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
2024-12-09 08:22:27 C 13 00 59.268 -28 50 42.61 V W68
2024-12-09 08:26:40 C 13 01 00.187 -28 50 45.89 V W68
2025-04-26 11:29:32 C 21 31 55.088 +08 47 07.48 V 703
2025-04-26 11:32:36 C 21 31 55.297 +08 47 10.36 V 703
2025-04-26 11:35:40 C 21 31 55.477 +08 47 13.88 V 703
2025-04-26 11:38:44 C 21 31 55.718 +08 47 15.65 V 703
2025-05-08 14:09:36 C 21 50 52.980 +13 23 41.28 V T08
2025-05-08 14:17:06 C 21 50 53.390 +13 23 47.69 V T08
2025-05-08 14:40:30 C 21 50 54.773 +13 24 10.01 V T08
2025-05-08 14:46:34 C 21 50 55.111 +13 24 14.83 V T08
2025-05-25 13:54:13 C 22 11 35.700 +19 28 23.38 V T08
2025-05-25 14:18:56 C 22 11 36.682 +19 28 44.26 V T08
2025-05-25 14:24:17 C 22 11 36.905 +19 28 48.90 V T08
2025-05-25 14:29:00 C 22 11 37.145 +19 28 53.33 V T08
2025-05-25 14:46:38 C 22 11 37.788 +19 29 08.16 V T08
2025-05-26 13:13:10 C 22 12 33.300 +19 48 18.89 X F52
2025-05-26 13:30:34 C 22 12 33.982 +19 48 33.78 X F52
2025-05-26 13:47:59 C 22 12 34.662 +19 48 48.72 X F52
2025-05-26 14:05:19 C 22 12 35.341 +19 49 03.58 X F52
2025-05-27 14:17:02 C 22 13 33.238 +20 09 37.33 V T05
2025-05-27 14:25:38 C 22 13 33.602 +20 09 45.54 V T05
2025-05-27 14:32:35 C 22 13 33.895 +20 09 51.34 V T05
2025-05-27 14:41:45 C 22 13 34.178 +20 09 58.64 V T05
2025-05-29 13:37:04 C 22 15 21.790 +20 49 31.51 V T08
2025-05-29 13:41:45 C 22 15 21.948 +20 49 34.93 V T08
2025-05-29 13:49:21 C 22 15 22.174 +20 49 41.92 V T08
2025-05-29 14:16:32 C 22 15 23.191 +20 50 03.34 V T08
2025-05-30 13:41:07 C 22 16 14.350 +21 09 36.90 V T05
2025-05-30 13:45:08 C 22 16 14.455 +21 09 40.00 V T05
2025-05-30 13:53:59 C 22 16 14.760 +21 09 47.99 V T05
2025-05-30 14:19:31 C 22 16 15.643 +21 10 08.94 V T05
2025-05-31 13:35:53 C 22 17 04.838 +21 29 26.74 V T05
2025-05-31 13:48:36 C 22 17 05.227 +21 29 36.78 V T05
2025-05-31 13:53:17 C 22 17 05.426 +21 29 40.60 V T05
2025-05-31 14:23:31 C 22 17 06.360 +21 30 05.98 V T05
2025-06-09 13:14:38 C 22 23 18.857 +24 22 06.96 V T08
2025-06-09 13:18:38 C 22 23 19.013 +24 22 10.27 V T08
2025-06-09 13:32:25 C 22 23 19.294 +24 22 20.24 V T08
2025-06-09 13:46:38 C 22 23 19.627 +24 22 32.41 V T08
2025-06-16 10:14:36 C 22 26 19.352 +26 25 41.52 V G96
2025-06-16 10:22:02 C 22 26 19.432 +26 25 46.92 V G96
2025-06-16 10:29:27 C 22 26 19.514 +26 25 52.43 V G96
2025-06-16 10:36:53 C 22 26 19.604 +26 25 57.68 V G96
2025-06-21 14:16:37 C 22 27 28.644 +27 52 49.51 V T08
2025-06-21 14:21:13 C 22 27 28.598 +27 52 52.61 V T08
2025-06-21 14:25:51 C 22 27 28.682 +27 52 55.38 V T08
2025-06-21 14:29:48 C 22 27 28.714 +27 52 57.54 V T08
2025-06-21 14:43:33 C 22 27 28.759 +27 53 07.55 V T08
2025-06-24 11:34:28 C 22 27 41.227 +28 38 55.89 X F52
2025-06-24 11:51:47 C 22 27 41.219 +28 39 07.28 X F52
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)