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
2021-01-17 17:44:08 s 1 +79481.314 0 +336008.70 940.0 – C57
2021-01-17 17:54:08 S 06 22 13.361 -66 30 07.78 – V C57
2021-01-17 17:54:08 s 1 +79165.217 0 +336355.31 2690.0 – C57
2021-01-17 18:04:08 S 06 22 12.180 -66 30 27.04 – V C57
2021-01-17 18:04:08 s 1 +78848.833 0 +336700.74 3930.0 – C57
2021-01-17 18:14:08 S 06 22 10.742 -66 30 47.23 – V C57
2021-01-17 18:14:08 s 1 +78532.164 0 +337045.01 4660.0 – C57
2021-01-17 18:24:08 S 06 22 09.598 -66 31 05.77 – V C57
2021-01-17 18:24:08 s 1 +78215.211 0 +337388.11 4890.0 – C57
2021-01-17 18:34:08 S 06 22 08.222 -66 31 24.85 – V C57
2021-01-17 18:34:08 s 1 +77897.976 0 +337730.05 4610.0 – C57
2021-01-17 18:44:08 S 06 22 07.214 -66 31 44.76 – V C57
2021-01-17 18:44:08 s 1 +77580.462 0 +338070.82 3830.0 – C57
2021-01-17 18:54:08 S 06 22 05.978 -66 32 04.92 – V C57
2021-01-17 18:54:08 s 1 +77262.668 0 +338410.43 2560.0 – C57
2021-01-17 19:04:08 S 06 22 04.819 -66 32 24.65 – V C57
2021-01-17 19:04:08 s 1 +76944.598 0 +338748.89 790.0 – C57
2021-01-17 19:14:08 S 06 22 03.564 -66 32 42.79 – V C57
2021-01-17 19:14:08 s 1 +76626.252 0 +339086.18 8530.0 – C57
2021-01-17 19:24:08 S 06 22 02.244 -66 33 02.23 – V C57
2021-01-17 19:24:08 s 1 +76307.633 0 +339422.32 5780.0 – C57
2021-01-17 19:34:08 S 06 22 01.241 -66 33 21.56 – V C57
2021-01-17 19:34:08 s 1 +75988.743 0 +339757.30 2550.0 – C57
2021-01-17 19:44:08 S 06 22 00.002 -66 33 41.47 – V C57
2021-01-17 19:44:08 s 1 +75669.582 0 +340091.13 8830.0 – C57
2021-01-17 19:54:08 S 06 21 58.829 -66 33 59.33 – V C57
2021-01-17 19:54:08 s 1 +75350.152 0 +340423.80 4630.0 – C57
2021-01-17 20:04:08 S 06 21 57.516 -66 34 19.42 – V C57
2021-01-17 20:04:08 s 1 +75030.456 0 +340755.33 9960.0 – C57
2021-01-17 20:14:08 S 06 21 56.136 -66 34 35.83 – V C57
2021-01-17 20:14:08 s 1 +74710.494 0 +341085.70 4810.0 – C57
2021-01-17 20:24:08 S 06 21 55.030 -66 34 58.08 – V C57
2021-01-17 20:24:08 s 1 +74390.269 0 +341414.92 9190.0 – C57
2021-01-17 20:34:08 S 06 21 53.969 -66 35 19.03 – V C57
2021-01-17 20:34:08 s 1 +74069.782 0 +341743.00 3100.0 – C57
2021-01-17 20:44:08 S 06 21 52.709 -66 35 37.18 – V C57
2021-01-17 20:44:08 s 1 +73749.034 0 +342069.93 6540.0 – C57
2021-01-17 20:54:08 S 06 21 51.350 -66 35 55.28 – V C57
2021-01-17 20:54:08 s 1 +73428.028 0 +342395.71 9520.0 – C57
2021-01-17 21:04:08 S 06 21 50.146 -66 36 15.16 – V C57
2021-01-17 21:04:08 s 1 +73106.764 0 +342720.36 2040.0 – C57
2021-01-17 21:14:08 S 06 21 48.871 -66 36 34.92 – V C57
2021-01-17 21:14:08 s 1 +72785.244 0 +343043.86 4100.0 – C57
2021-01-17 21:24:08 S 06 21 47.974 -66 36 54.47 – V C57
2021-01-17 21:24:08 s 1 +72463.471 0 +343366.21 5710.0 – C57
2021-01-17 21:34:08 S 06 21 46.709 -66 37 13.73 – V C57
2021-01-17 21:34:08 s 1 +72141.445 0 +343687.43 6860.0 – C57
2021-01-17 21:44:08 S 06 21 45.214 -66 37 32.66 – V C57
2021-01-17 21:44:08 s 1 +71819.168 0 +344007.52 7560.0 – C57
2021-01-17 21:54:08 S 06 21 43.961 -66 37 51.24 – 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)