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
2020-12-28 03:14:08 S 06 55 09.929 -49 06 03.31 – V C57
2020-12-28 03:14:08 s 1 -189282.55 1 +245331.25 7160.0 – C57
2020-12-28 03:24:08 S 06 55 09.425 -49 06 26.50 – V C57
2020-12-28 03:24:08 s 1 -189408.44 4 +244769.67 7490.0 – C57
2020-12-28 03:34:08 S 06 55 09.031 -49 06 49.03 – V C57
2020-12-28 03:34:08 s 1 -189533.42 1 +244206.93 6450.0 – C57
2020-12-28 03:44:08 S 06 55 08.515 -49 07 12.58 – V C57
2020-12-28 03:44:08 s 1 -189657.47 9 +243643.02 4030.0 – C57
2020-12-28 03:54:08 S 06 55 07.966 -49 07 35.36 – V C57
2020-12-28 03:54:08 s 1 -189780.61 3 +243077.95 220.0 – C57
2020-12-28 04:04:08 S 06 55 07.411 -49 07 58.04 – V C57
2020-12-28 04:04:08 s 1 -189902.82 0 +242511.70 5020.0 – C57
2020-12-28 04:14:08 S 06 55 07.046 -49 08 20.54 – V C57
2020-12-28 04:14:08 s 1 -190024.09 5 +241944.28 8420.0 – C57
2020-12-28 04:24:08 S 06 55 06.547 -49 08 43.26 – V C57
2020-12-28 04:24:08 s 1 -190144.43 6 +241375.68 420.0 – C57
2020-12-28 04:34:08 S 06 55 05.921 -49 09 07.24 – V C57
2020-12-28 04:34:08 s 1 -190263.83 7 +240805.91 1010.0 – C57
2020-12-28 04:44:08 S 06 55 05.518 -49 09 30.42 – V C57
2020-12-28 04:44:08 s 1 -190382.29 5 +240234.97 180.0 – C57
2020-12-28 04:54:08 S 06 55 04.946 -49 09 51.80 – V C57
2020-12-28 04:54:08 s 1 -190499.80 7 +239662.84 7930.0 – C57
2020-12-28 05:04:08 S 06 55 04.493 -49 10 15.28 – V C57
2020-12-28 05:04:08 s 1 -190616.36 7 +239089.54 4250.0 – C57
2020-12-28 05:14:08 S 06 55 03.965 -49 10 38.35 – V C57
2020-12-28 05:14:08 s 1 -190731.97 3 +238515.06 9140.0 – C57
2020-12-28 05:24:08 S 06 55 03.497 -49 11 01.18 – V C57
2020-12-28 05:24:08 s 1 -190846.61 9 +237939.39 2590.0 – C57
2020-12-28 05:34:08 S 06 55 02.942 -49 11 23.71 – V C57
2020-12-28 05:34:08 s 1 -190960.30 3 +237362.54 4590.0 – C57
2020-12-28 05:44:08 S 06 55 02.566 -49 11 45.82 – V C57
2020-12-28 05:44:08 s 1 -191073.01 9 +236784.51 5150.0 – C57
2020-12-28 05:54:08 S 06 55 01.937 -49 12 08.86 – V C57
2020-12-28 05:54:08 s 1 -191184.76 4 +236205.28 4240.0 – C57
2020-12-28 06:04:08 S 06 55 01.543 -49 12 32.08 – V C57
2020-12-28 06:04:08 s 1 -191295.53 3 +235624.87 1870.0 – C57
2020-12-28 06:14:08 S 06 55 01.140 -49 12 54.07 – V C57
2020-12-28 06:14:08 s 1 -191405.32 3 +235043.28 8030.0 – C57
2020-12-28 06:24:08 S 06 55 00.509 -49 13 18.59 – V C57
2020-12-28 06:24:08 s 1 -191514.13 0 +234460.49 2710.0 – C57
2020-12-28 06:34:08 S 06 54 59.954 -49 13 39.72 – V C57
2020-12-28 06:34:08 s 1 -191621.94 8 +233876.50 5920.0 – C57
2020-12-28 06:44:08 S 06 54 59.484 -49 14 02.80 – V C57
2020-12-28 06:44:08 s 1 -191728.77 4 +233291.33 7630.0 – C57
2020-12-28 06:54:08 S 06 54 58.985 -49 14 26.09 – V C57
2020-12-28 06:54:08 s 1 -191834.60 3 +232704.95 7840.0 – C57
2020-12-28 07:04:08 S 06 54 58.538 -49 14 49.81 – V C57
2020-12-28 07:04:08 s 1 -191939.43 2 +232117.38 6560.0 – C57
2020-12-28 07:14:08 S 06 54 57.972 -49 15 11.52 – V C57
2020-12-28 07:14:08 s 1 -192043.25 6 +231528.62 3760.0 – 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)