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
2014-11-19 22:22:36 C 01 21 04.09 +09 35 27.6 q 160
2014-11-20 04:29:36 C 01 20 49.36 +09 29 55.2 R G45
2014-11-20 04:35:34 C 01 20 49.12 +09 29 50.6 R G45
2014-11-20 04:38:34 C 01 20 48.97 +09 29 47.6 R G45
2014-11-20 04:44:32 C 01 20 48.70 +09 29 42.1 R G45
2014-11-20 21:27:59 C 01 20 08.65 +09 14 36.7 q 160
2014-11-20 21:30:58 C 01 20 08.55 +09 14 33.5 q 160
2014-11-20 21:33:56 C 01 20 08.44 +09 14 31.1 q 160
2014-11-23 04:02:57 C 01 18 07.13 +08 26 40.6 R G45
2014-11-23 04:08:55 C 01 18 06.93 +08 26 35.5 R G45
2014-11-23 04:09:59 C 01 18 06.91 +08 26 35.8 R G45
2014-11-23 04:15:57 C 01 18 06.65 +08 26 29.5 R G45
2014-11-23 04:21:55 C 01 18 06.43 +08 26 24.5 R G45
2014-11-23 04:24:43 C 01 18 06.32 +08 26 22.2 R G45
2014-11-23 04:30:42 C 01 18 06.11 +08 26 17.2 R G45
2014-11-24 04:04:48 C 01 17 17.86 +08 06 11.5 R G45
2014-11-24 04:11:51 C 01 17 17.63 +08 06 05.2 R G45
2014-11-24 04:20:37 C 01 17 17.31 +08 05 58.0 R G45
2014-11-24 04:26:36 C 01 17 17.11 +08 05 53.1 R G45
2014-11-25 03:50:51 C 01 16 31.75 +07 46 18.1 R G45
2014-11-25 03:56:50 C 01 16 31.53 +07 46 13.5 R G45
2014-11-25 04:03:51 C 01 16 31.35 +07 46 07.7 R G45
2014-11-25 04:09:49 C 01 16 31.15 +07 46 02.9 R G45
2014-11-25 04:12:38 C 01 16 31.08 +07 46 00.3 R G45
2014-11-25 04:18:36 C 01 16 30.82 +07 45 55.4 R G45
2014-11-25 04:24:35 C 01 16 30.61 +07 45 50.5 R G45
2014-11-25 05:15:55 C 01 16 28.98 +07 45 08.1 q 703
2014-11-25 05:30:08 C 01 16 28.44 +07 44 56.1 q 703
2014-11-25 05:44:13 C 01 16 28.03 +07 44 44.4 q 703
2014-11-25 05:59:00 C 01 16 27.51 +07 44 32.7 q 703
2014-11-26 03:47:53 C 01 15 48.02 +07 26 39.7 R G45
2014-11-26 03:53:51 C 01 15 47.78 +07 26 35.0 R G45
2014-11-26 04:00:53 C 01 15 47.58 +07 26 29.4 R G45
2014-11-26 04:06:51 C 01 15 47.40 +07 26 24.6 R G45
2014-11-26 04:09:40 C 01 15 47.31 +07 26 22.5 R G45
2014-11-26 04:15:38 C 01 15 47.11 +07 26 17.8 R G45
2014-11-28 06:16:43 C 01 14 24.629 +06 46 41.49 L F51
2014-11-28 06:33:25 C 01 14 24.164 +06 46 28.59 L F51
2014-11-28 06:50:09 C 01 14 23.701 +06 46 15.68 L F51
2014-11-28 07:06:55 C 01 14 23.234 +06 46 02.67 L F51
2014-12-06 07:20:53 C 01 10 55.708 +04 31 40.93 L F51
2014-12-06 07:38:45 C 01 10 55.480 +04 31 29.80 L F51
2014-12-06 07:56:40 C 01 10 55.255 +04 31 18.62 L F51
2014-12-06 08:14:32 C 01 10 55.029 +04 31 07.46 L F51
2014-12-12 02:38:13 C 01 10 11.30 +03 12 21.5 q 703
2014-12-12 02:44:00 C 01 10 11.29 +03 12 18.4 q 703
2014-12-12 02:49:46 C 01 10 11.32 +03 12 15.7 q 703
2014-12-12 02:55:34 C 01 10 11.31 +03 12 12.5 q 703
2014-12-15 17:25:33 C 01 10 26.25 +02 30 28.1 o C41
2014-12-15 17:28:58 C 01 10 26.28 +02 30 26.4 o C41
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)