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
2021-01-25 23:24:07 S 05 53 17.309 -72 00 29.45 – V C57
2021-01-25 23:24:07 s 1 -170850.05 9 +44878.873 8490.0 – C57
2021-01-25 23:34:07 S 05 53 15.890 -72 00 41.29 – V C57
2021-01-25 23:34:07 s 1 -170432.10 6 +43973.440 3040.0 – C57
2021-01-25 23:44:07 S 05 53 14.393 -72 00 56.74 – V C57
2021-01-25 23:44:07 s 1 -170009.86 2 +43066.906 9860.0 – C57
2021-01-25 23:54:07 S 05 53 13.114 -72 01 10.52 – V C57
2021-01-25 23:54:07 s 1 -169583.29 1 +42159.281 8880.0 – C57
2021-01-26 00:34:07 S 05 53 07.546 -72 02 05.46 – V C57
2021-01-26 00:34:07 s 1 -167833.01 7 +38518.110 5750.0 – C57
2021-01-26 00:44:07 S 05 53 06.106 -72 02 19.03 – V C57
2021-01-26 00:44:07 s 1 -167384.26 7 +37605.211 4820.0 – C57
2021-01-26 00:54:07 S 05 53 04.982 -72 02 31.56 – V C57
2021-01-26 00:54:07 s 1 -166930.96 8 +36691.295 5690.0 – C57
2021-01-26 01:04:07 S 05 53 03.955 -72 02 48.16 – V C57
2021-01-26 01:04:07 s 1 -166473.08 3 +35776.376 8300.0 – C57
2021-01-26 01:14:07 S 05 53 02.515 -72 03 01.37 – V C57
2021-01-26 01:14:07 s 1 -166010.57 3 +34860.469 2570.0 – C57
2021-01-26 01:24:07 S 05 53 00.962 -72 03 15.44 – V C57
2021-01-26 01:24:07 s 1 -165543.39 9 +33943.587 8430.0 – C57
2021-01-26 01:34:07 S 05 52 59.707 -72 03 30.56 – V C57
2021-01-26 01:34:07 s 1 -165071.52 0 +33025.745 5810.0 – C57
2021-01-26 01:44:07 S 05 52 58.224 -72 03 41.87 – V C57
2021-01-26 01:44:07 s 1 -164594.89 6 +32106.959 4630.0 – C57
2021-01-26 01:54:07 S 05 52 56.796 -72 03 55.51 – V C57
2021-01-26 01:54:07 s 1 -164113.48 8 +31187.245 4820.0 – C57
2021-01-26 02:04:07 S 05 52 55.759 -72 04 09.98 – V C57
2021-01-26 02:04:07 s 1 -163627.25 3 +30266.618 6310.0 – C57
2021-01-26 02:14:07 S 05 52 54.089 -72 04 23.59 – V C57
2021-01-26 02:14:07 s 1 -163136.15 1 +29345.096 9020.0 – C57
2021-01-26 02:24:07 S 05 52 52.987 -72 04 37.16 – V C57
2021-01-26 02:24:07 s 1 -162640.13 8 +28422.695 2870.0 – C57
2021-01-26 02:34:07 S 05 52 51.442 -72 04 50.70 – V C57
2021-01-26 02:34:07 s 1 -162139.17 3 +27499.434 7780.0 – C57
2021-01-26 02:44:07 S 05 52 49.992 -72 05 04.38 – V C57
2021-01-26 02:44:07 s 1 -161633.21 3 +26575.330 3680.0 – C57
2021-01-26 02:54:07 S 05 52 48.984 -72 05 18.24 – V C57
2021-01-26 02:54:07 s 1 -161122.21 3 +25650.402 490.0 – C57
2021-01-26 03:04:07 S 05 52 47.731 -72 05 31.78 – V C57
2021-01-26 03:04:07 s 1 -160606.13 0 +24724.670 8120.0 – C57
2021-01-26 03:14:07 S 05 52 46.253 -72 05 45.60 – V C57
2021-01-26 03:14:07 s 1 -160084.91 9 +23798.153 6500.0 – C57
2021-01-26 03:24:07 S 05 52 44.892 -72 05 58.99 – V C57
2021-01-26 03:24:07 s 1 -159558.53 5 +22870.871 5530.0 – C57
2021-01-26 03:34:07 S 05 52 43.608 -72 06 11.84 – V C57
2021-01-26 03:34:07 s 1 -159026.93 3 +21942.846 5150.0 – C57
2021-01-26 03:44:07 S 05 52 42.775 -72 06 27.54 – V C57
2021-01-26 03:44:07 s 1 -158490.06 5 +21014.098 5260.0 – C57
2021-01-26 03:54:07 S 05 52 40.997 -72 06 41.62 – V C57
2021-01-26 03:54:07 s 1 -157947.88 7 +20084.651 5770.0 – 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)