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
2021-01-04 05:04:08 S 06 48 18.091 -55 37 35.98 – V C57
2021-01-04 05:04:08 s 1 +91083.170 0 +341600.76 8220.0 – C57
2021-01-04 05:14:08 S 06 48 17.566 -55 37 59.12 – V C57
2021-01-04 05:14:08 s 1 +90776.985 0 +341948.43 4630.0 – C57
2021-01-04 05:24:08 S 06 48 16.745 -55 38 22.63 – V C57
2021-01-04 05:24:08 s 1 +90470.508 0 +342294.99 650.0 – C57
2021-01-04 05:34:08 S 06 48 16.126 -55 38 45.89 – V C57
2021-01-04 05:34:08 s 1 +90163.741 0 +342640.45 6280.0 – C57
2021-01-04 05:44:08 S 06 48 15.566 -55 39 08.78 – V C57
2021-01-04 05:44:08 s 1 +89856.687 0 +342984.81 1530.0 – C57
2021-01-04 05:54:08 S 06 48 14.801 -55 39 31.43 – V C57
2021-01-04 05:54:08 s 1 +89549.346 0 +343328.06 6390.0 – C57
2021-01-04 06:04:08 S 06 48 14.191 -55 39 54.65 – V C57
2021-01-04 06:04:08 s 1 +89241.720 0 +343670.22 870.0 – C57
2021-01-04 06:14:08 S 06 48 13.481 -55 40 18.26 – V C57
2021-01-04 06:14:08 s 1 +88933.811 0 +344011.27 4970.0 – C57
2021-01-04 06:24:08 S 06 48 12.893 -55 40 41.63 – V C57
2021-01-04 06:24:08 s 1 +88625.620 0 +344351.23 8690.0 – C57
2021-01-04 06:34:08 S 06 48 12.146 -55 41 04.45 – V C57
2021-01-04 06:34:08 s 1 +88317.149 0 +344690.08 2040.0 – C57
2021-01-04 06:44:08 S 06 48 11.491 -55 41 27.28 – V C57
2021-01-04 06:44:08 s 1 +88008.400 0 +345027.85 5020.0 – C57
2021-01-04 06:54:08 S 06 48 10.901 -55 41 50.53 – V C57
2021-01-04 06:54:08 s 1 +87699.374 0 +345364.52 7620.0 – C57
2021-01-04 07:04:08 S 06 48 10.049 -55 42 14.40 – V C57
2021-01-04 07:04:08 s 1 +87390.073 0 +345700.09 9860.0 – C57
2021-01-04 07:14:08 S 06 48 09.485 -55 42 37.30 – V C57
2021-01-04 07:14:08 s 1 +87080.498 0 +346034.58 1730.0 – C57
2021-01-04 07:24:08 S 06 48 08.954 -55 42 59.83 – V C57
2021-01-04 07:24:08 s 1 +86770.651 0 +346367.97 3230.0 – C57
2021-01-04 07:34:08 S 06 48 08.081 -55 43 22.37 – V C57
2021-01-04 07:34:08 s 1 +86460.534 0 +346700.27 4380.0 – C57
2021-01-04 07:44:08 S 06 48 07.474 -55 43 46.31 – V C57
2021-01-04 07:44:08 s 1 +86150.147 0 +347031.49 5160.0 – C57
2021-01-04 07:54:08 S 06 48 06.929 -55 44 08.92 – V C57
2021-01-04 07:54:08 s 1 +85839.493 0 +347361.61 5590.0 – C57
2021-01-04 08:04:08 S 06 48 06.110 -55 44 32.89 – V C57
2021-01-04 08:04:08 s 1 +85528.573 0 +347690.66 5660.0 – C57
2021-01-04 08:14:08 S 06 48 05.453 -55 44 55.18 – V C57
2021-01-04 08:14:08 s 1 +85217.389 0 +348018.61 5370.0 – C57
2021-01-04 08:24:08 S 06 48 04.819 -55 45 18.22 – V C57
2021-01-04 08:24:08 s 1 +84905.942 0 +348345.49 4740.0 – C57
2021-01-04 08:34:08 S 06 48 04.260 -55 45 41.15 – V C57
2021-01-04 08:34:08 s 1 +84594.233 0 +348671.28 3750.0 – C57
2021-01-04 08:44:08 S 06 48 03.418 -55 46 04.08 – V C57
2021-01-04 08:44:08 s 1 +84282.265 0 +348995.99 2420.0 – C57
2021-01-04 08:54:08 S 06 48 03.185 -55 46 29.10 – V C57
2021-01-04 08:54:08 s 1 +83970.038 0 +349319.62 740.0 – C57
2021-01-04 09:04:08 S 06 48 02.508 -55 46 48.29 – V C57
2021-01-04 09:04:08 s 1 +83657.555 0 +349642.18 8720.0 – 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)