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
2021-07-10 08:54:00 s 1 +161145.90 4 +36508.977 9440.0 C57
2021-07-10 09:04:00 S 19 06 02.926 +36 49 38.57 V C57
2021-07-10 09:04:00 s 1 +161505.26 1 +37489.483 810.0 C57
2021-07-10 09:06:58 C 19 06 30.67 +36 48 16.3 V T08
2021-07-10 09:14:00 S 19 06 02.170 +36 49 37.56 V C57
2021-07-10 09:14:00 s 1 +161860.09 0 +38468.932 8970.0 C57
2021-07-10 09:17:21 C 19 06 29.90 +36 48 12.3 V T08
2021-07-10 09:20:00 C 19 06 29.69 +36 48 11.4 V T08
2021-07-10 09:34:00 S 19 06 00.283 +36 49 29.75 V C57
2021-07-10 09:34:00 s 1 +162556.30 6 +40424.594 6120.0 C57
2021-07-10 09:44:00 S 19 05 59.623 +36 49 23.05 V C57
2021-07-10 09:44:00 s 1 +162897.76 2 +41400.775 5310.0 C57
2021-07-10 09:54:00 S 19 05 58.762 +36 49 18.44 V C57
2021-07-10 09:54:00 s 1 +163234.82 8 +42375.834 1720.0 C57
2021-07-10 10:04:00 S 19 05 57.910 +36 49 13.48 V C57
2021-07-10 10:04:00 s 1 +163567.53 7 +43349.757 5450.0 C57
2021-07-10 10:10:26 C 19 06 25.93 +36 47 51.8 V T08
2021-07-10 10:24:00 S 19 05 56.506 +36 49 01.16 V C57
2021-07-10 10:24:00 s 1 +164220.02 1 +45294.135 5270.0 C57
2021-07-10 10:34:00 S 19 05 55.579 +36 48 58.21 V C57
2021-07-10 10:34:00 s 1 +164539.86 2 +46264.562 1550.0 C57
2021-07-10 10:44:00 S 19 05 54.766 +36 48 54.97 V C57
2021-07-10 10:44:00 s 1 +164855.47 8 +47233.796 5560.0 C57
2021-07-10 10:54:00 S 19 05 54.197 +36 48 50.54 V C57
2021-07-10 10:54:00 s 1 +165166.90 2 +48201.823 7380.0 C57
2021-07-10 11:04:00 S 19 05 53.119 +36 48 46.58 V C57
2021-07-10 11:04:00 s 1 +165474.16 6 +49168.630 7120.0 C57
2021-07-10 11:14:00 S 19 05 52.421 +36 48 38.59 V C57
2021-07-10 11:14:00 s 1 +165777.30 2 +50134.206 4860.0 C57
2021-07-10 11:34:00 S 19 05 50.813 +36 48 28.94 V C57
2021-07-10 11:34:00 s 1 +166371.31 3 +52061.611 4760.0 C57
2021-07-10 11:44:00 S 19 05 50.138 +36 48 23.36 V C57
2021-07-10 11:44:00 s 1 +166662.25 0 +53023.418 7090.0 C57
2021-07-10 11:54:00 S 19 05 49.123 +36 48 20.66 V C57
2021-07-10 11:54:00 s 1 +166949.18 2 +53983.945 7810.0 C57
2021-07-10 12:04:00 S 19 05 48.329 +36 48 15.62 V C57
2021-07-10 12:04:00 s 1 +167232.14 0 +54943.181 7010.0 C57
2021-07-10 12:14:00 S 19 05 47.561 +36 48 09.25 V C57
2021-07-10 12:14:00 s 1 +167511.15 4 +55901.117 4770.0 C57
2021-07-10 12:44:00 S 19 05 45.396 +36 47 55.79 V C57
2021-07-10 12:44:00 s 1 +168324.82 3 +58767.013 330.0 C57
2021-07-10 12:54:00 S 19 05 44.621 +36 47 50.10 V C57
2021-07-10 12:54:00 s 1 +168588.35 3 +59719.642 3240.0 C57
2021-07-10 14:54:00 S 19 05 34.997 +36 46 49.66 V C57
2021-07-10 14:54:00 s 1 +171462.36 4 +71043.401 4440.0 C57
2021-07-10 15:14:00 S 19 05 33.713 +36 46 41.56 V C57
2021-07-10 15:14:00 s 1 +171891.49 6 +72910.804 7340.0 C57
2021-07-10 15:24:00 S 19 05 32.774 +36 46 37.42 V C57
2021-07-10 15:24:00 s 1 +172100.91 4 +73842.324 3950.0 C57
2021-07-10 15:44:00 S 19 05 31.262 +36 46 30.79 V C57
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)