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
2023-11-06 02:09:12 C 20 42 27.086 +06 37 11.03 V G96
2023-11-06 02:16:40 C 20 42 27.482 +06 37 08.44 V G96
2023-11-07 01:53:01 C 20 43 47.636 +06 28 45.12 V G96
2023-11-07 02:01:11 C 20 43 48.090 +06 28 42.35 V G96
2023-11-07 02:09:21 C 20 43 48.554 +06 28 39.36 V G96
2023-11-07 02:17:33 C 20 43 49.012 +06 28 36.30 V G96
2023-11-25 04:54:36 C 21 10 15.477 +04 35 17.78 X F52
2023-11-25 04:57:22 C 21 10 15.652 +04 35 17.34 X F52
2023-11-25 05:12:20 C 21 10 16.594 +04 35 14.72 X F52
2023-11-25 05:15:06 C 21 10 16.770 +04 35 14.23 X F52
2023-11-25 05:30:03 C 21 10 17.720 +04 35 11.63 X F52
2023-11-25 05:32:49 C 21 10 17.891 +04 35 11.12 X F52
2023-12-08 01:27:52 C 21 30 38.135 +03 57 20.70 V V00
2023-12-08 01:35:49 C 21 30 38.671 +03 57 20.16 V V00
2023-12-08 01:43:44 C 21 30 39.200 +03 57 19.58 V V00
2023-12-08 01:51:40 C 21 30 39.726 +03 57 18.94 V V00
2023-12-18 01:53:47 C 21 47 09.892 +03 48 46.30 V G96
2023-12-18 02:02:50 C 21 47 10.514 +03 48 46.04 V G96
2023-12-18 02:10:18 C 21 47 11.022 +03 48 45.50 V G96
2023-12-18 02:17:45 C 21 47 11.537 +03 48 45.25 V G96
2024-01-03 01:38:33 C 22 14 22.009 +04 07 23.92 V G96
2024-01-03 01:45:59 C 22 14 22.531 +04 07 24.60 V G96
2024-01-03 01:53:25 C 22 14 23.082 +04 07 25.21 V G96
2024-01-03 02:00:51 C 22 14 23.608 +04 07 26.04 V G96
2024-09-15 11:36:35 C 07 26 13.909 +09 30 30.35 V G96
2024-09-15 11:44:10 C 07 26 14.860 +09 30 24.30 V G96
2024-09-15 11:51:45 C 07 26 15.745 +09 30 18.04 V G96
2024-09-15 11:59:18 C 07 26 16.696 +09 30 12.64 V G96
2024-09-30 11:16:50 C 08 12 38.480 +04 05 48.98 V G96
2024-09-30 11:23:42 C 08 12 39.402 +04 05 42.07 V G96
2024-09-30 11:30:35 C 08 12 40.316 +04 05 35.16 V G96
2024-09-30 11:37:28 C 08 12 41.238 +04 05 28.21 V G96
2024-10-03 11:36:43 C 08 22 23.819 +02 50 45.28 V 703
2024-10-03 11:40:01 C 08 22 24.226 +02 50 42.40 V 703
2024-10-03 11:43:20 C 08 22 24.676 +02 50 39.19 V 703
2024-10-03 11:46:38 C 08 22 25.194 +02 50 34.98 V 703
2024-10-07 11:47:09 C 08 35 37.165 +01 06 04.93 V 703
2024-10-07 11:50:29 C 08 35 37.568 +01 06 01.40 V 703
2024-10-07 11:53:49 C 08 35 38.072 +01 05 57.41 V 703
2024-10-07 11:57:08 C 08 35 38.533 +01 05 53.56 V 703
2024-10-13 14:35:50 C 08 56 24.458 -01 43 47.64 V T05
2024-10-13 14:41:49 C 08 56 25.330 -01 43 55.06 V T05
2024-10-13 14:54:13 C 08 56 27.084 -01 44 10.14 V T05
2024-10-13 15:00:05 C 08 56 27.883 -01 44 16.44 V T05
2024-10-13 15:05:57 C 08 56 28.793 -01 44 23.60 V T05
2024-10-13 15:11:10 C 08 56 29.491 -01 44 30.30 V T05
2024-10-15 14:18:15 C 09 03 20.083 -02 41 26.66 V T08
2024-10-15 14:23:34 C 09 03 20.861 -02 41 31.74 V T08
2024-10-15 14:39:40 C 09 03 23.110 -02 41 52.08 V T08
2024-10-15 15:00:02 C 09 03 26.143 -02 42 17.71 V T08
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)