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
2016-11-08 10:52:20 C 02 55 28.49 +11 39 29.4 L T05
2016-11-08 11:30:06 C 02 55 25.74 +11 38 46.9 L T05
2016-11-08 11:59:47 C 02 55 23.59 +11 38 13.4 L T05
2016-11-08 12:02:45 C 02 55 23.35 +11 38 09.5 L T05
2016-11-08 23:09:49 C 02 54 36.63 +11 25 30.3 c A24
2016-11-08 23:10:52 C 02 54 36.57 +11 25 29.1 c A24
2016-11-09 00:16:03 C 02 54 31.82 +11 24 15.0 c A24
2016-11-09 00:17:05 C 02 54 31.77 +11 24 14.1 c A24
2016-11-10 04:59:49 C 02 52 30.44 +10 51 35.5 q 703
2016-11-10 05:08:29 C 02 52 29.81 +10 51 25.7 q 703
2016-11-10 05:17:07 C 02 52 29.18 +10 51 15.0 q 703
2016-11-10 05:25:47 C 02 52 28.52 +10 51 05.8 q 703
2016-11-11 01:09:40 C 02 51 04.30 +10 28 33.0 o Z22
2016-11-11 01:20:09 C 02 51 03.53 +10 28 21.2 o Z22
2016-11-11 01:22:22 C 02 51 03.37 +10 28 18.1 o Z22
2016-11-11 01:31:07 C 02 51 02.75 +10 28 08.2 o Z22
2016-11-11 03:06:57 C 02 50 56.37 +10 26 18.1 q W34
2016-11-11 03:14:44 C 02 50 55.80 +10 26 07.7 q W34
2016-11-11 03:26:23 C 02 50 54.98 +10 25 55.9 q W34
2016-11-11 03:37:54 C 02 50 54.14 +10 25 43.1 q W34
2016-11-11 03:41:36 C 02 50 53.90 +10 25 38.5 q W34
2016-11-12 09:49:21 C 02 48 45.42 +09 51 07.5 L T05
2016-11-12 10:18:21 C 02 48 43.28 +09 50 34.1 L T05
2016-11-12 10:25:45 C 02 48 42.77 +09 50 26.4 L T05
2016-11-12 11:01:20 C 02 48 40.16 +09 49 45.6 L T05
2016-11-15 00:40:32 C 02 44 18.84 +08 38 51.6 q 160
2016-11-15 00:41:41 C 02 44 18.62 +08 38 49.6 q 160
2016-11-15 00:42:51 C 02 44 18.49 +08 38 48.8 q 160
2016-11-15 00:44:01 C 02 44 18.44 +08 38 47.3 q 160
2016-11-16 00:31:27 C 02 42 38.41 +08 11 30.6 q 160
2016-11-16 00:33:27 C 02 42 38.30 +08 11 29.4 q 160
2016-11-16 00:35:32 C 02 42 38.09 +08 11 27.0 q 160
2016-11-18 04:40:54 C 02 39 02.07 +07 12 07.0 q G96
2016-11-18 04:47:04 C 02 39 01.62 +07 12 00.1 q G96
2016-11-18 04:53:18 C 02 39 01.19 +07 11 53.2 q G96
2016-11-18 04:59:41 C 02 39 00.73 +07 11 45.9 q G96
2016-11-19 04:20:12 C 02 37 25.18 +06 45 23.1 q H15
2016-11-19 04:34:05 C 02 37 24.18 +06 45 07.5 q H15
2016-11-19 04:49:10 C 02 37 23.13 +06 44 50.6 q H15
2016-11-23 02:10:01 C 02 31 13.42 +05 01 32.6 V G45
2016-11-23 03:07:40 C 02 31 09.61 +05 00 30.2 V G45
2016-11-23 04:06:16 C 02 31 05.76 +04 59 26.8 V G45
2016-11-23 05:03:25 C 02 31 01.94 +04 58 25.1 V G45
2016-11-23 05:05:47 C 02 31 01.77 +04 58 22.2 V G45
2016-11-23 05:06:27 C 02 31 01.75 +04 58 21.5 V G45
2016-11-23 05:58:56 C 02 30 58.25 +04 57 25.0 V G45
2016-11-23 06:02:39 C 02 30 58.02 +04 57 20.7 V G45
2016-11-23 06:55:54 C 02 30 54.48 +04 56 23.0 V G45
2016-11-23 07:45:07 C 02 30 51.22 +04 55 29.9 V G45
2016-11-24 02:30:59 C 02 29 40.75 +04 35 19.1 V G45
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)