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
2021-01-25 01:24:07 S 05 56 33.979 -71 29 19.64 – V C57
2021-01-25 01:24:07 s 1 -198320.12 0 +152858.32 2510.0 – C57
2021-01-25 01:34:07 S 05 56 32.666 -71 29 34.12 – V C57
2021-01-25 01:34:07 s 1 -198265.91 7 +152130.21 7460.0 – C57
2021-01-25 01:44:07 S 05 56 30.780 -71 29 48.70 – V C57
2021-01-25 01:44:07 s 1 -198209.93 9 +151400.74 9270.0 – C57
2021-01-25 01:54:07 S 05 56 29.107 -71 30 02.41 – V C57
2021-01-25 01:54:07 s 1 -198152.17 8 +150669.91 7920.0 – C57
2021-01-25 02:04:07 S 05 56 27.758 -71 30 16.85 – V C57
2021-01-25 02:04:07 s 1 -198092.62 3 +149937.73 3390.0 – C57
2021-01-25 02:14:07 S 05 56 26.076 -71 30 31.50 – V C57
2021-01-25 02:14:07 s 1 -198031.26 5 +149204.19 5670.0 – C57
2021-01-25 02:24:07 S 05 56 24.612 -71 30 47.05 – V C57
2021-01-25 02:24:07 s 1 -197968.09 3 +148469.29 4730.0 – C57
2021-01-25 02:34:07 S 05 56 22.920 -71 31 00.84 – V C57
2021-01-25 02:34:07 s 1 -197903.09 8 +147733.04 570.0 – C57
2021-01-25 02:44:07 S 05 56 21.528 -71 31 14.34 – V C57
2021-01-25 02:44:07 s 1 -197836.26 9 +146995.42 3150.0 – C57
2021-01-25 02:54:07 S 05 56 19.435 -71 31 29.89 – V C57
2021-01-25 02:54:07 s 1 -197767.59 6 +146256.44 2470.0 – C57
2021-01-25 03:04:07 S 05 56 18.139 -71 31 43.86 – V C57
2021-01-25 03:04:07 s 1 -197697.06 9 +145516.10 8500.0 – C57
2021-01-25 03:14:07 S 05 56 16.591 -71 31 56.96 – V C57
2021-01-25 03:14:07 s 1 -197624.67 7 +144774.39 1230.0 – C57
2021-01-25 03:24:07 S 05 56 15.511 -71 32 13.34 – V C57
2021-01-25 03:24:07 s 1 -197550.41 0 +144031.32 630.0 – C57
2021-01-25 03:34:07 S 05 56 13.730 -71 32 29.40 – V C57
2021-01-25 03:34:07 s 1 -197474.25 8 +143286.88 6680.0 – C57
2021-01-25 03:44:07 S 05 56 12.300 -71 32 42.29 – V C57
2021-01-25 03:44:07 s 1 -197396.21 0 +142541.07 9380.0 – C57
2021-01-25 03:54:07 S 05 56 10.555 -71 32 56.22 – V C57
2021-01-25 03:54:07 s 1 -197316.25 4 +141793.89 8690.0 – C57
2021-01-25 04:04:07 S 05 56 09.010 -71 33 11.41 – V C57
2021-01-25 04:04:07 s 1 -197234.38 1 +141045.34 4600.0 – C57
2021-01-25 04:14:07 S 05 56 07.246 -71 33 24.44 – V C57
2021-01-25 04:14:07 s 1 -197150.57 9 +140295.42 7090.0 – C57
2021-01-25 04:24:07 S 05 56 05.863 -71 33 40.25 – V C57
2021-01-25 04:24:07 s 1 -197064.83 7 +139544.13 6140.0 – C57
2021-01-25 04:34:07 S 05 56 04.522 -71 33 54.54 – V C57
2021-01-25 04:34:07 s 1 -196977.14 5 +138791.47 1720.0 – C57
2021-01-25 04:44:07 S 05 56 03.022 -71 34 09.19 – V C57
2021-01-25 04:44:07 s 1 -196887.49 1 +138037.43 3830.0 – C57
2021-01-25 04:54:07 S 05 56 01.373 -71 34 22.87 – V C57
2021-01-25 04:54:07 s 1 -196795.86 3 +137282.02 2430.0 – C57
2021-01-25 05:04:07 S 05 55 59.779 -71 34 37.31 – V C57
2021-01-25 05:04:07 s 1 -196702.25 0 +136525.22 7500.0 – C57
2021-01-25 05:14:07 S 05 55 57.986 -71 34 52.03 – V C57
2021-01-25 05:14:07 s 1 -196606.64 2 +135767.06 9040.0 – C57
2021-01-25 05:24:07 S 05 55 56.609 -71 35 05.17 – V C57
2021-01-25 05:24:07 s 1 -196509.02 5 +135007.51 7000.0 – 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)