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
2021-01-07 02:34:08 s 1 -47588.158 0 +401293.80 6620.0 – C57
2021-01-07 02:44:08 S 06 43 08.957 -58 12 31.10 – V C57
2021-01-07 02:44:08 s 1 -47920.452 0 +401247.90 3190.0 – C57
2021-01-07 02:54:08 S 06 43 08.134 -58 12 53.06 – V C57
2021-01-07 02:54:08 s 1 -48252.636 0 +401201.13 9610.0 – C57
2021-01-07 03:04:08 S 06 43 07.236 -58 13 14.02 – V C57
2021-01-07 03:04:08 s 1 -48584.710 0 +401153.51 5870.0 – C57
2021-01-07 03:14:08 S 06 43 06.494 -58 13 35.36 – V C57
2021-01-07 03:14:08 s 1 -48916.673 0 +401105.03 1960.0 – C57
2021-01-07 03:24:08 S 06 43 05.762 -58 13 56.78 – V C57
2021-01-07 03:24:08 s 1 -49248.524 0 +401055.68 7890.0 – C57
2021-01-07 03:34:08 S 06 43 04.874 -58 14 17.95 – V C57
2021-01-07 03:34:08 s 1 -49580.263 0 +401005.48 3660.0 – C57
2021-01-07 03:44:08 S 06 43 04.054 -58 14 38.72 – V C57
2021-01-07 03:44:08 s 1 -49911.889 0 +400954.41 9260.0 – C57
2021-01-07 03:54:08 S 06 43 03.293 -58 15 00.50 – V C57
2021-01-07 03:54:08 s 1 -50243.401 0 +400902.48 4700.0 – C57
2021-01-07 04:04:08 S 06 43 02.422 -58 15 21.64 – V C57
2021-01-07 04:04:08 s 1 -50574.798 0 +400849.69 9960.0 – C57
2021-01-07 04:14:08 S 06 43 01.534 -58 15 43.49 – V C57
2021-01-07 04:14:08 s 1 -50906.079 0 +400796.04 5060.0 – C57
2021-01-07 04:24:08 S 06 43 00.924 -58 16 04.40 – V C57
2021-01-07 04:24:08 s 1 -51237.245 0 +400741.53 9990.0 – C57
2021-01-07 04:34:08 S 06 42 59.993 -58 16 25.90 – V C57
2021-01-07 04:34:08 s 1 -51568.293 0 +400686.16 4750.0 – C57
2021-01-07 04:44:08 S 06 42 59.143 -58 16 46.67 – V C57
2021-01-07 04:44:08 s 1 -51899.225 0 +400629.93 9340.0 – C57
2021-01-07 04:54:08 S 06 42 58.495 -58 17 07.66 – V C57
2021-01-07 04:54:08 s 1 -52230.037 0 +400572.84 3750.0 – C57
2021-01-07 05:04:08 S 06 42 57.485 -58 17 29.29 – V C57
2021-01-07 05:04:08 s 1 -52560.731 0 +400514.88 7990.0 – C57
2021-01-07 05:14:08 S 06 42 56.686 -58 17 51.25 – V C57
2021-01-07 05:14:08 s 1 -52891.305 0 +400456.07 2060.0 – C57
2021-01-07 05:24:08 S 06 42 55.920 -58 18 12.53 – V C57
2021-01-07 05:24:08 s 1 -53221.759 0 +400396.40 5950.0 – C57
2021-01-07 05:34:08 S 06 42 55.118 -58 18 32.76 – V C57
2021-01-07 05:34:08 s 1 -53552.091 0 +400335.86 9660.0 – C57
2021-01-07 05:44:08 S 06 42 54.283 -58 18 54.36 – V C57
2021-01-07 05:44:08 s 1 -53882.301 0 +400274.47 3200.0 – C57
2021-01-07 05:54:08 S 06 42 53.590 -58 19 15.17 – V C57
2021-01-07 05:54:08 s 1 -54212.389 0 +400212.22 6550.0 – C57
2021-01-07 06:04:08 S 06 42 52.646 -58 19 36.98 – V C57
2021-01-07 06:04:08 s 1 -54542.353 0 +400149.10 9730.0 – C57
2021-01-07 06:14:08 S 06 42 51.869 -58 19 57.54 – V C57
2021-01-07 06:14:08 s 1 -54872.194 0 +400085.13 2720.0 – C57
2021-01-07 06:24:08 S 06 42 51.216 -58 20 18.31 – V C57
2021-01-07 06:24:08 s 1 -55201.909 0 +400020.30 5530.0 – C57
2021-01-07 06:34:08 S 06 42 50.350 -58 20 39.70 – V C57
2021-01-07 06:34:08 s 1 -55531.499 0 +399954.60 8160.0 – C57
2021-01-07 06:44:08 S 06 42 49.490 -58 21 02.95 – 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)