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
2021-01-22 09:44:07 S 06 06 38.518 -69 50 29.00 – V C57
2021-01-22 09:44:07 s 1 -141279.84 7 +344302.99 7980.0 – C57
2021-01-22 09:54:08 S 06 06 36.938 -69 50 46.14 – V C57
2021-01-22 09:54:08 s 1 -141552.00 6 +344001.88 1080.0 – C57
2021-01-22 10:04:07 S 06 06 35.345 -69 51 02.38 – V C57
2021-01-22 10:04:07 s 1 -141823.77 6 +343699.81 3520.0 – C57
2021-01-22 10:14:08 S 06 06 33.833 -69 51 18.83 – V C57
2021-01-22 10:14:08 s 1 -142095.15 7 +343396.78 5290.0 – C57
2021-01-22 10:24:08 S 06 06 32.230 -69 51 34.63 – V C57
2021-01-22 10:24:08 s 1 -142366.14 7 +343092.80 6400.0 – C57
2021-01-22 10:34:08 S 06 06 30.403 -69 51 50.90 – V C57
2021-01-22 10:34:08 s 1 -142636.74 4 +342787.87 6850.0 – C57
2021-01-22 10:44:08 S 06 06 29.021 -69 52 06.53 – V C57
2021-01-22 10:44:08 s 1 -142906.94 8 +342481.97 6630.0 – C57
2021-01-22 10:54:07 S 06 06 27.617 -69 52 23.52 – V C57
2021-01-22 10:54:07 s 1 -143176.75 7 +342175.12 5730.0 – C57
2021-01-22 11:04:08 S 06 06 25.810 -69 52 41.23 – V C57
2021-01-22 11:04:08 s 1 -143446.16 9 +341867.32 4160.0 – C57
2021-01-22 11:14:07 S 06 06 24.439 -69 52 57.14 – V C57
2021-01-22 11:14:07 s 1 -143715.18 4 +341558.55 1910.0 – C57
2021-01-22 11:24:08 S 06 06 23.038 -69 53 12.62 – V C57
2021-01-22 11:24:08 s 1 -143983.80 0 +341248.83 8990.0 – C57
2021-01-22 11:34:07 S 06 06 21.305 -69 53 29.83 – V C57
2021-01-22 11:34:07 s 1 -144252.01 6 +340938.15 5380.0 – C57
2021-01-22 11:44:08 S 06 06 19.618 -69 53 45.53 – V C57
2021-01-22 11:44:08 s 1 -144519.83 0 +340626.51 1090.0 – C57
2021-01-22 11:54:08 S 06 06 18.103 -69 54 01.40 – V C57
2021-01-22 11:54:08 s 1 -144787.24 0 +340313.91 6120.0 – C57
2021-01-22 12:04:08 S 06 06 16.807 -69 54 18.32 – V C57
2021-01-22 12:04:08 s 1 -145054.24 6 +340000.35 450.0 – C57
2021-01-22 12:14:08 S 06 06 15.142 -69 54 35.53 – V C57
2021-01-22 12:14:08 s 1 -145320.84 7 +339685.83 4100.0 – C57
2021-01-22 12:24:07 S 06 06 13.615 -69 54 51.55 – V C57
2021-01-22 12:24:07 s 1 -145587.04 0 +339370.34 7050.0 – C57
2021-01-22 12:34:08 S 06 06 12.082 -69 55 07.43 – V C57
2021-01-22 12:34:08 s 1 -145852.82 4 +339053.90 9310.0 – C57
2021-01-22 12:44:07 S 06 06 10.507 -69 55 23.09 – V C57
2021-01-22 12:44:07 s 1 -146118.19 9 +338736.49 870.0 – C57
2021-01-22 12:54:08 S 06 06 08.940 -69 55 39.58 – V C57
2021-01-22 12:54:08 s 1 -146383.16 2 +338418.12 1730.0 – C57
2021-01-22 13:04:07 S 06 06 07.253 -69 55 56.75 – V C57
2021-01-22 13:04:07 s 1 -146647.71 2 +338098.79 1890.0 – C57
2021-01-22 13:14:08 S 06 06 05.868 -69 56 13.49 – V C57
2021-01-22 13:14:08 s 1 -146911.84 9 +337778.49 1340.0 – C57
2021-01-22 13:24:08 S 06 06 04.390 -69 56 29.29 – V C57
2021-01-22 13:24:08 s 1 -147175.56 9 +337457.23 80.0 – C57
2021-01-22 13:34:07 S 06 06 02.813 -69 56 46.46 – V C57
2021-01-22 13:34:07 s 1 -147438.87 3 +337135.00 8110.0 – C57
2021-01-22 13:44:08 S 06 06 01.246 -69 57 02.74 – V C57
2021-01-22 13:44:08 s 1 -147701.75 8 +336811.81 5430.0 – 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)