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 19:04:08 S 06 12 26.604 -68 44 56.40 – V C57
2021-01-20 19:04:08 s 1 -70038.828 0 +389085.29 2480.0 – C57
2021-01-20 19:14:08 S 06 12 25.260 -68 45 13.68 – V C57
2021-01-20 19:14:08 s 1 -70371.630 0 +388997.52 7190.0 – C57
2021-01-20 19:24:08 S 06 12 23.906 -68 45 32.00 – V C57
2021-01-20 19:24:08 s 1 -70704.278 0 +388908.85 1640.0 – C57
2021-01-20 19:34:08 S 06 12 22.478 -68 45 48.67 – V C57
2021-01-20 19:34:08 s 1 -71036.770 0 +388819.27 5850.0 – C57
2021-01-20 19:44:08 S 06 12 20.678 -68 46 06.60 – V C57
2021-01-20 19:44:08 s 1 -71369.107 0 +388728.79 9800.0 – C57
2021-01-20 19:54:08 S 06 12 19.202 -68 46 23.12 – V C57
2021-01-20 19:54:08 s 1 -71701.287 0 +388637.40 3490.0 – C57
2021-01-20 20:04:08 S 06 12 17.782 -68 46 39.97 – V C57
2021-01-20 20:04:08 s 1 -72033.309 0 +388545.11 6930.0 – C57
2021-01-20 20:14:08 S 06 12 16.627 -68 46 57.36 – V C57
2021-01-20 20:14:08 s 1 -72365.172 0 +388451.92 110.0 – C57
2021-01-20 20:24:08 S 06 12 15.132 -68 47 15.22 – V C57
2021-01-20 20:24:08 s 1 -72696.876 0 +388357.82 3030.0 – C57
2021-01-20 20:34:08 S 06 12 13.790 -68 47 32.93 – V C57
2021-01-20 20:34:08 s 1 -73028.420 0 +388262.82 5690.0 – C57
2021-01-20 20:44:08 S 06 12 12.372 -68 47 51.00 – V C57
2021-01-20 20:44:08 s 1 -73359.803 0 +388166.92 8090.0 – C57
2021-01-20 20:54:08 S 06 12 10.550 -68 48 08.10 – V C57
2021-01-20 20:54:08 s 1 -73691.025 0 +388070.11 220.0 – C57
2021-01-20 21:04:08 S 06 12 09.331 -68 48 24.91 – V C57
2021-01-20 21:04:08 s 1 -74022.083 0 +387972.39 2090.0 – C57
2021-01-20 21:24:08 S 06 12 06.336 -68 49 00.95 – V C57
2021-01-20 21:24:08 s 1 -74683.710 0 +387774.25 5020.0 – C57
2021-01-20 21:34:08 S 06 12 05.004 -68 49 17.80 – V C57
2021-01-20 21:34:08 s 1 -75014.276 0 +387673.82 6080.0 – C57
2021-01-20 21:44:08 S 06 12 03.480 -68 49 34.93 – V C57
2021-01-20 21:44:08 s 1 -75344.676 0 +387572.49 6880.0 – C57
2021-01-20 21:54:08 S 06 12 02.090 -68 49 52.97 – V C57
2021-01-20 21:54:08 s 1 -75674.909 0 +387470.26 7390.0 – C57
2021-01-20 22:04:08 S 06 12 00.358 -68 50 09.20 – V C57
2021-01-20 22:04:08 s 1 -76004.974 0 +387367.12 7640.0 – C57
2021-01-20 22:14:08 S 06 11 58.877 -68 50 26.05 – V C57
2021-01-20 22:14:08 s 1 -76334.872 0 +387263.08 7610.0 – C57
2021-01-20 22:24:08 S 06 11 57.470 -68 50 43.91 – V C57
2021-01-20 22:24:08 s 1 -76664.599 0 +387158.13 7300.0 – C57
2021-01-20 22:34:08 S 06 11 56.107 -68 51 01.76 – V C57
2021-01-20 22:34:08 s 1 -76994.157 0 +387052.28 6710.0 – C57
2021-01-20 22:44:08 S 06 11 54.732 -68 51 19.37 – V C57
2021-01-20 22:44:08 s 1 -77323.544 0 +386945.52 5850.0 – C57
2021-01-20 22:54:08 S 06 11 53.251 -68 51 36.94 – V C57
2021-01-20 22:54:08 s 1 -77652.759 0 +386837.86 4700.0 – C57
2021-01-20 23:04:08 S 06 11 51.754 -68 51 54.43 – V C57
2021-01-20 23:04:08 s 1 -77981.802 0 +386729.30 3270.0 – C57
2021-01-20 23:14:08 S 06 11 50.059 -68 52 09.98 – V C57
2021-01-20 23:14:08 s 1 -78310.670 0 +386619.83 1560.0 – 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)