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
2014-11-01 04:24:25 C 01 45 30.14 +16 58 20.5 q 703
2014-11-01 05:37:07 C 01 45 25.36 +16 57 08.6 q 703
2014-11-01 05:52:10 C 01 45 24.35 +16 56 53.9 q 703
2014-11-01 06:11:47 C 01 45 23.07 +16 56 34.4 q 703
2014-11-01 06:33:52 C 01 45 21.58 +16 56 12.1 q 703
2014-11-01 22:21:35 C 01 44 21.25 +16 40 23.9 q 160
2014-11-01 22:24:24 C 01 44 21.04 +16 40 22.0 q 160
2014-11-01 22:27:13 C 01 44 20.83 +16 40 18.8 q 160
2014-11-09 05:41:57 C 01 33 44.52 +13 43 42.3 q H45
2014-11-09 05:43:46 C 01 33 44.37 +13 43 40.3 q H45
2014-11-09 05:45:21 C 01 33 44.27 +13 43 37.6 q H45
2014-11-09 05:47:05 C 01 33 44.15 +13 43 36.7 q H45
2014-11-09 05:48:25 C 01 33 44.07 +13 43 34.8 q H45
2014-11-09 05:50:10 C 01 33 43.96 +13 43 33.3 q H45
2014-11-09 21:29:00 C 01 32 51.25 +13 27 48.8 Q I99
2014-11-09 21:33:41 C 01 32 50.97 +13 27 44.7 Q I99
2014-11-09 21:38:26 C 01 32 50.70 +13 27 39.6 Q I99
2014-11-10 02:38:24 C 01 32 34.15 +13 22 39.6 q H15
2014-11-10 02:53:24 C 01 32 33.28 +13 22 24.4 q H15
2014-11-10 03:09:25 C 01 32 32.36 +13 22 08.8 q H15
2014-11-10 03:24:31 C 01 32 31.50 +13 21 53.5 q H15
2014-11-11 02:08:35 C 01 31 16.38 +12 59 09.4 o 691
2014-11-11 03:11:52 C 01 31 12.83 +12 58 06.6 o 691
2014-11-11 04:01:57 C 01 31 10.01 +12 57 16.7 o 691
2014-11-14 16:21:14 C 01 26 46.52 +11 34 10.7 o C94
2014-11-14 16:25:01 C 01 26 46.32 +11 34 06.5 o C94
2014-11-14 16:28:49 C 01 26 46.11 +11 34 03.6 o C94
2014-11-17 04:30:27 C 01 23 55.16 +10 36 34.4 R G45
2014-11-17 04:36:25 C 01 23 54.86 +10 36 28.7 R G45
2014-11-17 04:43:15 C 01 23 54.54 +10 36 22.2 R G45
2014-11-17 04:49:13 C 01 23 54.24 +10 36 17.0 R G45
2014-11-17 04:52:14 C 01 23 54.09 +10 36 14.0 R G45
2014-11-17 04:58:12 C 01 23 53.83 +10 36 08.2 R G45
2014-11-18 04:26:34 C 01 22 50.95 +10 14 07.2 R G45
2014-11-18 04:32:32 C 01 22 50.66 +10 14 01.6 R G45
2014-11-18 04:39:31 C 01 22 50.34 +10 13 54.5 R G45
2014-11-18 04:45:29 C 01 22 50.06 +10 13 49.4 R G45
2014-11-18 04:48:30 C 01 22 49.95 +10 13 46.0 R G45
2014-11-18 04:54:27 C 01 22 49.66 +10 13 41.1 R G45
2014-11-18 06:12:29 C 01 22 46.532 +10 12 29.77 L F51
2014-11-18 06:29:40 C 01 22 45.746 +10 12 13.83 L F51
2014-11-18 06:46:48 C 01 22 44.957 +10 11 57.94 L F51
2014-11-18 07:04:07 C 01 22 44.159 +10 11 41.83 L F51
2014-11-19 04:29:00 C 01 21 48.87 +09 51 51.4 R G45
2014-11-19 04:29:52 C 01 21 48.83 +09 51 50.2 R G45
2014-11-19 04:35:59 C 01 21 48.57 +09 51 44.6 R G45
2014-11-19 04:45:06 C 01 21 48.16 +09 51 36.1 R G45
2014-11-19 04:51:16 C 01 21 47.87 +09 51 29.8 R G45
2014-11-19 22:16:40 C 01 21 04.37 +09 35 32.7 q 160
2014-11-19 22:19:39 C 01 21 04.24 +09 35 30.2 q 160
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)