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
2020-12-26 00:34:08 S 06 57 37.874 -47 06 26.93 – V C57
2020-12-26 00:34:08 s 1 -121207.65 5 +367188.68 300.0 – C57
2020-12-26 00:44:08 S 06 57 37.452 -47 06 50.58 – V C57
2020-12-26 00:44:08 s 1 -121499.41 7 +366934.69 2700.0 – C57
2020-12-26 00:54:08 S 06 57 36.926 -47 07 15.31 – V C57
2020-12-26 00:54:08 s 1 -121790.87 5 +366679.78 4620.0 – C57
2020-12-26 01:04:08 S 06 57 36.420 -47 07 39.14 – V C57
2020-12-26 01:04:08 s 1 -122082.02 8 +366423.97 6060.0 – C57
2020-12-26 01:14:08 S 06 57 35.998 -47 08 04.13 – V C57
2020-12-26 01:14:08 s 1 -122372.87 5 +366167.25 7020.0 – C57
2020-12-26 01:24:08 S 06 57 35.640 -47 08 28.03 – V C57
2020-12-26 01:24:08 s 1 -122663.41 4 +365909.62 7500.0 – C57
2020-12-26 01:34:08 S 06 57 34.961 -47 08 52.48 – V C57
2020-12-26 01:34:08 s 1 -122953.64 5 +365651.08 7500.0 – C57
2020-12-26 01:44:08 S 06 57 34.594 -47 09 16.88 – V C57
2020-12-26 01:44:08 s 1 -123243.56 6 +365391.63 7010.0 – C57
2020-12-26 01:54:08 S 06 57 34.152 -47 09 41.18 – V C57
2020-12-26 01:54:08 s 1 -123533.17 6 +365131.27 6030.0 – C57
2020-12-26 02:04:08 S 06 57 33.744 -47 10 04.33 – V C57
2020-12-26 02:04:08 s 1 -123822.47 4 +364870.00 4570.0 – C57
2020-12-26 02:14:08 S 06 57 33.182 -47 10 28.52 – V C57
2020-12-26 02:14:08 s 1 -124111.45 9 +364607.82 2610.0 – C57
2020-12-26 02:24:08 S 06 57 32.705 -47 10 52.93 – V C57
2020-12-26 02:24:08 s 1 -124400.13 0 +364344.72 170.0 – C57
2020-12-26 02:34:08 S 06 57 32.230 -47 11 18.28 – V C57
2020-12-26 02:34:08 s 1 -124688.48 6 +364080.71 7230.0 – C57
2020-12-26 02:44:08 S 06 57 31.834 -47 11 41.64 – V C57
2020-12-26 02:44:08 s 1 -124976.52 6 +363815.79 3790.0 – C57
2020-12-26 02:54:08 S 06 57 31.313 -47 12 05.87 – V C57
2020-12-26 02:54:08 s 1 -125264.24 8 +363549.96 9860.0 – C57
2020-12-26 03:04:08 S 06 57 30.965 -47 12 29.41 – V C57
2020-12-26 03:04:08 s 1 -125551.65 1 +363283.21 5430.0 – C57
2020-12-26 03:14:08 S 06 57 30.434 -47 12 55.37 – V C57
2020-12-26 03:14:08 s 1 -125838.73 4 +363015.55 500.0 – C57
2020-12-26 03:24:08 S 06 57 29.897 -47 13 18.12 – V C57
2020-12-26 03:24:08 s 1 -126125.49 7 +362746.97 5070.0 – C57
2020-12-26 03:34:08 S 06 57 29.383 -47 13 42.74 – V C57
2020-12-26 03:34:08 s 1 -126411.93 8 +362477.48 9130.0 – C57
2020-12-26 03:44:08 S 06 57 28.843 -47 14 08.05 – V C57
2020-12-26 03:44:08 s 1 -126698.05 5 +362207.07 2690.0 – C57
2020-12-26 03:54:08 S 06 57 28.500 -47 14 31.09 – V C57
2020-12-26 03:54:08 s 1 -126983.84 8 +361935.75 5750.0 – C57
2020-12-26 04:04:08 S 06 57 28.015 -47 14 56.08 – V C57
2020-12-26 04:04:08 s 1 -127269.31 6 +361663.51 8300.0 – C57
2020-12-26 04:14:08 S 06 57 27.545 -47 15 18.83 – V C57
2020-12-26 04:14:08 s 1 -127554.45 7 +361390.35 330.0 – C57
2020-12-26 04:24:08 S 06 57 26.940 -47 15 43.85 – V C57
2020-12-26 04:24:08 s 1 -127839.27 0 +361116.27 1860.0 – C57
2020-12-26 04:34:08 S 06 57 26.580 -47 16 08.29 – V C57
2020-12-26 04:34:08 s 1 -128123.75 4 +360841.28 2870.0 – 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)