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
2021-01-10 02:54:08 s 1 -170167.76 0 +298681.49 3620.0 – C57
2021-01-10 03:04:08 S 06 36 57.319 -60 39 21.53 – V C57
2021-01-10 03:04:08 s 1 -170366.47 4 +298241.97 4920.0 – C57
2021-01-10 03:14:08 S 06 36 56.297 -60 39 40.93 – V C57
2021-01-10 03:14:08 s 1 -170564.59 0 +297801.42 5270.0 – C57
2021-01-10 03:24:08 S 06 36 55.483 -60 40 00.55 – V C57
2021-01-10 03:24:08 s 1 -170762.10 4 +297359.84 4650.0 – C57
2021-01-10 03:34:08 S 06 36 54.547 -60 40 19.67 – V C57
2021-01-10 03:34:08 s 1 -170959.01 4 +296917.23 3070.0 – C57
2021-01-10 03:44:08 S 06 36 53.693 -60 40 38.68 – V C57
2021-01-10 03:44:08 s 1 -171155.31 9 +296473.59 520.0 – C57
2021-01-10 03:54:08 S 06 36 52.706 -60 40 57.76 – V C57
2021-01-10 03:54:08 s 1 -171351.01 7 +296028.91 7000.0 – C57
2021-01-10 04:04:08 S 06 36 51.943 -60 41 17.66 – V C57
2021-01-10 04:04:08 s 1 -171546.10 4 +295583.20 2500.0 – C57
2021-01-10 04:14:08 S 06 36 50.945 -60 41 36.60 – V C57
2021-01-10 04:14:08 s 1 -171740.58 0 +295136.45 7020.0 – C57
2021-01-10 04:24:08 S 06 36 49.973 -60 41 56.00 – V C57
2021-01-10 04:24:08 s 1 -171934.44 1 +294688.67 550.0 – C57
2021-01-10 04:34:08 S 06 36 49.128 -60 42 14.40 – V C57
2021-01-10 04:34:08 s 1 -172127.68 6 +294239.85 3100.0 – C57
2021-01-10 04:44:08 S 06 36 48.252 -60 42 33.73 – V C57
2021-01-10 04:44:08 s 1 -172320.31 2 +293789.99 4660.0 – C57
2021-01-10 04:54:08 S 06 36 47.189 -60 42 54.11 – V C57
2021-01-10 04:54:08 s 1 -172512.31 7 +293339.10 5220.0 – C57
2021-01-10 05:04:08 S 06 36 46.498 -60 43 12.90 – V C57
2021-01-10 05:04:08 s 1 -172703.69 9 +292887.16 4780.0 – C57
2021-01-10 05:14:08 S 06 36 45.749 -60 43 31.19 – V C57
2021-01-10 05:14:08 s 1 -172894.45 6 +292434.18 3340.0 – C57
2021-01-10 05:24:08 S 06 36 44.558 -60 43 50.59 – V C57
2021-01-10 05:24:08 s 1 -173084.58 4 +291980.16 890.0 – C57
2021-01-10 05:34:08 S 06 36 43.850 -60 44 09.71 – V C57
2021-01-10 05:34:08 s 1 -173274.08 3 +291525.10 7430.0 – C57
2021-01-10 05:44:08 S 06 36 43.126 -60 44 27.17 – V C57
2021-01-10 05:44:08 s 1 -173462.95 0 +291068.99 2950.0 – C57
2021-01-10 05:54:08 S 06 36 42.046 -60 44 46.61 – V C57
2021-01-10 05:54:08 s 1 -173651.18 2 +290611.83 7460.0 – C57
2021-01-10 06:24:08 S 06 36 39.516 -60 45 44.78 – V C57
2021-01-10 06:24:08 s 1 -174212.04 7 +289234.08 4820.0 – C57
2021-01-10 06:34:08 S 06 36 38.388 -60 46 03.47 – V C57
2021-01-10 06:34:08 s 1 -174397.71 7 +288772.74 5210.0 – C57
2021-01-10 06:44:08 S 06 36 37.500 -60 46 23.59 – V C57
2021-01-10 06:44:08 s 1 -174582.74 1 +288310.34 4560.0 – C57
2021-01-10 06:54:08 S 06 36 36.862 -60 46 42.82 – V C57
2021-01-10 06:54:08 s 1 -174767.11 7 +287846.89 2870.0 – C57
2021-01-10 07:04:08 S 06 36 35.770 -60 47 01.00 – V C57
2021-01-10 07:04:08 s 1 -174950.84 1 +287382.38 130.0 – C57
2021-01-10 07:14:08 S 06 36 34.927 -60 47 21.48 – V C57
2021-01-10 07:14:08 s 1 -175133.91 3 +286916.82 6340.0 – C57
2021-01-10 07:24:08 S 06 36 34.022 -60 47 40.02 – 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)