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
2021-01-03 02:24:08 S 06 49 58.639 -54 34 53.26 – V C57
2021-01-03 02:24:08 s 1 +134926.37 8 +270663.92 2320.0 – C57
2021-01-03 02:34:08 S 06 49 57.955 -54 35 16.44 – V C57
2021-01-03 02:34:08 s 1 +134694.60 4 +271209.43 9620.0 – C57
2021-01-03 02:44:08 S 06 49 57.468 -54 35 41.14 – V C57
2021-01-03 02:44:08 s 1 +134462.13 7 +271753.54 5960.0 – C57
2021-01-03 02:54:08 S 06 49 57.086 -54 36 04.18 – V C57
2021-01-03 02:54:08 s 1 +134228.98 1 +272296.26 1360.0 – C57
2021-01-03 03:04:08 S 06 49 56.443 -54 36 27.65 – V C57
2021-01-03 03:04:08 s 1 +133995.14 0 +272837.59 5830.0 – C57
2021-01-03 03:14:08 S 06 49 55.586 -54 36 51.59 – V C57
2021-01-03 03:14:08 s 1 +133760.61 8 +273377.53 9360.0 – C57
2021-01-03 03:24:08 S 06 49 55.087 -54 37 16.32 – V C57
2021-01-03 03:24:08 s 1 +133525.41 8 +273916.09 1970.0 – C57
2021-01-03 03:34:08 S 06 49 54.648 -54 37 41.27 – V C57
2021-01-03 03:34:08 s 1 +133289.54 4 +274453.25 3650.0 – C57
2021-01-03 03:44:08 S 06 49 53.945 -54 38 04.24 – V C57
2021-01-03 03:44:08 s 1 +133053.00 0 +274989.04 4420.0 – C57
2021-01-03 03:54:08 S 06 49 53.335 -54 38 28.00 – V C57
2021-01-03 03:54:08 s 1 +132815.79 0 +275523.45 4280.0 – C57
2021-01-03 04:04:08 S 06 49 52.795 -54 38 51.72 – V C57
2021-01-03 04:04:08 s 1 +132577.91 6 +276056.48 3230.0 – C57
2021-01-03 04:14:08 S 06 49 52.349 -54 39 16.13 – V C57
2021-01-03 04:14:08 s 1 +132339.38 4 +276588.13 1280.0 – C57
2021-01-03 04:24:08 S 06 49 51.605 -54 39 39.42 – V C57
2021-01-03 04:24:08 s 1 +132100.19 6 +277118.41 8430.0 – C57
2021-01-03 04:34:08 S 06 49 50.899 -54 40 03.72 – V C57
2021-01-03 04:34:08 s 1 +131860.35 6 +277647.33 4700.0 – C57
2021-01-03 04:44:08 S 06 49 50.424 -54 40 26.90 – V C57
2021-01-03 04:44:08 s 1 +131619.86 7 +278174.87 80.0 – C57
2021-01-03 04:54:08 S 06 49 49.836 -54 40 50.27 – V C57
2021-01-03 04:54:08 s 1 +131378.73 3 +278701.05 4570.0 – C57
2021-01-03 05:04:08 S 06 49 49.349 -54 41 14.28 – V C57
2021-01-03 05:04:08 s 1 +131136.95 8 +279225.87 8190.0 – C57
2021-01-03 05:14:08 S 06 49 48.581 -54 41 38.08 – V C57
2021-01-03 05:14:08 s 1 +130894.54 5 +279749.32 940.0 – C57
2021-01-03 05:24:08 S 06 49 47.741 -54 42 02.09 – V C57
2021-01-03 05:24:08 s 1 +130651.49 7 +280271.42 2830.0 – C57
2021-01-03 05:34:08 S 06 49 47.402 -54 42 26.14 – V C57
2021-01-03 05:34:08 s 1 +130407.81 8 +280792.16 3850.0 – C57
2021-01-03 05:44:08 S 06 49 46.824 -54 42 49.79 – V C57
2021-01-03 05:44:08 s 1 +130163.51 2 +281311.55 4020.0 – C57
2021-01-03 05:54:08 S 06 49 46.234 -54 43 14.05 – V C57
2021-01-03 05:54:08 s 1 +129918.58 1 +281829.59 3330.0 – C57
2021-01-03 06:04:08 S 06 49 45.487 -54 43 37.60 – V C57
2021-01-03 06:04:08 s 1 +129673.03 0 +282346.27 1800.0 – C57
2021-01-03 06:14:08 S 06 49 44.940 -54 44 01.03 – V C57
2021-01-03 06:14:08 s 1 +129426.86 1 +282861.62 9420.0 – C57
2021-01-03 06:24:08 S 06 49 44.467 -54 44 24.54 – V C57
2021-01-03 06:24:08 s 1 +129180.07 8 +283375.61 6210.0 – 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)