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
2021-01-30 05:30:54 C 05 35 36.55 -74 44 28.0 – q 834
2021-01-30 05:34:07 S 05 36 52.342 -74 59 19.57 – V C57
2021-01-30 05:34:07 s 1 +117798.67 9 +282284.56 6130.0 – C57
2021-01-30 05:44:07 S 05 36 49.440 -74 59 37.68 – V C57
2021-01-30 05:44:07 s 1 +117527.89 7 +282787.02 650.0 – C57
2021-01-30 05:54:07 S 05 36 47.167 -74 59 54.82 – V C57
2021-01-30 05:54:07 s 1 +117256.53 0 +283288.08 4060.0 – C57
2021-01-30 06:04:07 S 05 36 44.786 -75 00 11.74 – V C57
2021-01-30 06:04:07 s 1 +116984.58 2 +283787.73 6370.0 – C57
2021-01-30 06:14:07 S 05 36 42.058 -75 00 29.95 – V C57
2021-01-30 06:14:07 s 1 +116712.05 6 +284285.97 7590.0 – C57
2021-01-30 06:24:07 S 05 36 39.888 -75 00 46.55 – V C57
2021-01-30 06:24:07 s 1 +116438.95 5 +284782.81 7730.0 – C57
2021-01-30 06:34:07 S 05 36 37.512 -75 01 06.60 – V C57
2021-01-30 06:34:07 s 1 +116165.28 3 +285278.25 6800.0 – C57
2021-01-30 06:44:07 S 05 36 34.634 -75 01 22.19 – V C57
2021-01-30 06:44:07 s 1 +115891.04 2 +285772.30 4790.0 – C57
2021-01-30 06:54:07 S 05 36 31.958 -75 01 41.16 – V C57
2021-01-30 06:54:07 s 1 +115616.23 8 +286264.94 1710.0 – C57
2021-01-30 07:04:07 S 05 36 29.323 -75 01 58.80 – V C57
2021-01-30 07:04:07 s 1 +115340.87 1 +286756.19 7570.0 – C57
2021-01-30 07:14:07 S 05 36 26.779 -75 02 15.07 – V C57
2021-01-30 07:14:07 s 1 +115064.94 6 +287246.05 2380.0 – C57
2021-01-30 07:24:07 S 05 36 24.293 -75 02 32.28 – V C57
2021-01-30 07:24:07 s 1 +114788.46 7 +287734.53 6140.0 – C57
2021-01-30 07:34:07 S 05 36 21.722 -75 02 50.35 – V C57
2021-01-30 07:34:07 s 1 +114511.43 5 +288221.61 8860.0 – C57
2021-01-30 07:44:07 S 05 36 19.063 -75 03 08.14 – V C57
2021-01-30 07:44:07 s 1 +114233.85 5 +288707.31 540.0 – C57
2021-01-30 07:54:07 S 05 36 16.747 -75 03 25.16 – V C57
2021-01-30 07:54:07 s 1 +113955.72 9 +289191.63 1190.0 – C57
2021-01-30 08:04:07 S 05 36 14.218 -75 03 42.19 – V C57
2021-01-30 08:04:07 s 1 +113677.06 0 +289674.57 810.0 – C57
2021-01-30 08:14:07 S 05 36 11.414 -75 04 00.52 – V C57
2021-01-30 08:14:07 s 1 +113397.85 3 +290156.13 9410.0 – C57
2021-01-30 08:24:07 S 05 36 09.007 -75 04 17.98 – V C57
2021-01-30 08:24:07 s 1 +113118.10 9 +290636.32 7000.0 – C57
2021-01-30 08:34:07 S 05 36 06.331 -75 04 34.64 – V C57
2021-01-30 08:34:07 s 1 +112837.83 1 +291115.13 3580.0 – C57
2021-01-30 08:44:07 S 05 36 03.821 -75 04 52.21 – V C57
2021-01-30 08:44:07 s 1 +112557.02 4 +291592.57 9160.0 – C57
2021-01-30 08:54:07 S 05 36 01.397 -75 05 09.02 – V C57
2021-01-30 08:54:07 s 1 +112275.69 0 +292068.64 3740.0 – C57
2021-01-30 09:04:07 S 05 35 58.742 -75 05 28.07 – V C57
2021-01-30 09:04:07 s 1 +111993.83 1 +292543.35 7320.0 – C57
2021-01-30 09:14:07 S 05 35 56.388 -75 05 45.35 – V C57
2021-01-30 09:14:07 s 1 +111711.45 2 +293016.69 9920.0 – C57
2021-01-30 09:24:07 S 05 35 54.053 -75 06 02.52 – V C57
2021-01-30 09:24:07 s 1 +111428.55 4 +293488.67 1540.0 – C57
2021-01-30 09:34:07 S 05 35 51.504 -75 06 18.94 – 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)