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
2021-01-29 04:24:07 s 1 +149372.69 7 +188578.89 8710.0 – C57
2021-01-29 04:34:07 S 05 42 46.644 -74 14 16.76 – V C57
2021-01-29 04:34:07 s 1 +149246.81 2 +189328.49 2450.0 – C57
2021-01-29 04:44:07 S 05 42 44.026 -74 14 33.40 – V C57
2021-01-29 04:44:07 s 1 +149119.42 6 +190076.18 3430.0 – C57
2021-01-29 04:54:07 S 05 42 42.494 -74 14 54.28 – V C57
2021-01-29 04:54:07 s 1 +148990.54 9 +190821.96 1650.0 – C57
2021-01-29 05:04:07 S 05 42 39.914 -74 15 11.34 – V C57
2021-01-29 05:04:07 s 1 +148860.19 1 +191565.84 7140.0 – C57
2021-01-29 05:14:07 S 05 42 37.944 -74 15 30.31 – V C57
2021-01-29 05:14:07 s 1 +148728.36 2 +192307.83 9920.0 – C57
2021-01-29 05:24:07 S 05 42 35.750 -74 15 48.67 – V C57
2021-01-29 05:24:07 s 1 +148595.07 3 +193047.92 10.0 – C57
2021-01-29 05:34:07 S 05 42 33.540 -74 16 07.46 – V C57
2021-01-29 05:34:07 s 1 +148460.33 4 +193786.12 7420.0 – C57
2021-01-29 05:44:07 S 05 42 31.320 -74 16 25.64 – V C57
2021-01-29 05:44:07 s 1 +148324.15 5 +194522.44 2180.0 – C57
2021-01-29 05:54:07 S 05 42 29.054 -74 16 44.33 – V C57
2021-01-29 05:54:07 s 1 +148186.54 7 +195256.88 4300.0 – C57
2021-01-29 06:04:07 S 05 42 26.810 -74 17 02.72 – V C57
2021-01-29 06:04:07 s 1 +148047.51 8 +195989.44 3800.0 – C57
2021-01-29 06:14:07 S 05 42 24.790 -74 17 21.62 – V C57
2021-01-29 06:14:07 s 1 +147907.07 9 +196720.13 700.0 – C57
2021-01-29 06:24:07 S 05 42 22.291 -74 17 40.16 – V C57
2021-01-29 06:24:07 s 1 +147765.23 9 +197448.96 5010.0 – C57
2021-01-29 06:34:07 S 05 42 20.357 -74 17 58.13 – V C57
2021-01-29 06:34:07 s 1 +147622.00 9 +198175.92 6760.0 – C57
2021-01-29 06:44:07 S 05 42 18.036 -74 18 16.27 – V C57
2021-01-29 06:44:07 s 1 +147477.39 8 +198901.02 5960.0 – C57
2021-01-29 06:54:07 S 05 42 15.756 -74 18 34.60 – V C57
2021-01-29 06:54:07 s 1 +147331.41 4 +199624.27 2620.0 – C57
2021-01-29 07:04:07 S 05 42 13.464 -74 18 53.57 – V C57
2021-01-29 07:04:07 s 1 +147184.06 8 +200345.66 6770.0 – C57
2021-01-29 07:14:07 S 05 42 11.155 -74 19 11.78 – V C57
2021-01-29 07:14:07 s 1 +147035.36 9 +201065.21 8430.0 – C57
2021-01-29 07:24:07 S 05 42 09.310 -74 19 29.53 – V C57
2021-01-29 07:24:07 s 1 +146885.32 6 +201782.92 7600.0 – C57
2021-01-29 07:34:07 S 05 42 07.001 -74 19 50.16 – V C57
2021-01-29 07:34:07 s 1 +146733.94 8 +202498.79 4300.0 – C57
2021-01-29 07:44:07 S 05 42 04.589 -74 20 06.40 – V C57
2021-01-29 07:44:07 s 1 +146581.24 4 +203212.82 8560.0 – C57
2021-01-29 07:54:07 S 05 42 02.210 -74 20 25.48 – V C57
2021-01-29 07:54:07 s 1 +146427.22 4 +203925.03 390.0 – C57
2021-01-29 08:04:07 S 05 42 00.002 -74 20 44.56 – V C57
2021-01-29 08:04:07 s 1 +146271.89 5 +204635.41 9800.0 – C57
2021-01-29 08:14:07 S 05 41 58.130 -74 21 03.28 – V C57
2021-01-29 08:14:07 s 1 +146115.26 8 +205343.96 6810.0 – C57
2021-01-29 08:24:07 S 05 41 55.526 -74 21 20.56 – V C57
2021-01-29 08:24:07 s 1 +145957.35 0 +206050.70 1430.0 – C57
2021-01-29 08:34:07 S 05 41 53.191 -74 21 38.30 – 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)