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
2021-02-04 20:14:07 s 1 -145006.90 1 +333698.87 2430.0 – C57
2021-02-04 20:24:07 S 04 52 27.007 -78 27 07.20 – V C57
2021-02-04 20:24:07 s 1 -145270.65 0 +333373.64 2720.0 – C57
2021-02-04 20:34:07 S 04 52 23.266 -78 27 21.24 – V C57
2021-02-04 20:34:07 s 1 -145533.97 0 +333047.43 2300.0 – C57
2021-02-04 20:44:07 S 04 52 18.679 -78 27 34.27 – V C57
2021-02-04 20:44:07 s 1 -145796.85 8 +332720.24 1170.0 – C57
2021-02-04 20:54:07 S 04 52 14.906 -78 27 47.30 – V C57
2021-02-04 20:54:07 s 1 -146059.31 4 +332392.08 9320.0 – C57
2021-02-04 21:04:07 S 04 52 10.793 -78 28 00.12 – V C57
2021-02-04 21:04:07 s 1 -146321.33 5 +332062.93 6750.0 – C57
2021-02-04 21:14:07 S 04 52 06.324 -78 28 13.30 – V C57
2021-02-04 21:14:07 s 1 -146582.92 1 +331732.80 3460.0 – C57
2021-02-04 21:24:07 S 04 52 02.614 -78 28 26.98 – V C57
2021-02-04 21:24:07 s 1 -146844.07 0 +331401.69 9440.0 – C57
2021-02-04 21:34:07 S 04 51 58.495 -78 28 40.19 – V C57
2021-02-04 21:34:07 s 1 -147104.78 0 +331069.60 4700.0 – C57
2021-02-04 21:44:07 S 04 51 54.492 -78 28 53.40 – V C57
2021-02-04 21:44:07 s 1 -147365.05 0 +330736.53 9230.0 – C57
2021-02-04 21:54:07 S 04 51 50.496 -78 29 06.76 – V C57
2021-02-04 21:54:07 s 1 -147624.87 9 +330402.47 3020.0 – C57
2021-02-04 22:04:07 S 04 51 46.214 -78 29 19.82 – V C57
2021-02-04 22:04:07 s 1 -147884.26 4 +330067.43 6080.0 – C57
2021-02-04 22:14:07 S 04 51 42.161 -78 29 33.94 – V C57
2021-02-04 22:14:07 s 1 -148143.20 5 +329731.40 8400.0 – C57
2021-02-04 22:24:07 S 04 51 38.095 -78 29 46.14 – V C57
2021-02-04 22:24:07 s 1 -148401.70 1 +329394.39 9990.0 – C57
2021-02-04 22:34:07 S 04 51 33.950 -78 29 59.39 – V C57
2021-02-04 22:34:07 s 1 -148659.74 8 +329056.40 820.0 – C57
2021-02-04 22:44:07 S 04 51 29.364 -78 30 12.28 – V C57
2021-02-04 22:44:07 s 1 -148917.34 7 +328717.42 910.0 – C57
2021-02-04 22:54:07 S 04 51 25.190 -78 30 25.56 – V C57
2021-02-04 22:54:07 s 1 -149174.49 5 +328377.45 250.0 – C57
2021-02-04 23:04:07 S 04 51 21.101 -78 30 39.20 – V C57
2021-02-04 23:04:07 s 1 -149431.19 1 +328036.49 8840.0 – C57
2021-02-04 23:14:07 S 04 51 17.491 -78 30 52.85 – V C57
2021-02-04 23:14:07 s 1 -149687.43 4 +327694.55 6670.0 – C57
2021-02-04 23:24:07 S 04 51 13.471 -78 31 05.70 – V C57
2021-02-04 23:24:07 s 1 -149943.22 1 +327351.62 3750.0 – C57
2021-02-04 23:34:07 S 04 51 09.326 -78 31 17.54 – V C57
2021-02-04 23:34:07 s 1 -150198.55 2 +327007.70 60.0 – C57
2021-02-04 23:44:07 S 04 51 04.891 -78 31 32.02 – V C57
2021-02-04 23:44:07 s 1 -150453.42 5 +326662.79 5610.0 – C57
2021-02-04 23:54:07 S 04 51 01.159 -78 31 45.41 – V C57
2021-02-04 23:54:07 s 1 -150707.83 8 +326316.89 400.0 – C57
2021-02-05 00:04:07 S 04 50 56.837 -78 31 57.14 – V C57
2021-02-05 00:04:07 s 1 -150961.79 0 +325970.00 4410.0 – C57
2021-02-05 00:14:07 S 04 50 52.738 -78 32 12.08 – V C57
2021-02-05 00:14:07 s 1 -151215.27 9 +325622.11 7650.0 – C57
2021-02-05 00:24:07 S 04 50 48.518 -78 32 24.72 – 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)