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
2021-01-12 03:44:08 s 1 -188823.58 4 +120386.18 8810.0 – C57
2021-01-12 04:04:08 S 06 32 37.882 -62 09 12.78 – V C57
2021-01-12 04:04:08 s 1 -188519.90 3 +118780.95 7350.0 – C57
2021-01-12 04:54:08 S 06 32 33.542 -62 10 42.35 – V C57
2021-01-12 04:54:08 s 1 -187718.93 8 +114741.95 3050.0 – C57
2021-01-12 05:04:08 S 06 32 32.978 -62 11 00.60 – V C57
2021-01-12 05:04:08 s 1 -187551.45 8 +113929.69 5870.0 – C57
2021-01-12 05:14:08 S 06 32 32.258 -62 11 16.51 – V C57
2021-01-12 05:14:08 s 1 -187381.51 0 +113115.95 4510.0 – C57
2021-01-12 05:24:08 S 06 32 31.238 -62 11 34.15 – V C57
2021-01-12 05:24:08 s 1 -187209.07 9 +112300.72 8940.0 – C57
2021-01-12 05:34:08 S 06 32 30.478 -62 11 50.75 – V C57
2021-01-12 05:34:08 s 1 -187034.14 6 +111484.00 9140.0 – C57
2021-01-12 05:44:08 S 06 32 29.710 -62 12 07.52 – V C57
2021-01-12 05:44:08 s 1 -186856.69 6 +110665.80 5080.0 – C57
2021-01-12 05:54:08 S 06 32 28.867 -62 12 24.95 – V C57
2021-01-12 05:54:08 s 1 -186676.71 0 +109846.10 6730.0 – C57
2021-01-12 06:04:08 S 06 32 27.869 -62 12 42.62 – V C57
2021-01-12 06:04:08 s 1 -186494.17 2 +109024.91 4050.0 – C57
2021-01-12 06:14:08 S 06 32 27.178 -62 12 59.51 – V C57
2021-01-12 06:14:08 s 1 -186309.06 4 +108202.24 7030.0 – C57
2021-01-12 06:24:08 S 06 32 26.359 -62 13 17.40 – V C57
2021-01-12 06:24:08 s 1 -186121.36 8 +107378.07 5620.0 – C57
2021-01-12 06:34:08 S 06 32 25.555 -62 13 34.18 – V C57
2021-01-12 06:34:08 s 1 -185931.06 7 +106552.41 9800.0 – C57
2021-01-12 06:44:08 S 06 32 24.686 -62 13 51.24 – V C57
2021-01-12 06:44:08 s 1 -185738.14 1 +105725.26 9530.0 – C57
2021-01-12 06:54:08 S 06 32 23.738 -62 14 08.05 – V C57
2021-01-12 06:54:08 s 1 -185542.57 3 +104896.61 4790.0 – C57
2021-01-12 07:04:08 S 06 32 22.930 -62 14 26.30 – V C57
2021-01-12 07:04:08 s 1 -185344.34 4 +104066.47 5540.0 – C57
2021-01-12 07:14:08 S 06 32 22.255 -62 14 42.25 – V C57
2021-01-12 07:14:08 s 1 -185143.43 6 +103234.85 1750.0 – C57
2021-01-12 07:24:08 S 06 32 21.358 -62 15 00.36 – V C57
2021-01-12 07:24:08 s 1 -184939.83 0 +102401.72 3390.0 – C57
2021-01-12 07:34:08 S 06 32 20.539 -62 15 18.29 – V C57
2021-01-12 07:34:08 s 1 -184733.50 6 +101567.11 420.0 – C57
2021-01-12 07:44:08 S 06 32 19.814 -62 15 35.42 – V C57
2021-01-12 07:44:08 s 1 -184524.44 6 +100731.00 2810.0 – C57
2021-01-12 07:54:08 S 06 32 19.001 -62 15 52.42 – V C57
2021-01-12 07:54:08 s 1 -184312.62 9 +99893.403 540.0 – C57
2021-01-12 08:04:08 S 06 32 18.144 -62 16 08.98 – V C57
2021-01-12 08:04:08 s 1 -184098.03 7 +99054.308 3550.0 – C57
2021-01-12 08:14:08 S 06 32 17.230 -62 16 27.08 – V C57
2021-01-12 08:14:08 s 1 -183880.64 8 +98213.721 1830.0 – C57
2021-01-12 08:24:08 S 06 32 16.642 -62 16 44.47 – V C57
2021-01-12 08:24:08 s 1 -183660.44 4 +97371.641 5330.0 – C57
2021-01-12 08:34:08 S 06 32 15.862 -62 16 59.77 – V C57
2021-01-12 08:34:08 s 1 -183437.40 4 +96528.070 4030.0 – C57
2021-01-12 08:44:08 S 06 32 14.918 -62 17 17.48 – 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)