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
2020-12-19 05:14:08 s 1 +161810.54 0 +160902.79 6520.0 – C57
2020-12-19 05:24:08 S 07 03 18.168 -40 04 15.17 – V C57
2020-12-19 05:24:08 s 1 +161777.92 3 +161713.27 7660.0 – C57
2020-12-19 05:34:08 S 07 03 17.983 -40 04 42.53 – V C57
2020-12-19 05:34:08 s 1 +161743.37 9 +162521.84 6500.0 – C57
2020-12-19 05:44:08 S 07 03 17.743 -40 05 10.07 – V C57
2020-12-19 05:44:08 s 1 +161706.92 1 +163328.49 3080.0 – C57
2020-12-19 05:54:08 S 07 03 17.647 -40 05 36.64 – V C57
2020-12-19 05:54:08 s 1 +161668.56 5 +164133.22 7400.0 – C57
2020-12-19 06:04:08 S 07 03 17.515 -40 06 04.32 – V C57
2020-12-19 06:04:08 s 1 +161628.32 3 +164936.05 9480.0 – C57
2020-12-19 06:14:08 S 07 03 17.357 -40 06 30.82 – V C57
2020-12-19 06:14:08 s 1 +161586.20 9 +165736.98 9350.0 – C57
2020-12-19 06:24:08 S 07 03 17.278 -40 06 58.86 – V C57
2020-12-19 06:24:08 s 1 +161542.23 7 +166536.01 7010.0 – C57
2020-12-19 06:34:08 S 07 03 17.026 -40 07 25.57 – V C57
2020-12-19 06:34:08 s 1 +161496.42 0 +167333.14 2480.0 – C57
2020-12-19 06:44:08 S 07 03 16.798 -40 07 52.32 – V C57
2020-12-19 06:44:08 s 1 +161448.77 1 +168128.38 5790.0 – C57
2020-12-19 06:54:08 S 07 03 16.654 -40 08 21.30 – V C57
2020-12-19 06:54:08 s 1 +161399.30 3 +168921.73 6940.0 – C57
2020-12-19 07:24:08 S 07 03 16.212 -40 09 41.65 – V C57
2020-12-19 07:24:08 s 1 +161240.11 5 +171290.51 7620.0 – C57
2020-12-19 07:34:08 S 07 03 16.030 -40 10 09.08 – V C57
2020-12-19 07:34:08 s 1 +161183.50 0 +172076.36 310.0 – C57
2020-12-19 07:44:08 S 07 03 15.864 -40 10 35.51 – V C57
2020-12-19 07:44:08 s 1 +161125.13 0 +172860.34 930.0 – C57
2020-12-19 07:54:08 S 07 03 15.607 -40 11 04.31 – V C57
2020-12-19 07:54:08 s 1 +161065.01 6 +173642.46 9480.0 – C57
2020-12-19 08:04:08 S 07 03 15.562 -40 11 30.26 – V C57
2020-12-19 08:04:08 s 1 +161003.17 2 +174422.72 5990.0 – C57
2020-12-19 08:14:08 S 07 03 15.233 -40 11 58.49 – V C57
2020-12-19 08:14:08 s 1 +160939.60 9 +175201.13 460.0 – C57
2020-12-19 08:24:08 S 07 03 15.185 -40 12 25.63 – V C57
2020-12-19 08:24:08 s 1 +160874.33 9 +175977.68 2920.0 – C57
2020-12-19 08:34:08 S 07 03 14.887 -40 12 52.45 – V C57
2020-12-19 08:34:08 s 1 +160807.37 4 +176752.39 3380.0 – C57
2020-12-19 08:44:08 S 07 03 14.791 -40 13 19.60 – V C57
2020-12-19 08:44:08 s 1 +160738.72 5 +177525.26 1850.0 – C57
2020-12-19 08:54:08 S 07 03 14.501 -40 13 46.85 – V C57
2020-12-19 08:54:08 s 1 +160668.40 5 +178296.28 8350.0 – C57
2020-12-19 09:04:08 S 07 03 14.335 -40 14 13.70 – V C57
2020-12-19 09:04:08 s 1 +160596.42 5 +179065.48 2880.0 – C57
2020-12-19 09:14:08 S 07 03 14.170 -40 14 40.81 – V C57
2020-12-19 09:14:08 s 1 +160522.79 7 +179832.84 5480.0 – C57
2020-12-19 09:24:08 S 07 03 14.081 -40 15 08.06 – V C57
2020-12-19 09:24:08 s 1 +160447.53 1 +180598.38 6140.0 – C57
2020-12-19 09:34:08 S 07 03 13.822 -40 15 35.89 – V C57
2020-12-19 09:34:08 s 1 +160370.63 9 +181362.10 4880.0 – C57
2020-12-19 09:44:08 S 07 03 13.685 -40 16 01.85 – 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)