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
2021-07-10 03:14:00 s 1 +145964.91 3 + 2696.129 4860.0 C57
2021-07-10 03:24:00 S 19 06 30.914 +36 52 22.33 V C57
2021-07-10 03:24:00 s 1 +146501.11 9 + 3698.846 5310.0 C57
2021-07-10 03:54:00 S 19 06 27.972 +36 52 08.08 V C57
2021-07-10 03:54:00 s 1 +148074.55 8 + 6705.914 2810.0 C57
2021-07-10 04:04:00 S 19 06 27.473 +36 52 00.70 V C57
2021-07-10 04:04:00 s 1 +148587.46 0 + 7707.785 4490.0 C57
2021-07-10 04:14:00 S 19 06 26.438 +36 51 57.74 V C57
2021-07-10 04:14:00 s 1 +149094.64 8 + 8709.354 9320.0 C57
2021-07-10 04:24:00 S 19 06 25.692 +36 51 52.70 V C57
2021-07-10 04:24:00 s 1 +149596.16 5 + 9710.585 7440.0 C57
2021-07-10 04:34:00 S 19 06 24.610 +36 51 47.95 V C57
2021-07-10 04:34:00 s 1 +150092.05 4 +10711.445 8990.0 C57
2021-07-10 04:44:00 S 19 06 23.866 +36 51 41.94 V C57
2021-07-10 04:44:00 s 1 +150582.36 0 +11711.900 4090.0 C57
2021-07-10 04:54:00 S 19 06 23.309 +36 51 39.53 V C57
2021-07-10 04:54:00 s 1 +151067.12 5 +12711.918 2880.0 C57
2021-07-10 05:04:00 S 19 06 22.289 +36 51 34.56 V C57
2021-07-10 05:04:00 s 1 +151546.39 1 +13711.468 5500.0 C57
2021-07-10 05:14:00 S 19 06 21.636 +36 51 30.17 V C57
2021-07-10 05:14:00 s 1 +152020.20 2 +14710.518 2060.0 C57
2021-07-10 05:24:00 S 19 06 20.633 +36 51 26.68 V C57
2021-07-10 05:24:00 s 1 +152488.60 0 +15709.038 2720.0 C57
2021-07-10 05:34:00 S 19 06 19.793 +36 51 20.66 V C57
2021-07-10 05:34:00 s 1 +152951.62 6 +16706.998 7580.0 C57
2021-07-10 05:44:00 S 19 06 18.912 +36 51 17.10 V C57
2021-07-10 05:44:00 s 1 +153409.32 1 +17704.371 6790.0 C57
2021-07-10 05:54:00 S 19 06 18.240 +36 51 11.12 V C57
2021-07-10 05:54:00 s 1 +153861.72 8 +18701.127 460.0 C57
2021-07-10 06:04:00 S 19 06 17.270 +36 51 07.42 V C57
2021-07-10 06:04:00 s 1 +154308.88 7 +19697.239 8730.0 C57
2021-07-10 07:14:00 S 19 06 11.822 +36 50 35.48 V C57
2021-07-10 07:14:00 s 1 +157295.44 0 +26649.824 5610.0 C57
2021-07-10 07:34:00 S 19 06 09.737 +36 50 25.37 V C57
2021-07-10 07:34:00 s 1 +158103.77 8 +28629.057 170.0 C57
2021-07-10 07:44:00 S 19 06 09.271 +36 50 21.62 V C57
2021-07-10 07:44:00 s 1 +158500.64 6 +29617.357 1090.0 C57
2021-07-10 07:54:00 S 19 06 08.462 +36 50 14.89 V C57
2021-07-10 07:54:00 s 1 +158892.69 6 +30604.751 7930.0 C57
2021-07-10 08:04:00 S 19 06 07.656 +36 50 10.97 V C57
2021-07-10 08:04:00 s 1 +159279.96 6 +31591.219 790.0 C57
2021-07-10 08:14:00 S 19 06 06.811 +36 50 05.89 V C57
2021-07-10 08:14:00 s 1 +159662.49 4 +32576.740 9790.0 C57
2021-07-10 08:24:00 S 19 06 05.954 +36 49 59.41 V C57
2021-07-10 08:24:00 s 1 +160040.31 5 +33561.295 5050.0 C57
2021-07-10 08:34:00 S 19 06 05.237 +36 49 57.36 V C57
2021-07-10 08:34:00 s 1 +160413.46 7 +34544.866 6670.0 C57
2021-07-10 08:44:00 S 19 06 04.409 +36 49 51.35 V C57
2021-07-10 08:44:00 s 1 +160781.98 4 +35527.433 4760.0 C57
2021-07-10 08:54:00 S 19 06 03.662 +36 49 48.00 V 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)