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
2021-06-27 01:54:00 s 1 +173041.28 5 +193207.56 6120.0 C57
2021-06-27 02:04:00 S 19 30 33.245 +37 34 37.20 V C57
2021-06-27 02:04:00 s 1 +172939.53 8 +193913.88 5940.0 C57
2021-06-27 02:14:00 S 19 30 32.093 +37 34 39.43 V C57
2021-06-27 02:14:00 s 1 +172836.42 9 +194618.70 2110.0 C57
2021-06-27 02:24:00 S 19 30 31.313 +37 34 40.48 V C57
2021-06-27 02:24:00 s 1 +172731.96 7 +195322.00 4670.0 C57
2021-06-27 02:44:00 S 19 30 29.611 +37 34 40.15 V C57
2021-06-27 02:44:00 s 1 +172519.01 3 +196724.08 9010.0 C57
2021-06-27 02:54:00 S 19 30 28.728 +37 34 37.06 V C57
2021-06-27 02:54:00 s 1 +172410.53 6 +197422.87 840.0 C57
2021-06-27 03:54:00 S 19 30 23.549 +37 34 39.07 V C57
2021-06-27 03:54:00 s 1 +171732.12 9 +201584.15 8320.0 C57
2021-06-27 04:34:00 S 19 30 19.817 +37 34 41.23 V C57
2021-06-27 04:34:00 s 1 +171254.14 9 +204328.56 8080.0 C57
2021-06-27 04:54:00 S 19 30 18.545 +37 34 42.74 V C57
2021-06-27 04:54:00 s 1 +171007.61 3 +205691.88 2860.0 C57
2021-06-27 05:44:00 S 19 30 14.232 +37 34 38.17 V C57
2021-06-27 05:44:00 s 1 +170369.70 2 +209074.40 7410.0 C57
2021-06-27 06:04:00 S 19 30 12.631 +37 34 39.86 V C57
2021-06-27 06:04:00 s 1 +170106.04 7 +210417.15 6650.0 C57
2021-06-27 06:14:00 S 19 30 11.789 +37 34 40.76 V C57
2021-06-27 06:14:00 s 1 +169972.42 6 +211086.33 1500.0 C57
2021-06-27 06:24:00 S 19 30 11.071 +37 34 40.73 V C57
2021-06-27 06:24:00 s 1 +169837.61 8 +211754.06 3200.0 C57
2021-06-27 06:34:00 S 19 30 10.030 +37 34 40.51 V C57
2021-06-27 06:34:00 s 1 +169701.62 9 +212420.32 1760.0 C57
2021-06-27 06:44:00 S 19 30 09.396 +37 34 39.68 V C57
2021-06-27 06:44:00 s 1 +169564.46 6 +213085.14 7210.0 C57
2021-06-27 06:54:00 S 19 30 08.314 +37 34 39.61 V C57
2021-06-27 06:54:00 s 1 +169426.13 4 +213748.50 9550.0 C57
2021-06-27 07:04:00 S 19 30 07.565 +37 34 39.83 V C57
2021-06-27 07:04:00 s 1 +169286.64 1 +214410.42 8810.0 C57
2021-06-27 07:14:00 S 19 30 06.790 +37 34 43.25 V C57
2021-06-27 07:14:00 s 1 +169145.99 1 +215070.89 5010.0 C57
2021-06-27 07:54:00 S 19 30 03.290 +37 34 38.39 V C57
2021-06-27 07:54:00 s 1 +168571.95 6 +217698.33 9450.0 C57
2021-06-27 08:04:00 S 19 30 02.381 +37 34 42.96 V C57
2021-06-27 08:04:00 s 1 +168425.61 8 +218351.59 560.0 C57
2021-06-27 08:14:00 S 19 30 01.721 +37 34 38.64 V C57
2021-06-27 08:14:00 s 1 +168278.16 0 +219003.42 8710.0 C57
2021-06-27 08:24:00 S 19 30 00.886 +37 34 41.12 V C57
2021-06-27 08:24:00 s 1 +168129.58 8 +219653.82 3900.0 C57
2021-06-27 08:45:57 C 19 30 43.90 +37 36 34.1 q U69
2021-06-27 08:54:00 S 19 29 58.392 +37 34 41.12 V C57
2021-06-27 08:54:00 s 1 +167677.24 6 +221596.43 1940.0 C57
2021-06-27 09:10:54 C 19 30 42.55 +37 36 38.5 V T05
2021-06-27 09:13:16 C 19 30 41.45 +37 36 36.8 q U69
2021-06-27 09:14:00 S 19 29 56.650 +37 34 43.10 V C57
2021-06-27 09:14:00 s 1 +167370.22 1 +222884.39 6180.0 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)