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
2021-01-31 23:34:07 s 1 +37588.005 0 +369236.16 140.0 – C57
2021-01-31 23:44:07 S 05 25 14.455 -76 10 24.82 – V C57
2021-01-31 23:44:07 s 1 +37241.447 0 +369437.95 5760.0 – C57
2021-01-31 23:54:07 S 05 25 11.189 -76 10 40.69 – V C57
2021-01-31 23:54:07 s 1 +36894.786 0 +369638.70 1130.0 – C57
2021-02-01 00:04:07 S 05 25 08.443 -76 10 59.05 – V C57
2021-02-01 00:04:07 s 1 +36548.022 0 +369838.42 6270.0 – C57
2021-02-01 00:14:07 S 05 25 05.340 -76 11 14.17 – V C57
2021-02-01 00:14:07 s 1 +36201.157 0 +370037.10 1170.0 – C57
2021-02-01 00:24:07 S 05 25 02.330 -76 11 30.37 – V C57
2021-02-01 00:24:07 s 1 +35854.191 0 +370234.74 5830.0 – C57
2021-02-01 00:34:07 S 05 24 59.455 -76 11 44.92 – V C57
2021-02-01 00:34:07 s 1 +35507.126 0 +370431.34 270.0 – C57
2021-02-01 00:44:07 S 05 24 56.623 -76 12 02.95 – V C57
2021-02-01 00:44:07 s 1 +35159.963 0 +370626.91 4470.0 – C57
2021-02-01 00:54:07 S 05 24 52.298 -76 12 20.88 – V C57
2021-02-01 00:54:07 s 1 +34812.702 0 +370821.45 8450.0 – C57
2021-02-01 01:14:07 S 05 24 46.838 -76 12 53.21 – V C57
2021-02-01 01:14:07 s 1 +34117.895 0 +371207.43 5730.0 – C57
2021-02-01 01:24:07 S 05 24 44.138 -76 13 08.40 – V C57
2021-02-01 01:24:07 s 1 +33770.349 0 +371398.87 9040.0 – C57
2021-02-01 01:34:07 S 05 24 41.069 -76 13 21.90 – V C57
2021-02-01 01:34:07 s 1 +33422.711 0 +371589.29 2120.0 – C57
2021-02-01 01:44:07 S 05 24 38.249 -76 13 39.43 – V C57
2021-02-01 01:44:07 s 1 +33074.981 0 +371778.67 4990.0 – C57
2021-02-01 01:54:07 S 05 24 35.618 -76 13 55.45 – V C57
2021-02-01 01:54:07 s 1 +32727.161 0 +371967.02 7640.0 – C57
2021-02-01 02:04:07 S 05 24 32.561 -76 14 11.72 – V C57
2021-02-01 02:04:07 s 1 +32379.251 0 +372154.35 70.0 – C57
2021-02-01 02:14:07 S 05 24 29.299 -76 14 26.92 – V C57
2021-02-01 02:14:07 s 1 +32031.253 0 +372340.65 2300.0 – C57
2021-02-01 02:24:07 S 05 24 26.172 -76 14 43.33 – V C57
2021-02-01 02:24:07 s 1 +31683.167 0 +372525.92 4310.0 – C57
2021-02-01 02:34:07 S 05 24 23.381 -76 14 59.60 – V C57
2021-02-01 02:34:07 s 1 +31334.995 0 +372710.16 6110.0 – C57
2021-02-01 02:44:07 S 05 24 20.458 -76 15 16.02 – V C57
2021-02-01 02:44:07 s 1 +30986.738 0 +372893.38 7710.0 – C57
2021-02-01 02:54:07 S 05 24 17.014 -76 15 32.40 – V C57
2021-02-01 02:54:07 s 1 +30638.397 0 +373075.58 9100.0 – C57
2021-02-01 03:04:07 S 05 24 13.915 -76 15 47.41 – V C57
2021-02-01 03:04:07 s 1 +30289.972 0 +373256.76 290.0 – C57
2021-02-01 03:14:07 S 05 24 10.901 -76 16 05.27 – V C57
2021-02-01 03:14:07 s 1 +29941.466 0 +373436.91 1270.0 – C57
2021-02-01 03:24:07 S 05 24 08.040 -76 16 20.57 – V C57
2021-02-01 03:24:07 s 1 +29592.878 0 +373616.04 2060.0 – C57
2021-02-01 03:34:07 S 05 24 04.865 -76 16 36.84 – V C57
2021-02-01 03:34:07 s 1 +29244.211 0 +373794.15 2650.0 – C57
2021-02-01 03:44:07 S 05 24 01.994 -76 16 52.21 – V C57
2021-02-01 03:44:07 s 1 +28895.465 0 +373971.23 3040.0 – C57
2021-02-01 03:54:07 S 05 23 58.577 -76 17 08.66 – 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)