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 18:04:08 S 06 50 27.305 -54 14 53.70 V C57
2021-01-02 18:04:08 s 1 +145539.75 0 +241549.83 9240.0 C57
2021-01-02 18:14:08 S 06 50 26.916 -54 15 17.42 V C57
2021-01-02 18:14:08 s 1 +145348.08 3 +242168.57 1650.0 C57
2021-01-02 18:24:08 S 06 50 26.117 -54 15 41.72 V C57
2021-01-02 18:24:08 s 1 +145155.49 5 +242785.77 2790.0 C57
2021-01-02 18:34:08 S 06 50 25.646 -54 16 06.17 V C57
2021-01-02 18:34:08 s 1 +144961.99 3 +243401.44 2660.0 C57
2021-01-02 18:44:08 S 06 50 25.068 -54 16 29.68 V C57
2021-01-02 18:44:08 s 1 +144767.58 2 +244015.58 1280.0 C57
2021-01-02 18:54:08 S 06 50 24.600 -54 16 53.54 V C57
2021-01-02 18:54:08 s 1 +144572.26 6 +244628.20 8660.0 C57
2021-01-02 19:04:08 S 06 50 24.050 -54 17 17.84 V C57
2021-01-02 19:04:08 s 1 +144376.05 2 +245239.29 4790.0 C57
2021-01-02 19:14:08 S 06 50 23.450 -54 17 41.53 V C57
2021-01-02 19:14:08 s 1 +144178.94 4 +245848.87 9700.0 C57
2021-01-02 19:24:08 S 06 50 22.786 -54 18 05.69 V C57
2021-01-02 19:24:08 s 1 +143980.94 8 +246456.93 3380.0 C57
2021-01-02 19:34:08 S 06 50 22.147 -54 18 30.96 V C57
2021-01-02 19:34:08 s 1 +143782.06 8 +247063.47 5840.0 C57
2021-01-02 19:44:08 S 06 50 21.811 -54 18 53.71 V C57
2021-01-02 19:44:08 s 1 +143582.31 0 +247668.51 7090.0 C57
2021-01-02 19:54:08 S 06 50 21.079 -54 19 18.12 V C57
2021-01-02 19:54:08 s 1 +143381.68 0 +248272.04 7140.0 C57
2021-01-02 20:04:08 S 06 50 20.429 -54 19 42.53 V C57
2021-01-02 20:04:08 s 1 +143180.18 1 +248874.06 6000.0 C57
2021-01-02 20:14:08 S 06 50 19.980 -54 20 05.75 V C57
2021-01-02 20:14:08 s 1 +142977.81 9 +249474.58 3670.0 C57
2021-01-02 20:24:08 S 06 50 19.469 -54 20 30.66 V C57
2021-01-02 20:24:08 s 1 +142774.59 9 +250073.60 150.0 C57
2021-01-02 20:34:08 S 06 50 18.977 -54 20 54.28 V C57
2021-01-02 20:34:08 s 1 +142570.52 6 +250671.13 5470.0 C57
2021-01-02 20:44:08 S 06 50 18.348 -54 21 18.50 V C57
2021-01-02 20:44:08 s 1 +142365.60 5 +251267.17 9610.0 C57
2021-01-02 20:54:08 S 06 50 17.669 -54 21 41.90 V C57
2021-01-02 20:54:08 s 1 +142159.84 0 +251861.71 2600.0 C57
2021-01-02 21:04:08 S 06 50 17.263 -54 22 05.20 V C57
2021-01-02 21:04:08 s 1 +141953.23 7 +252454.77 4430.0 C57
2021-01-02 21:14:08 S 06 50 16.670 -54 22 30.00 V C57
2021-01-02 21:14:08 s 1 +141745.80 0 +253046.34 5110.0 C57
2021-01-02 21:24:08 S 06 50 16.051 -54 22 54.62 V C57
2021-01-02 21:24:08 s 1 +141537.53 4 +253636.44 4650.0 C57
2021-01-02 21:34:08 S 06 50 15.377 -54 23 18.49 V C57
2021-01-02 21:34:08 s 1 +141328.44 4 +254225.05 3060.0 C57
2021-01-02 21:44:08 S 06 50 14.854 -54 23 41.46 V C57
2021-01-02 21:44:08 s 1 +141118.53 4 +254812.19 350.0 C57
2021-01-02 21:54:08 S 06 50 14.424 -54 24 05.76 V C57
2021-01-02 21:54:08 s 1 +140907.80 9 +255397.85 6510.0 C57
2021-01-02 22:04:08 S 06 50 13.882 -54 24 29.81 V C57
2021-01-02 22:04:08 s 1 +140696.27 4 +255982.05 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)