703
2022-12-01 12:54:03 C 10 09 46.998 -27 14 01.90 V 703
2022-12-01 13:00:29 C 10 09 48.035 -27 14 13.92 V 703
2022-12-02 00:31:59 C 10 11 47.148 -27 36 24.91 V M22
2022-12-02 00:36:32 C 10 11 47.921 -27 36 34.02 V M22
2022-12-02 00:45:42 C 10 11 49.474 -27 36 51.80 V M22
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)