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
2021-01-15 07:24:08 s 1 +150040.28 3 +126741.00 580.0 – C57
2021-01-15 07:34:08 S 06 28 26.959 -64 31 24.67 – V C57
2021-01-15 07:34:08 s 1 +150075.03 2 +127656.27 7830.0 – C57
2021-01-15 07:44:08 S 06 28 26.220 -64 31 46.81 – V C57
2021-01-15 07:44:08 s 1 +150107.02 8 +128569.20 370.0 – C57
2021-01-15 08:04:08 S 06 28 24.355 -64 32 29.18 – V C57
2021-01-15 08:04:08 s 1 +150162.85 9 +130388.05 1480.0 – C57
2021-01-15 08:14:08 S 06 28 23.693 -64 32 51.11 – V C57
2021-01-15 08:14:08 s 1 +150186.74 3 +131293.98 140.0 – C57
2021-01-15 08:24:08 S 06 28 22.853 -64 33 12.38 – V C57
2021-01-15 08:24:08 s 1 +150207.97 0 +132197.60 4250.0 – C57
2021-01-15 08:34:08 S 06 28 21.650 -64 33 33.26 – V C57
2021-01-15 08:34:08 s 1 +150226.56 5 +133098.90 3860.0 – C57
2021-01-15 08:44:08 S 06 28 20.834 -64 33 55.19 – V C57
2021-01-15 08:44:08 s 1 +150242.55 0 +133997.89 9010.0 – C57
2021-01-15 08:54:08 S 06 28 20.177 -64 34 17.11 – V C57
2021-01-15 08:54:08 s 1 +150255.94 8 +134894.57 9720.0 – C57
2021-01-15 09:14:08 S 06 28 18.233 -64 34 58.26 – V C57
2021-01-15 09:14:08 s 1 +150275.07 4 +136681.04 8030.0 – C57
2021-01-15 09:24:08 S 06 28 17.450 -64 35 20.11 – V C57
2021-01-15 09:24:08 s 1 +150280.84 6 +137570.84 5700.0 – C57
2021-01-15 09:34:08 S 06 28 16.536 -64 35 42.04 – V C57
2021-01-15 09:34:08 s 1 +150284.12 0 +138458.36 9090.0 – C57
2021-01-15 09:44:08 S 06 28 15.602 -64 36 02.77 – V C57
2021-01-15 09:44:08 s 1 +150284.91 8 +139343.59 8240.0 – C57
2021-01-15 09:54:08 S 06 28 14.539 -64 36 23.15 – V C57
2021-01-15 09:54:08 s 1 +150283.26 1 +140226.55 3190.0 – C57
2021-01-15 10:04:08 S 06 28 13.894 -64 36 45.11 – V C57
2021-01-15 10:04:08 s 1 +150279.16 9 +141107.25 3970.0 – C57
2021-01-15 10:24:08 S 06 28 11.842 -64 37 27.62 – V C57
2021-01-15 10:24:08 s 1 +150263.76 7 +142861.85 3180.0 – C57
2021-01-15 10:34:08 S 06 28 11.018 -64 37 48.29 – V C57
2021-01-15 10:34:08 s 1 +150252.49 8 +143735.77 1680.0 – C57
2021-01-15 10:44:08 S 06 28 10.200 -64 38 10.21 – V C57
2021-01-15 10:44:08 s 1 +150238.87 5 +144607.44 6150.0 – C57
2021-01-15 10:54:08 S 06 28 09.288 -64 38 32.32 – V C57
2021-01-15 10:54:08 s 1 +150222.92 1 +145476.87 6620.0 – C57
2021-01-15 11:04:08 S 06 28 08.285 -64 38 52.44 – V C57
2021-01-15 11:04:08 s 1 +150204.65 3 +146344.06 3130.0 – C57
2021-01-15 11:14:08 S 06 28 07.601 -64 39 13.46 – V C57
2021-01-15 11:14:08 s 1 +150184.09 2 +147209.02 5720.0 – C57
2021-01-15 11:34:08 S 06 28 05.662 -64 39 56.27 – V C57
2021-01-15 11:34:08 s 1 +150136.16 5 +148932.27 9240.0 – C57
2021-01-15 11:44:08 S 06 28 04.742 -64 40 17.11 – V C57
2021-01-15 11:44:08 s 1 +150108.83 8 +149790.57 240.0 – C57
2021-01-15 12:04:08 S 06 28 02.782 -64 41 00.85 – V C57
2021-01-15 12:04:08 s 1 +150047.54 6 +151500.55 870.0 – C57
2021-01-15 12:14:08 S 06 28 02.052 -64 41 21.30 – V C57
2021-01-15 12:14:08 s 1 +150013.61 9 +152352.23 570.0 – C57
2021-01-15 12:24:08 S 06 28 01.068 -64 41 41.93 – 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)