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
2014-12-15 17:32:26 C 01 10 26.28 +02 30 23.8 o C41
2014-12-15 18:41:05 C 01 10 26.55 +02 29 52.6 o C41
2014-12-15 18:44:34 C 01 10 26.61 +02 29 51.9 o C41
2014-12-15 18:48:00 C 01 10 26.66 +02 29 49.8 o C41
2014-12-16 17:39:08 C 01 10 36.14 +02 19 45.8 o C41
2014-12-16 17:42:37 C 01 10 36.13 +02 19 44.4 o C41
2014-12-16 17:46:03 C 01 10 36.12 +02 19 42.0 o C41
2014-12-18 06:13:55 C 01 10 55.672 +02 04 26.35 L F51
2014-12-18 06:31:22 C 01 10 55.813 +02 04 19.30 L F51
2014-12-18 06:48:49 C 01 10 55.956 +02 04 12.22 L F51
2014-12-21 02:07:13 C 01 11 46.31 +01 38 25.7 R G45
2014-12-21 02:13:11 C 01 11 46.38 +01 38 23.3 R G45
2014-12-21 02:14:50 C 01 11 46.42 +01 38 22.6 R G45
2014-12-21 02:20:48 C 01 11 46.50 +01 38 20.8 R G45
2014-12-21 02:28:59 C 01 11 46.58 +01 38 17.9 R G45
2014-12-22 02:03:51 C 01 12 08.46 +01 30 01.5 R G45
2014-12-22 02:09:48 C 01 12 08.54 +01 29 59.7 R G45
2014-12-22 02:11:28 C 01 12 08.57 +01 29 58.9 R G45
2014-12-22 02:17:26 C 01 12 08.66 +01 29 57.3 R G45
2014-12-22 02:25:38 C 01 12 08.78 +01 29 54.0 R G45
2014-12-22 02:31:36 C 01 12 08.86 +01 29 51.9 R G45
2014-12-27 01:44:30 C 01 14 31.98 +00 53 38.9 R G45
2014-12-27 01:50:28 C 01 14 32.06 +00 53 36.8 R G45
2014-12-27 01:58:05 C 01 14 32.25 +00 53 35.3 R G45
2014-12-27 02:04:04 C 01 14 32.40 +00 53 33.4 R G45
2014-12-27 02:06:18 C 01 14 32.52 +00 53 32.9 R G45
2014-12-27 02:12:15 C 01 14 32.57 +00 53 31.2 R G45
2014-12-28 01:42:31 C 01 15 07.02 +00 47 26.8 R G45
2014-12-28 01:48:30 C 01 15 07.16 +00 47 24.6 R G45
2014-12-28 01:50:08 C 01 15 07.24 +00 47 24.2 R G45
2014-12-28 01:56:07 C 01 15 07.32 +00 47 23.0 R G45
2014-12-28 02:10:11 C 01 15 07.65 +00 47 19.4 R G45
2015-01-05 01:13:22 C 01 20 56.93 +00 09 31.2 q 448
2015-01-05 01:27:11 C 01 20 57.41 +00 09 29.1 q 448
2015-01-05 01:38:12 C 01 20 57.76 +00 09 27.9 q 448
2015-01-08 05:19:58 C 01 23 48.118 -00 00 14.77 L F51
2015-01-08 05:37:49 C 01 23 48.792 -00 00 16.72 L F51
2015-01-08 05:55:40 C 01 23 49.466 -00 00 18.69 L F51
2015-01-08 06:13:32 C 01 23 50.140 -00 00 20.62 L F51
2015-01-10 05:16:14 C 01 25 44.822 -00 05 01.19 L F51
2015-01-10 05:33:07 C 01 25 45.499 -00 05 02.67 L F51
2015-01-10 05:49:50 C 01 25 46.168 -00 05 04.18 L F51
2015-01-16 03:37:35 C 01 32 09.28 -00 13 22.0 R G45
2015-01-16 03:43:36 C 01 32 09.63 -00 13 22.8 R G45
2015-01-16 03:49:34 C 01 32 09.86 -00 13 24.3 R G45
2015-01-16 03:59:19 C 01 32 10.40 -00 13 24.2 R G45
2015-01-17 03:36:14 C 01 33 19.57 -00 14 00.4 R G45
2015-01-17 03:42:15 C 01 33 19.87 -00 13 59.6 R G45
2015-01-17 03:52:09 C 01 33 20.33 -00 14 00.4 R G45
2015-01-17 03:58:10 C 01 33 20.63 -00 14 00.1 R 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)