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
2021-01-02 13:54:08 S 06 50 41.179 -54 04 49.66 – V C57
2021-01-02 13:54:08 s 1 +150015.84 6 +225573.66 3130.0 – C57
2021-01-02 14:04:08 S 06 50 40.579 -54 05 13.60 – V C57
2021-01-02 14:04:08 s 1 +149849.05 0 +226231.78 9920.0 – C57
2021-01-02 14:14:08 S 06 50 39.982 -54 05 37.07 – V C57
2021-01-02 14:14:08 s 1 +149681.18 6 +226888.28 5230.0 – C57
2021-01-02 14:24:08 S 06 50 39.509 -54 06 01.48 – V C57
2021-01-02 14:24:08 s 1 +149512.25 9 +227543.17 9070.0 – C57
2021-01-02 14:34:08 S 06 50 39.072 -54 06 25.56 – V C57
2021-01-02 14:34:08 s 1 +149342.27 7 +228196.46 1440.0 – C57
2021-01-02 14:44:08 S 06 50 38.234 -54 06 50.54 – V C57
2021-01-02 14:44:08 s 1 +149171.24 6 +228848.13 2370.0 – C57
2021-01-02 14:54:08 S 06 50 37.625 -54 07 14.56 – V C57
2021-01-02 14:54:08 s 1 +148999.17 3 +229498.21 1850.0 – C57
2021-01-02 15:04:08 S 06 50 37.171 -54 07 39.58 – V C57
2021-01-02 15:04:08 s 1 +148826.06 3 +230146.69 9890.0 – C57
2021-01-02 15:14:08 S 06 50 36.826 -54 08 02.62 – V C57
2021-01-02 15:14:08 s 1 +148651.92 2 +230793.58 6510.0 – C57
2021-01-02 15:24:08 S 06 50 36.204 -54 08 27.67 – V C57
2021-01-02 15:24:08 s 1 +148476.75 8 +231438.87 1720.0 – C57
2021-01-02 15:34:08 S 06 50 35.609 -54 08 50.60 – V C57
2021-01-02 15:34:08 s 1 +148300.57 6 +232082.58 5510.0 – C57
2021-01-02 15:44:08 S 06 50 35.023 -54 09 15.12 – V C57
2021-01-02 15:44:08 s 1 +148123.38 2 +232724.70 7910.0 – C57
2021-01-02 15:54:08 S 06 50 34.570 -54 09 39.49 – V C57
2021-01-02 15:54:08 s 1 +147945.18 3 +233365.24 8910.0 – C57
2021-01-02 16:04:08 S 06 50 34.032 -54 10 04.12 – V C57
2021-01-02 16:04:08 s 1 +147765.98 4 +234004.21 8540.0 – C57
2021-01-02 16:14:08 S 06 50 33.422 -54 10 27.70 – V C57
2021-01-02 16:14:08 s 1 +147585.79 1 +234641.60 6790.0 – C57
2021-01-02 16:24:08 S 06 50 32.846 -54 10 51.67 – V C57
2021-01-02 16:24:08 s 1 +147404.61 1 +235277.41 3670.0 – C57
2021-01-02 16:34:08 S 06 50 32.352 -54 11 16.12 – V C57
2021-01-02 16:34:08 s 1 +147222.44 8 +235911.66 9200.0 – C57
2021-01-02 16:44:08 S 06 50 31.778 -54 11 40.63 – V C57
2021-01-02 16:44:08 s 1 +147039.31 0 +236544.34 3380.0 – C57
2021-01-02 16:54:08 S 06 50 31.303 -54 12 04.46 – V C57
2021-01-02 16:54:08 s 1 +146855.20 1 +237175.46 6220.0 – C57
2021-01-02 17:04:08 S 06 50 30.521 -54 12 28.40 – V C57
2021-01-02 17:04:08 s 1 +146670.12 8 +237805.03 7730.0 – C57
2021-01-02 17:14:08 S 06 50 30.110 -54 12 51.66 – V C57
2021-01-02 17:14:08 s 1 +146484.09 6 +238433.03 7910.0 – C57
2021-01-02 17:24:08 S 06 50 29.292 -54 13 19.74 – V C57
2021-01-02 17:24:08 s 1 +146297.11 1 +239059.48 6780.0 – C57
2021-01-02 17:34:08 S 06 50 28.987 -54 13 38.06 – V C57
2021-01-02 17:34:08 s 1 +146109.17 8 +239684.39 4340.0 – C57
2021-01-02 17:44:08 S 06 50 28.572 -54 14 04.88 – V C57
2021-01-02 17:44:08 s 1 +145920.30 3 +240307.74 590.0 – C57
2021-01-02 17:54:08 S 06 50 27.775 -54 14 29.08 – V C57
2021-01-02 17:54:08 s 1 +145730.49 2 +240929.56 5560.0 – 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)