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
2012-10-13 07:57:27 C 01 04 20.08 +23 46 20.6 18.1 c 704
2012-10-13 08:16:56 C 01 04 18.86 +23 46 04.7 18.4 c 704
2012-10-13 08:36:29 C 01 04 17.58 +23 45 48.3 18.3 c 704
2012-10-13 08:56:00 C 01 04 16.33 +23 45 32.5 18.4 c 704
2012-10-13 21:42:12 C 01 03 29.27 +23 35 01.8 o 071
2012-10-13 21:44:53 C 01 03 29.10 +23 34 59.9 o 071
2012-10-13 21:47:34 C 01 03 28.92 +23 34 57.4 o 071
2012-10-13 21:50:16 C 01 03 28.77 +23 34 54.8 o 071
2012-10-13 21:52:56 C 01 03 28.58 +23 34 52.9 o 071
2012-10-19 06:01:09 C 00 55 39.57 +21 44 19.3 r 703
2012-10-19 06:07:32 C 00 55 39.21 +21 44 13.4 r 703
2012-10-19 06:14:01 C 00 55 38.82 +21 44 07.8 r 703
2012-10-19 06:20:36 C 00 55 38.42 +21 44 01.7 r 703
2012-10-22 18:36:16 C 00 50 42.91 +20 27 06.1 q B88
2012-10-22 18:46:54 C 00 50 42.30 +20 26 56.4 q B88
2012-10-22 18:57:57 C 00 50 41.65 +20 26 46.9 q B88
2012-10-24 19:22:39 C 00 47 58.56 +19 41 37.9 q B88
2012-10-24 19:39:25 C 00 47 57.66 +19 41 22.0 q B88
2012-10-24 19:56:15 C 00 47 56.70 +19 41 06.3 q B88
2012-10-25 04:50:55 C 00 47 27.27 +19 32 46.6 r 703
2012-10-25 04:51:37 C 00 47 27.34 +19 32 46.3 r 703
2012-10-25 05:01:52 C 00 47 26.62 +19 32 35.0 r 703
2012-10-25 05:02:36 C 00 47 26.66 +19 32 36.2 r 703
2012-10-25 05:12:45 C 00 47 26.05 +19 32 26.1 r 703
2012-10-25 05:13:26 C 00 47 26.05 +19 32 26.0 r 703
2012-10-25 05:23:37 C 00 47 25.47 +19 32 16.4 r 703
2012-10-25 05:24:20 C 00 47 25.40 +19 32 15.8 r 703
2012-11-01 05:52:47 C 00 38 54.81 +16 52 50.9 q H45
2012-11-01 05:55:35 C 00 38 54.69 +16 52 48.8 q H45
2012-11-01 05:58:40 C 00 38 54.54 +16 52 45.8 q H45
2012-11-01 06:02:01 C 00 38 54.34 +16 52 42.4 q H45
2012-11-01 06:04:24 C 00 38 54.23 +16 52 40.1 q H45
2012-11-04 02:11:23 C 00 35 55.97 +15 48 48.0 o 926
2012-11-04 02:28:42 C 00 35 55.22 +15 48 31.6 o 926
2012-11-04 02:45:29 C 00 35 54.49 +15 48 16.1 o 926
2012-11-09 18:58:48 C 00 30 51.58 +13 44 20.5 r 106
2012-11-09 19:17:18 C 00 30 50.96 +13 44 03.7 r 106
2012-11-09 19:35:49 C 00 30 50.33 +13 43 47.4 r 106
2012-11-09 19:54:20 C 00 30 49.70 +13 43 31.1 r 106
2012-11-14 03:46:57 C 00 27 51.47 +12 14 20.9 18.5 c 704
2012-11-14 04:08:12 C 00 27 50.98 +12 14 02.0 19.1 c 704
2012-11-14 04:29:59 C 00 27 50.29 +12 13 45.7 19.1 c 704
2012-11-14 04:52:06 C 00 27 49.78 +12 13 26.7 18.9 c 704
2012-11-14 05:13:48 C 00 27 49.14 +12 13 09.9 19.0 c 704
2012-11-20 02:05:47 C 00 25 03.68 +10 21 49.3 r 703
2012-11-20 02:12:12 C 00 25 03.61 +10 21 44.9 r 703
2012-11-20 02:18:41 C 00 25 03.43 +10 21 39.6 r 703
2012-11-20 02:25:09 C 00 25 03.39 +10 21 35.8 r 703
2012-12-03 19:48:11 C 00 24 03.58 +06 52 10.2 c A24
2012-12-03 20:08:23 C 00 24 03.75 +06 51 58.9 c A24
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)