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
2021-01-09 05:04:08 s 1 -139670.74 8 +347699.48 5150.0 – C57
2021-01-09 05:14:08 S 06 38 53.110 -59 56 38.29 – V C57
2021-01-09 05:14:08 s 1 -139932.49 3 +347387.46 5710.0 – C57
2021-01-09 05:24:08 S 06 38 52.378 -59 56 58.63 – V C57
2021-01-09 05:24:08 s 1 -140193.85 5 +347074.52 5670.0 – C57
2021-01-09 05:34:08 S 06 38 51.516 -59 57 18.18 – V C57
2021-01-09 05:34:08 s 1 -140454.83 2 +346760.65 5030.0 – C57
2021-01-09 05:44:08 S 06 38 50.592 -59 57 38.59 – V C57
2021-01-09 05:44:08 s 1 -140715.42 2 +346445.85 3800.0 – C57
2021-01-09 05:54:08 S 06 38 49.649 -59 57 58.64 – V C57
2021-01-09 05:54:08 s 1 -140975.62 6 +346130.12 1970.0 – C57
2021-01-09 06:04:08 S 06 38 48.919 -59 58 18.19 – V C57
2021-01-09 06:04:08 s 1 -141235.44 1 +345813.46 9530.0 – C57
2021-01-09 06:14:08 S 06 38 47.909 -59 58 38.78 – V C57
2021-01-09 06:14:08 s 1 -141494.86 5 +345495.87 6500.0 – C57
2021-01-09 06:24:08 S 06 38 47.026 -59 58 58.30 – V C57
2021-01-09 06:24:08 s 1 -141753.89 9 +345177.35 2850.0 – C57
2021-01-09 06:34:08 S 06 38 46.267 -59 59 18.02 – V C57
2021-01-09 06:34:08 s 1 -142012.54 0 +344857.89 8600.0 – C57
2021-01-09 06:44:08 S 06 38 45.434 -59 59 38.26 – V C57
2021-01-09 06:44:08 s 1 -142270.78 7 +344537.51 3740.0 – C57
2021-01-09 06:54:08 S 06 38 44.345 -59 59 58.13 – V C57
2021-01-09 06:54:08 s 1 -142528.64 0 +344216.19 8270.0 – C57
2021-01-09 07:04:08 S 06 38 43.550 -60 00 16.99 – V C57
2021-01-09 07:04:08 s 1 -142786.09 5 +343893.94 2180.0 – C57
2021-01-09 07:14:08 S 06 38 42.727 -60 00 37.15 – V C57
2021-01-09 07:14:08 s 1 -143043.15 3 +343570.75 5470.0 – C57
2021-01-09 07:24:08 S 06 38 41.738 -60 00 56.70 – V C57
2021-01-09 07:24:08 s 1 -143299.81 2 +343246.63 8150.0 – C57
2021-01-09 07:34:08 S 06 38 40.963 -60 01 17.00 – V C57
2021-01-09 07:34:08 s 1 -143556.07 1 +342921.57 200.0 – C57
2021-01-09 07:44:08 S 06 38 40.186 -60 01 35.80 – V C57
2021-01-09 07:44:08 s 1 -143811.92 7 +342595.58 1640.0 – C57
2021-01-09 07:54:08 S 06 38 39.211 -60 01 55.49 – V C57
2021-01-09 07:54:08 s 1 -144067.38 1 +342268.65 2440.0 – C57
2021-01-09 08:04:08 S 06 38 38.311 -60 02 16.19 – V C57
2021-01-09 08:04:08 s 1 -144322.43 0 +341940.78 2620.0 – C57
2021-01-09 08:14:08 S 06 38 37.579 -60 02 35.66 – V C57
2021-01-09 08:14:08 s 1 -144577.07 3 +341611.97 2170.0 – C57
2021-01-09 08:24:08 S 06 38 36.619 -60 02 56.11 – V C57
2021-01-09 08:24:08 s 1 -144831.31 0 +341282.23 1080.0 – C57
2021-01-09 08:34:08 S 06 38 35.710 -60 03 15.88 – V C57
2021-01-09 08:34:08 s 1 -145085.13 7 +340951.55 9360.0 – C57
2021-01-09 08:44:08 S 06 38 34.810 -60 03 34.67 – V C57
2021-01-09 08:44:08 s 1 -145338.55 5 +340619.92 7000.0 – C57
2021-01-09 08:54:08 S 06 38 33.996 -60 03 54.90 – V C57
2021-01-09 08:54:08 s 1 -145591.56 2 +340287.36 4010.0 – C57
2021-01-09 09:04:08 S 06 38 32.974 -60 04 15.02 – V C57
2021-01-09 09:04:08 s 1 -145844.15 6 +339953.86 370.0 – C57
2021-01-09 09:14:08 S 06 38 32.136 -60 04 34.07 – 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)