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
2021-01-20 01:44:08 S 06 14 54.895 -68 14 17.16 – V C57
2021-01-20 01:44:08 s 1 -34740.175 0 +393259.85 3860.0 – C57
2021-01-20 01:54:08 S 06 14 53.626 -68 14 35.34 – V C57
2021-01-20 01:54:08 s 1 -35084.645 0 +393266.67 7030.0 – C57
2021-01-20 02:04:08 S 06 14 52.106 -68 14 53.45 – V C57
2021-01-20 02:04:08 s 1 -35429.044 0 +393272.58 80.0 – C57
2021-01-20 02:14:08 S 06 14 50.654 -68 15 10.19 – V C57
2021-01-20 02:14:08 s 1 -35773.371 0 +393277.57 3030.0 – C57
2021-01-20 02:24:08 S 06 14 49.210 -68 15 29.20 – V C57
2021-01-20 02:24:08 s 1 -36117.625 0 +393281.63 5870.0 – C57
2021-01-20 02:34:08 S 06 14 47.750 -68 15 47.41 – V C57
2021-01-20 02:34:08 s 1 -36461.805 0 +393284.78 8590.0 – C57
2021-01-20 02:44:08 S 06 14 46.572 -68 16 05.27 – V C57
2021-01-20 02:44:08 s 1 -36805.910 0 +393287.02 1210.0 – C57
2021-01-20 02:54:08 S 06 14 45.290 -68 16 22.37 – V C57
2021-01-20 02:54:08 s 1 -37149.940 0 +393288.33 3710.0 – C57
2021-01-20 03:04:08 S 06 14 43.603 -68 16 40.04 – V C57
2021-01-20 03:04:08 s 1 -37493.895 0 +393288.73 6100.0 – C57
2021-01-20 03:14:08 S 06 14 42.245 -68 16 58.40 – V C57
2021-01-20 03:14:08 s 1 -37837.772 0 +393288.22 8370.0 – C57
2021-01-20 03:24:08 S 06 14 40.757 -68 17 15.86 – V C57
2021-01-20 03:24:08 s 1 -38181.572 0 +393286.78 530.0 – C57
2021-01-20 03:34:08 S 06 14 39.499 -68 17 33.54 – V C57
2021-01-20 03:34:08 s 1 -38525.293 0 +393284.43 2570.0 – C57
2021-01-20 03:44:08 S 06 14 38.160 -68 17 52.66 – V C57
2021-01-20 03:44:08 s 1 -38868.935 0 +393281.17 4480.0 – C57
2021-01-20 03:54:08 S 06 14 36.871 -68 18 10.51 – V C57
2021-01-20 03:54:08 s 1 -39212.497 0 +393276.99 6280.0 – C57
2021-01-20 04:04:08 S 06 14 35.282 -68 18 27.36 – V C57
2021-01-20 04:04:08 s 1 -39555.978 0 +393271.89 7950.0 – C57
2021-01-20 04:14:08 S 06 14 33.809 -68 18 44.42 – V C57
2021-01-20 04:14:08 s 1 -39899.377 0 +393265.88 9500.0 – C57
2021-01-20 04:24:08 S 06 14 32.458 -68 19 02.21 – V C57
2021-01-20 04:24:08 s 1 -40242.694 0 +393258.95 920.0 – C57
2021-01-20 04:34:08 S 06 14 30.965 -68 19 21.00 – V C57
2021-01-20 04:34:08 s 1 -40585.928 0 +393251.10 2220.0 – C57
2021-01-20 04:44:08 S 06 14 29.753 -68 19 38.96 – V C57
2021-01-20 04:44:08 s 1 -40929.078 0 +393242.35 3390.0 – C57
2021-01-20 04:54:08 S 06 14 28.382 -68 19 57.11 – V C57
2021-01-20 04:54:08 s 1 -41272.143 0 +393232.68 4430.0 – C57
2021-01-20 05:04:08 S 06 14 26.782 -68 20 15.54 – V C57
2021-01-20 05:04:08 s 1 -41615.123 0 +393222.09 5340.0 – C57
2021-01-20 05:14:08 S 06 14 25.315 -68 20 31.99 – V C57
2021-01-20 05:14:08 s 1 -41958.016 0 +393210.59 6110.0 – C57
2021-01-20 05:24:08 S 06 14 23.798 -68 20 49.92 – V C57
2021-01-20 05:24:08 s 1 -42300.822 0 +393198.17 6750.0 – C57
2021-01-20 05:34:08 S 06 14 22.354 -68 21 07.31 – V C57
2021-01-20 05:34:08 s 1 -42643.541 0 +393184.85 7260.0 – C57
2021-01-20 05:44:08 S 06 14 21.180 -68 21 24.80 – V C57
2021-01-20 05:44:08 s 1 -42986.170 0 +393170.60 7630.0 – 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)