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
2015-01-18 03:28:57 C 01 34 30.97 -00 14 22.9 R G45
2015-01-18 03:34:58 C 01 34 31.29 -00 14 23.2 R G45
2015-01-18 03:41:02 C 01 34 31.58 -00 14 23.0 R G45
2015-01-18 03:44:47 C 01 34 31.78 -00 14 23.2 R G45
2015-01-18 03:50:50 C 01 34 32.07 -00 14 23.2 R G45
2015-01-18 03:56:48 C 01 34 32.38 -00 14 23.2 R G45
2015-01-19 03:26:31 C 01 35 44.16 -00 14 34.4 R G45
2015-01-19 03:32:23 C 01 35 44.44 -00 14 34.0 R G45
2015-01-19 03:38:21 C 01 35 44.73 -00 14 34.3 R G45
2015-01-19 03:42:08 C 01 35 44.93 -00 14 34.1 R G45
2015-01-19 03:48:17 C 01 35 45.24 -00 14 34.2 R G45
2015-01-24 03:10:36 C 01 42 11.56 -00 12 31.3 R G45
2015-01-24 03:16:35 C 01 42 11.78 -00 12 32.1 R G45
2015-01-24 03:24:12 C 01 42 12.23 -00 12 31.5 R G45
2015-01-24 03:35:15 C 01 42 12.80 -00 12 31.2 R G45
2015-01-25 03:22:24 C 01 43 34.00 -00 11 34.3 R G45
2015-01-25 03:25:59 C 01 43 34.14 -00 11 34.5 R G45
2015-01-25 03:32:03 C 01 43 34.52 -00 11 32.9 R G45
2015-01-25 03:38:01 C 01 43 34.91 -00 11 34.2 R G45
2015-01-28 03:02:34 C 01 47 46.61 -00 07 40.8 R G45
2015-01-28 03:05:49 C 01 47 46.90 -00 07 39.6 R G45
2015-01-28 03:22:36 C 01 47 47.75 -00 07 40.4 R G45
2015-01-28 03:28:46 C 01 47 48.13 -00 07 39.6 R G45
2016-08-31 18:46:04 C 03 26 04.22 +26 59 22.8 q D29
2016-08-31 18:54:58 C 03 26 04.51 +26 59 22.0 q D29
2016-08-31 19:05:09 C 03 26 04.87 +26 59 20.7 q D29
2016-08-31 19:14:04 C 03 26 05.17 +26 59 20.4 q D29
2016-08-31 19:24:15 C 03 26 05.46 +26 59 20.0 q D29
2016-08-31 19:33:10 C 03 26 05.74 +26 59 18.8 q D29
2016-09-11 09:34:56 C 03 33 12.51 +26 27 32.1 q 703
2016-09-11 09:41:25 C 03 33 12.67 +26 27 29.9 q 703
2016-09-11 09:47:55 C 03 33 12.83 +26 27 29.7 q 703
2016-09-11 09:54:25 C 03 33 12.96 +26 27 27.4 q 703
2016-10-05 03:21:38 C 03 35 11.50 +23 19 02.5 q 160
2016-10-05 03:24:39 C 03 35 11.39 +23 19 00.2 q 160
2016-10-05 03:27:38 C 03 35 11.34 +23 18 58.7 q 160
2016-10-07 10:38:11 C 03 34 07.082 +22 49 27.70 L F51
2016-10-07 10:56:56 C 03 34 06.637 +22 49 17.35 L F51
2016-10-07 11:15:42 C 03 34 06.188 +22 49 06.97 L F51
2016-10-07 11:34:30 C 03 34 05.735 +22 48 56.60 L F51
2016-10-08 12:32:34 C 03 33 31.27 +22 34 45.3 L T05
2016-10-08 13:05:15 C 03 33 30.45 +22 34 27.2 L T05
2016-10-08 13:20:56 C 03 33 30.06 +22 34 18.9 L T05
2016-10-08 13:38:03 C 03 33 29.57 +22 34 07.7 L T05
2016-10-08 22:53:26 C 03 33 16.20 +22 28 42.1 o C41
2016-10-08 23:32:47 C 03 33 15.20 +22 28 18.5 o C41
2016-10-08 23:36:48 C 03 33 15.10 +22 28 16.1 o C41
2016-10-08 23:40:33 C 03 33 14.99 +22 28 14.2 o C41
2016-10-09 04:22:37 C 03 33 07.82 +22 25 28.2 18.4 q J43
2016-10-09 04:34:55 C 03 33 07.48 +22 25 21.0 18.5 q J43
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)