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
2021-01-03 20:44:08 S 06 48 50.849 -55 18 13.18 – V C57
2021-01-03 20:44:08 s 1 +105982.59 3 +322777.18 7200.0 – C57
2021-01-03 20:54:08 S 06 48 50.316 -55 18 35.71 – V C57
2021-01-03 20:54:08 s 1 +105693.23 2 +323181.90 6230.0 – C57
2021-01-03 21:04:08 S 06 48 49.579 -55 18 59.69 – V C57
2021-01-03 21:04:08 s 1 +105403.48 8 +323585.46 4750.0 – C57
2021-01-03 21:14:08 S 06 48 48.797 -55 19 23.63 – V C57
2021-01-03 21:14:08 s 1 +105113.36 2 +323987.83 2750.0 – C57
2021-01-03 21:24:08 S 06 48 48.499 -55 19 46.16 – V C57
2021-01-03 21:24:08 s 1 +104822.85 7 +324389.03 240.0 – C57
2021-01-03 21:34:08 S 06 48 47.618 -55 20 10.36 – V C57
2021-01-03 21:34:08 s 1 +104531.97 5 +324789.06 7220.0 – C57
2021-01-03 21:44:08 S 06 48 46.997 -55 20 32.93 – V C57
2021-01-03 21:44:08 s 1 +104240.71 8 +325187.92 3690.0 – C57
2021-01-03 21:54:08 S 06 48 46.402 -55 20 56.15 – V C57
2021-01-03 21:54:08 s 1 +103949.08 8 +325585.61 9670.0 – C57
2021-01-03 22:04:08 S 06 48 45.763 -55 21 19.55 – V C57
2021-01-03 22:04:08 s 1 +103657.08 7 +325982.13 5140.0 – C57
2021-01-03 22:14:08 S 06 48 45.108 -55 21 43.52 – V C57
2021-01-03 22:14:08 s 1 +103364.71 7 +326377.48 110.0 – C57
2021-01-03 22:24:08 S 06 48 44.467 -55 22 06.46 – V C57
2021-01-03 22:24:08 s 1 +103071.97 9 +326771.67 4600.0 – C57
2021-01-03 22:34:08 S 06 48 43.759 -55 22 29.57 – V C57
2021-01-03 22:34:08 s 1 +102778.87 6 +327164.69 8580.0 – C57
2021-01-03 22:44:08 S 06 48 43.150 -55 22 53.54 – V C57
2021-01-03 22:44:08 s 1 +102485.41 1 +327556.56 2090.0 – C57
2021-01-03 22:54:08 S 06 48 42.473 -55 23 16.40 – V C57
2021-01-03 22:54:08 s 1 +102191.58 4 +327947.26 5100.0 – C57
2021-01-03 23:04:08 S 06 48 41.834 -55 23 39.88 – V C57
2021-01-03 23:04:08 s 1 +101897.39 7 +328336.80 7630.0 – C57
2021-01-03 23:14:08 S 06 48 41.206 -55 24 02.81 – V C57
2021-01-03 23:14:08 s 1 +101602.85 4 +328725.19 9680.0 – C57
2021-01-03 23:24:08 S 06 48 40.498 -55 24 26.68 – V C57
2021-01-03 23:24:08 s 1 +101307.95 5 +329112.42 1250.0 – C57
2021-01-03 23:34:08 S 06 48 39.967 -55 24 49.32 – V C57
2021-01-03 23:34:08 s 1 +101012.70 2 +329498.49 2340.0 – C57
2021-01-03 23:44:08 S 06 48 39.233 -55 25 12.68 – V C57
2021-01-03 23:44:08 s 1 +100717.09 8 +329883.42 2970.0 – C57
2021-01-03 23:54:08 S 06 48 38.568 -55 25 37.02 – V C57
2021-01-03 23:54:08 s 1 +100421.14 5 +330267.19 3120.0 – C57
2021-01-04 00:04:08 S 06 48 37.944 -55 25 59.12 – V C57
2021-01-04 00:04:08 s 1 +100124.84 3 +330649.81 2800.0 – C57
2021-01-04 00:14:08 S 06 48 37.214 -55 26 22.42 – V C57
2021-01-04 00:14:08 s 1 +99828.196 0 +331031.28 2020.0 – C57
2021-01-04 00:24:08 S 06 48 36.662 -55 26 47.00 – V C57
2021-01-04 00:24:08 s 1 +99531.205 0 +331411.61 780.0 – C57
2021-01-04 00:34:08 S 06 48 36.022 -55 27 08.96 – V C57
2021-01-04 00:34:08 s 1 +99233.872 0 +331790.79 9070.0 – C57
2021-01-04 00:44:08 S 06 48 35.340 -55 27 33.05 – V C57
2021-01-04 00:44:08 s 1 +98936.198 0 +332168.82 6910.0 – 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)