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 20:34:08 s 1 -187426.73 7 +246150.78 2160.0 – C57
2021-01-10 20:44:08 S 06 35 22.318 -61 12 47.88 – V C57
2021-01-10 20:44:08 s 1 -187547.69 2 +245595.76 7430.0 – C57
2021-01-10 20:54:08 S 06 35 21.511 -61 13 07.14 – V C57
2021-01-10 20:54:08 s 1 -187667.74 8 +245039.58 1220.0 – C57
2021-01-10 21:04:08 S 06 35 20.820 -61 13 25.54 – V C57
2021-01-10 21:04:08 s 1 -187786.90 2 +244482.25 3540.0 – C57
2021-01-10 21:14:08 S 06 35 19.810 -61 13 43.57 – V C57
2021-01-10 21:14:08 s 1 -187905.15 0 +243923.74 4370.0 – C57
2021-01-10 21:24:08 S 06 35 18.756 -61 14 02.51 – V C57
2021-01-10 21:24:08 s 1 -188022.48 9 +243364.08 3700.0 – C57
2021-01-10 21:34:08 S 06 35 17.851 -61 14 21.62 – V C57
2021-01-10 21:34:08 s 1 -188138.91 3 +242803.25 1540.0 – C57
2021-01-10 21:44:08 S 06 35 17.160 -61 14 39.55 – V C57
2021-01-10 21:44:08 s 1 -188254.42 0 +242241.25 7870.0 – C57
2021-01-10 21:54:08 S 06 35 16.054 -61 14 57.95 – V C57
2021-01-10 21:54:08 s 1 -188369.00 6 +241678.08 2690.0 – C57
2021-01-10 22:04:08 S 06 35 15.149 -61 15 17.17 – V C57
2021-01-10 22:04:08 s 1 -188482.66 6 +241113.74 6000.0 – C57
2021-01-10 22:14:08 S 06 35 14.239 -61 15 34.74 – V C57
2021-01-10 22:14:08 s 1 -188595.39 8 +240548.23 7770.0 – C57
2021-01-10 22:24:08 S 06 35 13.505 -61 15 53.93 – V C57
2021-01-10 22:24:08 s 1 -188707.19 6 +239981.55 8010.0 – C57
2021-01-10 22:34:08 S 06 35 12.504 -61 16 12.72 – V C57
2021-01-10 22:34:08 s 1 -188818.05 8 +239413.69 6720.0 – C57
2021-01-10 22:44:08 S 06 35 11.590 -61 16 32.16 – V C57
2021-01-10 22:44:08 s 1 -188927.97 8 +238844.66 3880.0 – C57
2021-01-10 22:54:08 S 06 35 10.872 -61 16 50.16 – V C57
2021-01-10 22:54:08 s 1 -189036.95 4 +238274.44 9480.0 – C57
2021-01-10 23:04:08 S 06 35 09.960 -61 17 07.73 – V C57
2021-01-10 23:04:08 s 1 -189144.98 0 +237703.05 3530.0 – C57
2021-01-10 23:14:08 S 06 35 09.048 -61 17 25.98 – V C57
2021-01-10 23:14:08 s 1 -189252.05 4 +237130.48 6000.0 – C57
2021-01-10 23:24:08 S 06 35 08.330 -61 17 45.92 – V C57
2021-01-10 23:24:08 s 1 -189358.17 0 +236556.72 6910.0 – C57
2021-01-10 23:34:08 S 06 35 07.236 -61 18 03.53 – V C57
2021-01-10 23:34:08 s 1 -189463.32 6 +235981.78 6230.0 – C57
2021-01-10 23:44:08 S 06 35 06.322 -61 18 22.03 – V C57
2021-01-10 23:44:08 s 1 -189567.51 6 +235405.65 3970.0 – C57
2021-01-10 23:54:08 S 06 35 05.484 -61 18 40.68 – V C57
2021-01-10 23:54:08 s 1 -189670.73 7 +234828.34 110.0 – C57
2021-01-11 00:04:08 S 06 35 04.570 -61 18 58.57 – V C57
2021-01-11 00:04:08 s 1 -189772.98 4 +234249.84 4650.0 – C57
2021-01-11 00:14:08 S 06 35 03.586 -61 19 16.93 – V C57
2021-01-11 00:14:08 s 1 -189874.25 4 +233670.14 7580.0 – C57
2021-01-11 00:24:08 S 06 35 02.630 -61 19 36.12 – V C57
2021-01-11 00:24:08 s 1 -189974.54 1 +233089.26 8890.0 – C57
2021-01-11 00:34:08 S 06 35 01.975 -61 19 54.70 – V C57
2021-01-11 00:34:08 s 1 -190073.84 2 +232507.18 8580.0 – C57
2021-01-11 00:44:08 S 06 35 00.965 -61 20 12.80 – 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)