IAA RAS IAA Minor Planet Database

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
2021-01-06 00:34:08 S 06 45 11.834 -57 15 49.79 – V C57
2021-01-06 00:44:08 S 06 45 11.107 -57 16 11.78 – V C57
2021-01-06 00:54:08 S 06 45 10.358 -57 16 34.54 – V C57
2021-01-06 01:04:08 S 06 45 09.478 -57 16 56.32 – V C57
2021-01-06 01:14:08 S 06 45 08.755 -57 17 18.20 – V C57
2021-01-06 01:24:08 S 06 45 08.119 -57 17 39.41 – V C57
2021-01-06 01:34:08 S 06 45 07.200 -57 18 02.52 – V C57
2021-01-06 01:44:08 S 06 45 06.410 -57 18 24.41 – V C57
2021-01-06 01:54:08 S 06 45 05.863 -57 18 45.94 – V C57
2021-01-06 02:04:08 S 06 45 04.999 -57 19 08.62 – V C57
2021-01-06 02:14:08 S 06 45 04.164 -57 19 29.86 – V C57
2021-01-06 02:24:08 S 06 45 03.478 -57 19 52.64 – V C57
2021-01-06 02:34:08 S 06 45 02.700 -57 20 14.17 – V C57
2021-01-06 02:44:08 S 06 45 01.951 -57 20 36.17 – V C57
2021-01-06 02:54:08 S 06 45 01.178 -57 20 57.34 – V C57
2021-01-06 03:04:08 S 06 45 00.418 -57 21 19.73 – V C57
2021-01-06 03:14:08 S 06 44 59.527 -57 21 41.51 – V C57
2021-01-06 03:24:08 S 06 44 58.925 -57 22 02.71 – V C57
2021-01-06 03:34:08 S 06 44 58.090 -57 22 26.98 – V C57
2021-01-06 03:44:08 S 06 44 57.295 -57 22 48.04 – V C57
2021-01-06 03:54:08 S 06 44 56.707 -57 23 08.84 – V C57
2021-01-06 04:04:08 S 06 44 55.975 -57 23 31.85 – V C57
2021-01-06 04:14:08 S 06 44 55.092 -57 23 53.09 – V C57
2021-01-06 04:24:08 S 06 44 54.269 -57 24 14.94 – V C57
2021-01-06 04:34:08 S 06 44 53.633 -57 24 36.14 – V C57
2021-01-06 04:44:08 S 06 44 52.721 -57 24 59.15 – V C57
2021-01-06 05:54:08 S 06 44 47.383 -57 27 32.00 – V C57
2021-01-06 06:04:08 S 06 44 46.728 -57 27 54.11 – V C57
2021-01-06 06:14:08 S 06 44 45.809 -57 28 16.54 – V C57
2021-01-06 06:24:08 S 06 44 45.082 -57 28 37.67 – V C57
2021-01-06 06:34:08 S 06 44 44.378 -57 28 59.38 – V C57
2021-01-06 06:44:08 S 06 44 43.454 -57 29 21.66 – V C57
2021-01-06 06:54:08 S 06 44 42.626 -57 29 43.94 – V C57
2021-01-06 07:04:08 S 06 44 42.034 -57 30 05.00 – V C57
2021-01-06 07:14:08 S 06 44 41.206 -57 30 27.68 – V C57
2021-01-06 07:24:08 S 06 44 40.442 -57 30 49.36 – V C57
2021-01-06 07:34:08 S 06 44 39.708 -57 31 11.14 – V C57
2021-01-06 07:44:08 S 06 44 38.897 -57 31 32.16 – V C57
2021-01-06 07:54:08 S 06 44 38.064 -57 31 53.72 – V C57
2021-01-06 08:04:08 S 06 44 37.322 -57 32 15.76 – V C57
2021-01-06 08:04:08 s 1 -10191.729 0 +401001.09 5970.0 – C57
2021-01-06 08:14:08 S 06 44 36.581 -57 32 37.75 – V C57
2021-01-06 08:14:08 s 1 -10531.683 0 +401051.80 3850.0 – C57
2021-01-06 08:24:08 S 06 44 35.762 -57 32 59.93 – V C57
2021-01-06 08:24:08 s 1 -10871.609 0 +401101.63 1680.0 – C57
2021-01-06 08:34:08 S 06 44 34.997 -57 33 21.28 – V C57
2021-01-06 08:34:08 s 1 -11211.505 0 +401150.57 9460.0 – C57
2021-01-06 08:44:08 S 06 44 34.315 -57 33 42.44 – V C57
2021-01-06 08:44:08 s 1 -11551.371 0 +401198.63 7200.0 – C57
2021-01-06 08:54:08 S 06 44 33.523 -57 34 05.77 – 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)