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
2021-01-16 14:24:08 s 1 +125838.23 7 +262039.80 9320.0 – C57
2021-01-16 14:34:08 S 06 25 22.260 -65 35 53.70 – V C57
2021-01-16 14:34:08 s 1 +125600.57 4 +262603.40 8490.0 – C57
2021-01-16 14:44:08 S 06 25 21.144 -65 36 13.86 – V C57
2021-01-16 14:44:08 s 1 +125362.17 4 +263165.48 6400.0 – C57
2021-01-16 14:54:08 S 06 25 20.230 -65 36 34.52 – V C57
2021-01-16 14:54:08 s 1 +125123.04 3 +263726.05 3030.0 – C57
2021-01-16 15:04:08 S 06 25 19.138 -65 36 53.96 – V C57
2021-01-16 15:04:08 s 1 +124883.18 5 +264285.10 8400.0 – C57
2021-01-16 15:14:08 S 06 25 17.993 -65 37 13.01 – V C57
2021-01-16 15:14:08 s 1 +124642.60 4 +264842.65 2520.0 – C57
2021-01-16 15:24:08 S 06 25 16.426 -65 37 34.68 – V C57
2021-01-16 15:24:08 s 1 +124401.30 3 +265398.69 5380.0 – C57
2021-01-16 15:34:08 S 06 25 16.082 -65 37 54.70 – V C57
2021-01-16 15:34:08 s 1 +124159.28 8 +265953.23 7010.0 – C57
2021-01-16 15:44:08 S 06 25 14.854 -65 38 15.47 – V C57
2021-01-16 15:44:08 s 1 +123916.56 3 +266506.26 7410.0 – C57
2021-01-16 15:54:08 S 06 25 13.584 -65 38 35.74 – V C57
2021-01-16 15:54:08 s 1 +123673.13 2 +267057.81 6570.0 – C57
2021-01-16 16:04:08 S 06 25 12.439 -65 38 55.10 – V C57
2021-01-16 16:04:08 s 1 +123428.99 8 +267607.85 4520.0 – C57
2021-01-16 16:14:08 S 06 25 11.160 -65 39 15.44 – V C57
2021-01-16 16:14:08 s 1 +123184.16 6 +268156.41 1260.0 – C57
2021-01-16 16:24:08 S 06 25 10.382 -65 39 37.15 – V C57
2021-01-16 16:24:08 s 1 +122938.64 1 +268703.48 6790.0 – C57
2021-01-16 16:34:08 S 06 25 09.329 -65 39 56.92 – V C57
2021-01-16 16:34:08 s 1 +122692.42 5 +269249.06 1120.0 – C57
2021-01-16 16:44:08 S 06 25 07.980 -65 40 17.00 – V C57
2021-01-16 16:44:08 s 1 +122445.52 4 +269793.16 4260.0 – C57
2021-01-16 16:54:08 S 06 25 06.838 -65 40 36.91 – V C57
2021-01-16 16:54:08 s 1 +122197.94 1 +270335.78 6220.0 – C57
2021-01-16 17:04:08 S 06 25 05.962 -65 40 57.18 – V C57
2021-01-16 17:04:08 s 1 +121949.67 9 +270876.93 6990.0 – C57
2021-01-16 17:14:08 S 06 25 04.733 -65 41 18.42 – V C57
2021-01-16 17:14:08 s 1 +121700.74 4 +271416.60 6600.0 – C57
2021-01-16 17:24:08 S 06 25 03.667 -65 41 37.64 – V C57
2021-01-16 17:24:08 s 1 +121451.13 9 +271954.80 5040.0 – C57
2021-01-16 17:34:08 S 06 25 02.527 -65 41 58.31 – V C57
2021-01-16 17:34:08 s 1 +121200.86 7 +272491.53 2330.0 – C57
2021-01-16 17:44:08 S 06 25 01.570 -65 42 17.82 – V C57
2021-01-16 17:44:08 s 1 +120949.93 3 +273026.80 8460.0 – C57
2021-01-16 17:54:08 S 06 25 00.406 -65 42 38.45 – V C57
2021-01-16 17:54:08 s 1 +120698.34 1 +273560.60 3440.0 – C57
2021-01-16 18:04:08 S 06 24 59.196 -65 42 57.85 – V C57
2021-01-16 18:04:08 s 1 +120446.09 3 +274092.94 7290.0 – C57
2021-01-16 18:14:08 S 06 24 58.051 -65 43 17.94 – V C57
2021-01-16 18:14:08 s 1 +120193.19 5 +274623.83 10.0 – C57
2021-01-16 18:24:08 S 06 24 57.125 -65 43 38.86 – V C57
2021-01-16 18:24:08 s 1 +119939.65 0 +275153.26 1600.0 – C57
2021-01-16 18:34:08 S 06 24 55.939 -65 43 58.84 – 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)