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
2021-01-17 04:24:08 s 1 +103671.31 3 +304353.36 5950.0 – C57
2021-01-17 04:34:08 S 06 23 47.748 -66 03 57.46 – V C57
2021-01-17 04:34:08 s 1 +103384.52 8 +304798.76 9490.0 – C57
2021-01-17 04:44:08 S 06 23 46.726 -66 04 18.44 – V C57
2021-01-17 04:44:08 s 1 +103097.28 8 +305242.85 2230.0 – C57
2021-01-17 04:54:08 S 06 23 45.773 -66 04 38.39 – V C57
2021-01-17 04:54:08 s 1 +102809.59 6 +305685.64 4180.0 – C57
2021-01-17 05:04:08 S 06 23 44.460 -66 04 57.54 – V C57
2021-01-17 05:04:08 s 1 +102521.45 5 +306127.12 5340.0 – C57
2021-01-17 05:14:08 S 06 23 43.193 -66 05 16.76 – V C57
2021-01-17 05:14:08 s 1 +102232.86 5 +306567.30 5710.0 – C57
2021-01-17 05:24:08 S 06 23 42.043 -66 05 36.42 – V C57
2021-01-17 05:24:08 s 1 +101943.83 2 +307006.18 5300.0 – C57
2021-01-17 05:54:08 S 06 23 38.590 -66 06 36.32 – V C57
2021-01-17 05:54:08 s 1 +101074.08 7 +308315.04 9430.0 – C57
2021-01-17 06:04:08 S 06 23 37.366 -66 06 54.79 – V C57
2021-01-17 06:04:08 s 1 +100783.29 9 +308748.74 5940.0 – C57
2021-01-17 06:14:08 S 06 23 36.192 -66 07 15.35 – V C57
2021-01-17 06:14:08 s 1 +100492.07 8 +309181.16 1690.0 – C57
2021-01-17 06:24:08 S 06 23 35.357 -66 07 35.00 – V C57
2021-01-17 06:24:08 s 1 +100200.42 8 +309612.28 6680.0 – C57
2021-01-17 06:34:08 S 06 23 34.085 -66 07 54.59 – V C57
2021-01-17 06:34:08 s 1 +99908.350 0 +310042.12 920.0 – C57
2021-01-17 06:44:08 S 06 23 32.789 -66 08 14.53 – V C57
2021-01-17 06:44:08 s 1 +99615.848 0 +310470.68 4420.0 – C57
2021-01-17 06:54:08 S 06 23 31.522 -66 08 34.26 – V C57
2021-01-17 06:54:08 s 1 +99322.922 0 +310897.96 7170.0 – C57
2021-01-17 07:04:08 S 06 23 30.360 -66 08 54.02 – V C57
2021-01-17 07:04:08 s 1 +99029.576 0 +311323.95 9180.0 – C57
2021-01-17 07:14:08 S 06 23 29.395 -66 09 13.54 – V C57
2021-01-17 07:14:08 s 1 +98735.812 0 +311748.67 460.0 – C57
2021-01-17 07:24:08 S 06 23 28.078 -66 09 33.98 – V C57
2021-01-17 07:24:08 s 1 +98441.633 0 +312172.11 1000.0 – C57
2021-01-17 07:34:08 S 06 23 26.947 -66 09 54.00 – V C57
2021-01-17 07:34:08 s 1 +98147.040 0 +312594.28 820.0 – C57
2021-01-17 07:44:08 S 06 23 25.867 -66 10 12.40 – V C57
2021-01-17 07:44:08 s 1 +97852.036 0 +313015.18 9910.0 – C57
2021-01-17 07:54:08 S 06 23 24.790 -66 10 32.41 – V C57
2021-01-17 07:54:08 s 1 +97556.624 0 +313434.81 8290.0 – C57
2021-01-17 08:04:08 S 06 23 23.678 -66 10 53.44 – V C57
2021-01-17 08:04:08 s 1 +97260.805 0 +313853.17 5950.0 – C57
2021-01-17 08:14:08 S 06 23 22.435 -66 11 12.19 – V C57
2021-01-17 08:14:08 s 1 +96964.583 0 +314270.26 2890.0 – C57
2021-01-17 08:24:08 S 06 23 21.185 -66 11 31.60 – V C57
2021-01-17 08:24:08 s 1 +96667.958 0 +314686.09 9140.0 – C57
2021-01-17 08:34:08 S 06 23 19.877 -66 11 51.94 – V C57
2021-01-17 08:34:08 s 1 +96370.935 0 +315100.65 4670.0 – C57
2021-01-17 08:44:08 S 06 23 18.840 -66 12 12.35 – V C57
2021-01-17 08:44:08 s 1 +96073.514 0 +315513.96 9510.0 – C57
2021-01-17 08:54:08 S 06 23 17.885 -66 12 31.86 – 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)