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
2021-01-28 10:54:07 s 1 +151424.65 2 +98364.005 9850.0 – C57
2021-01-28 11:04:07 S 05 46 22.370 -73 41 11.83 – V C57
2021-01-28 11:04:07 s 1 +151543.85 6 +99338.243 2940.0 – C57
2021-01-28 11:14:07 S 05 46 20.640 -73 41 31.42 – V C57
2021-01-28 11:14:07 s 1 +151659.52 8 +100310.15 9590.0 – C57
2021-01-28 11:24:07 S 05 46 18.773 -73 41 49.74 – V C57
2021-01-28 11:24:07 s 1 +151771.70 2 +101279.75 9840.0 – C57
2021-01-28 11:34:07 S 05 46 16.855 -73 42 08.60 – V C57
2021-01-28 11:34:07 s 1 +151880.40 9 +102247.03 3760.0 – C57
2021-01-28 11:44:07 S 05 46 15.043 -73 42 28.62 – V C57
2021-01-28 11:44:07 s 1 +151985.68 3 +103211.99 1410.0 – C57
2021-01-28 11:54:07 S 05 46 12.934 -73 42 47.09 – V C57
2021-01-28 11:54:07 s 1 +152087.55 5 +104174.63 2840.0 – C57
2021-01-28 12:04:07 S 05 46 11.198 -73 43 06.46 – V C57
2021-01-28 12:04:07 s 1 +152186.05 8 +105134.96 8110.0 – C57
2021-01-28 12:14:07 S 05 46 09.163 -73 43 26.44 – V C57
2021-01-28 12:14:07 s 1 +152281.22 2 +106092.97 7280.0 – C57
2021-01-28 12:24:07 S 05 46 07.291 -73 43 44.90 – V C57
2021-01-28 12:24:07 s 1 +152373.07 8 +107048.68 410.0 – C57
2021-01-28 12:34:07 S 05 46 05.210 -73 44 04.49 – V C57
2021-01-28 12:34:07 s 1 +152461.65 8 +108002.07 7540.0 – C57
2021-01-28 12:44:07 S 05 46 03.487 -73 44 23.89 – V C57
2021-01-28 12:44:07 s 1 +152546.99 0 +108953.16 8750.0 – C57
2021-01-28 12:54:07 S 05 46 01.543 -73 44 43.55 – V C57
2021-01-28 12:54:07 s 1 +152629.10 5 +109901.95 4060.0 – C57
2021-01-28 13:04:07 S 05 45 59.482 -73 45 01.33 – V C57
2021-01-28 13:04:07 s 1 +152708.03 2 +110848.43 3550.0 – C57
2021-01-28 13:14:07 S 05 45 57.696 -73 45 22.54 – V C57
2021-01-28 13:14:07 s 1 +152783.80 0 +111792.62 7270.0 – C57
2021-01-28 13:24:07 S 05 45 55.862 -73 45 40.50 – V C57
2021-01-28 13:24:07 s 1 +152856.43 9 +112734.51 5260.0 – C57
2021-01-28 13:34:07 S 05 45 53.710 -73 45 58.72 – V C57
2021-01-28 13:34:07 s 1 +152925.97 5 +113674.10 7580.0 – C57
2021-01-28 13:44:07 S 05 45 51.737 -73 46 19.34 – V C57
2021-01-28 13:44:07 s 1 +152992.43 8 +114611.41 4280.0 – C57
2021-01-28 13:54:07 S 05 45 49.966 -73 46 39.32 – V C57
2021-01-28 13:54:07 s 1 +153055.85 4 +115546.42 5400.0 – C57
2021-01-28 14:04:07 S 05 45 48.048 -73 46 57.29 – V C57
2021-01-28 14:04:07 s 1 +153116.25 2 +116479.15 1000.0 – C57
2021-01-28 14:14:07 S 05 45 45.761 -73 47 16.33 – V C57
2021-01-28 14:14:07 s 1 +153173.65 7 +117409.60 1130.0 – C57
2021-01-28 14:24:07 S 05 45 44.107 -73 47 35.38 – V C57
2021-01-28 14:24:07 s 1 +153228.09 8 +118337.77 5840.0 – C57
2021-01-28 14:34:07 S 05 45 42.019 -73 47 54.20 – V C57
2021-01-28 14:34:07 s 1 +153279.59 9 +119263.66 5170.0 – C57
2021-01-28 14:44:07 S 05 45 40.181 -73 48 13.75 – V C57
2021-01-28 14:44:07 s 1 +153328.18 7 +120187.29 9170.0 – C57
2021-01-28 14:54:07 S 05 45 37.992 -73 48 34.96 – V C57
2021-01-28 14:54:07 s 1 +153373.88 9 +121108.64 7880.0 – C57
2021-01-28 15:04:07 S 05 45 36.098 -73 48 52.52 – 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)