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
2021-01-26 04:04:07 S 05 52 39.847 -72 06 54.29 – V C57
2021-01-26 04:04:07 s 1 -157400.35 0 +19154.527 6610.0 – C57
2021-01-26 04:14:07 S 05 52 38.342 -72 07 07.50 – V C57
2021-01-26 04:14:07 s 1 -156847.40 6 +18223.749 7680.0 – C57
2021-01-26 04:24:07 S 05 52 37.037 -72 07 21.32 – V C57
2021-01-26 04:24:07 s 1 -156289.00 7 +17292.341 8900.0 – C57
2021-01-26 04:34:07 S 05 52 35.930 -72 07 34.75 – V C57
2021-01-26 04:34:07 s 1 -155725.10 5 +16360.329 170.0 – C57
2021-01-26 04:44:07 S 05 52 34.685 -72 07 49.55 – V C57
2021-01-26 04:44:07 s 1 -155155.65 0 +15427.737 1410.0 – C57
2021-01-26 04:54:07 S 05 52 33.240 -72 08 03.23 – V C57
2021-01-26 04:54:07 s 1 -154580.59 2 +14494.593 2530.0 – C57
2021-01-26 05:04:07 S 05 52 31.829 -72 08 16.51 – V C57
2021-01-26 05:04:07 s 1 -153999.88 0 +13560.922 3420.0 – C57
2021-01-26 05:14:07 S 05 52 30.528 -72 08 30.30 – V C57
2021-01-26 05:14:07 s 1 -153413.46 3 +12626.753 4000.0 – C57
2021-01-26 05:24:07 S 05 52 29.422 -72 08 43.37 – V C57
2021-01-26 05:24:07 s 1 -152821.29 0 +11692.114 4180.0 – C57
2021-01-26 05:34:07 S 05 52 28.169 -72 08 58.31 – V C57
2021-01-26 05:34:07 s 1 -152223.30 7 +10757.034 3860.0 – C57
2021-01-26 05:44:07 S 05 52 26.981 -72 09 11.84 – V C57
2021-01-26 05:44:07 s 1 -151619.46 3 + 9821.545 2930.0 – C57
2021-01-26 05:54:07 S 05 52 25.627 -72 09 24.84 – V C57
2021-01-26 05:54:07 s 1 -151009.70 4 + 8885.675 1310.0 – C57
2021-01-26 06:04:07 S 05 52 24.348 -72 09 37.91 – V C57
2021-01-26 06:04:07 s 1 -150393.97 5 + 7949.458 8890.0 – C57
2021-01-26 06:14:07 S 05 52 23.278 -72 09 51.59 – V C57
2021-01-26 06:14:07 s 1 -149772.22 2 + 7012.926 5570.0 – C57
2021-01-26 06:24:07 S 05 52 21.914 -72 10 05.88 – V C57
2021-01-26 06:24:07 s 1 -149144.39 0 + 6076.114 1260.0 – C57
2021-01-26 06:34:07 S 05 52 20.736 -72 10 19.02 – V C57
2021-01-26 06:34:07 s 1 -148510.42 2 + 5139.055 5840.0 – C57
2021-01-26 06:44:07 S 05 52 19.394 -72 10 31.12 – V C57
2021-01-26 06:44:07 s 1 -147870.26 3 + 4201.785 9220.0 – C57
2021-01-26 06:54:07 S 05 52 18.197 -72 10 44.90 – V C57
2021-01-26 06:54:07 s 1 -147223.85 4 + 3264.341 1290.0 – C57
2021-01-26 07:04:07 S 05 52 16.949 -72 11 00.13 – V C57
2021-01-26 07:04:07 s 1 -146571.13 8 + 2326.760 1950.0 – C57
2021-01-26 07:14:07 S 05 52 16.061 -72 11 14.39 – V C57
2021-01-26 07:14:07 s 1 -145912.05 7 + 1389.082 1090.0 – C57
2021-01-26 07:34:07 S 05 52 13.063 -72 11 40.16 – V C57
2021-01-26 07:34:07 s 1 -144574.56 3 - 486.407 4360.0 – C57
2021-01-26 07:44:07 S 05 52 12.106 -72 11 52.98 – V C57
2021-01-26 07:44:07 s 1 -143896.02 9 - 1424.135 8270.0 – C57
2021-01-26 07:54:07 S 05 52 10.757 -72 12 07.99 – V C57
2021-01-26 07:54:07 s 1 -143210.89 0 - 2361.795 220.0 – C57
2021-01-26 08:04:07 S 05 52 09.610 -72 12 23.40 – V C57
2021-01-26 08:04:07 s 1 -142519.08 5 - 3299.341 100.0 – C57
2021-01-26 08:14:07 S 05 52 08.712 -72 12 34.06 – V C57
2021-01-26 08:14:07 s 1 -141820.55 0 - 4236.729 7790.0 – 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)