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
2021-07-11 16:24:00 S 19 03 43.483 +36 33 48.74 V C57
2021-07-11 16:24:00 s 1 +175324.71 7 +195917.00 2780.0 C57
2021-07-11 16:34:00 S 19 03 42.989 +36 33 44.03 V C57
2021-07-11 16:34:00 s 1 +175209.68 7 +196614.15 710.0 C57
2021-07-11 16:44:00 S 19 03 42.502 +36 33 37.58 V C57
2021-07-11 16:44:00 s 1 +175093.34 4 +197309.83 5010.0 C57
2021-07-11 17:14:00 S 19 03 39.950 +36 33 20.66 V C57
2021-07-11 17:14:00 s 1 +174736.50 5 +199388.02 6340.0 C57
2021-07-11 17:24:00 S 19 03 39.065 +36 33 18.47 V C57
2021-07-11 17:24:00 s 1 +174614.97 9 +200077.82 6320.0 C57
2021-07-12 03:24:00 S 19 02 58.666 +36 28 02.96 V C57
2021-07-12 03:24:00 s 1 +165208.93 5 +238848.63 6080.0 C57
2021-07-12 03:34:00 S 19 02 57.970 +36 27 52.13 V C57
2021-07-12 03:34:00 s 1 +165020.49 1 +239452.35 2720.0 C57
2021-07-12 03:44:00 S 19 02 57.199 +36 27 51.08 V C57
2021-07-12 03:44:00 s 1 +164831.11 5 +240054.71 6830.0 C57
2021-07-12 03:54:00 S 19 02 56.854 +36 27 45.14 V C57
2021-07-12 03:54:00 s 1 +164640.81 0 +240655.73 8420.0 C57
2021-07-12 04:04:00 S 19 02 56.006 +36 27 39.96 V C57
2021-07-12 04:04:00 s 1 +164449.58 1 +241255.39 7510.0 C57
2021-07-12 04:14:00 S 19 02 55.370 +36 27 32.90 V C57
2021-07-12 04:14:00 s 1 +164257.43 2 +241853.70 4100.0 C57
2021-07-12 04:24:00 S 19 02 54.617 +36 27 29.09 V C57
2021-07-12 04:24:00 s 1 +164064.36 9 +242450.67 8210.0 C57
2021-07-12 04:34:00 S 19 02 54.108 +36 27 23.22 V C57
2021-07-12 04:34:00 s 1 +163870.39 6 +243046.29 9850.0 C57
2021-07-12 04:44:00 S 19 02 53.220 +36 27 18.14 V C57
2021-07-12 04:44:00 s 1 +163675.51 7 +243640.56 9040.0 C57
2021-07-12 04:54:00 S 19 02 52.771 +36 27 12.96 V C57
2021-07-12 04:54:00 s 1 +163479.73 6 +244233.50 5790.0 C57
2021-07-12 05:34:00 S 19 02 50.172 +36 26 51.36 V C57
2021-07-12 05:34:00 s 1 +162687.68 8 +246591.84 8620.0 C57
2021-07-12 05:44:00 S 19 02 49.502 +36 26 46.03 V C57
2021-07-12 05:44:00 s 1 +162487.46 7 +247178.08 3350.0 C57
2021-07-12 05:54:00 S 19 02 48.684 +36 26 40.49 V C57
2021-07-12 05:54:00 s 1 +162286.37 0 +247763.00 5710.0 C57
2021-07-12 06:04:00 S 19 02 48.408 +36 26 35.88 V C57
2021-07-12 06:04:00 s 1 +162084.40 2 +248346.58 5720.0 C57
2021-07-12 06:14:00 S 19 02 47.429 +36 26 28.28 V C57
2021-07-12 06:14:00 s 1 +161881.56 8 +248928.83 3380.0 C57
2021-07-12 06:34:00 S 19 02 46.274 +36 26 16.37 V C57
2021-07-12 06:34:00 s 1 +161473.31 5 +250089.36 1740.0 C57
2021-07-12 07:14:00 S 19 02 43.548 +36 25 53.69 V C57
2021-07-12 07:14:00 s 1 +160646.59 4 +252394.55 870.0 C57
2021-07-12 07:34:00 S 19 02 42.058 +36 25 42.78 V C57
2021-07-12 07:34:00 s 1 +160228.19 1 +253539.24 1830.0 C57
2021-07-12 07:44:00 S 19 02 41.575 +36 25 38.71 V C57
2021-07-12 07:44:00 s 1 +160017.74 3 +254109.61 8960.0 C57
2021-07-12 07:54:00 S 19 02 40.942 +36 25 33.67 V C57
2021-07-12 07:54:00 s 1 +159806.46 9 +254678.67 3860.0 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)