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
2021-06-29 14:14:00 s 1 +83473.235 0 +364512.93 2040.0 C57
2021-06-29 14:24:00 S 19 25 42.590 +37 33 04.64 V C57
2021-06-29 14:24:00 s 1 +83142.079 0 +364783.04 4610.0 C57
2021-06-29 14:34:00 S 19 25 41.854 +37 33 01.08 V C57
2021-06-29 14:34:00 s 1 +82810.684 0 +365052.17 6660.0 C57
2021-06-29 14:44:00 S 19 25 41.040 +37 33 06.16 V C57
2021-06-29 14:44:00 s 1 +82479.053 0 +365320.30 8180.0 C57
2021-06-29 14:54:00 S 19 25 40.018 +37 33 00.79 V C57
2021-06-29 14:54:00 s 1 +82147.186 0 +365587.44 9170.0 C57
2021-06-29 15:04:00 S 19 25 39.274 +37 33 04.10 V C57
2021-06-29 15:04:00 s 1 +81815.085 0 +365853.59 9650.0 C57
2021-06-29 15:14:00 S 19 25 38.405 +37 33 01.84 V C57
2021-06-29 15:14:00 s 1 +81482.751 0 +366118.75 9610.0 C57
2021-06-29 15:24:00 S 19 25 38.129 +37 32 59.82 V C57
2021-06-29 15:24:00 s 1 +81150.184 0 +366382.92 9060.0 C57
2021-06-29 15:34:00 S 19 25 37.118 +37 33 03.74 V C57
2021-06-29 15:34:00 s 1 +80817.387 0 +366646.11 8000.0 C57
2021-06-29 15:44:00 S 19 25 36.329 +37 33 00.18 V C57
2021-06-29 15:44:00 s 1 +80484.360 0 +366908.31 6440.0 C57
2021-06-29 15:54:00 S 19 25 35.354 +37 33 01.40 V C57
2021-06-29 15:54:00 s 1 +80151.105 0 +367169.52 4370.0 C57
2021-06-29 16:04:00 S 19 25 34.759 +37 33 01.08 V C57
2021-06-29 16:04:00 s 1 +79817.623 0 +367429.75 1810.0 C57
2021-06-29 16:14:00 S 19 25 34.066 +37 32 59.42 V C57
2021-06-29 16:14:00 s 1 +79483.915 0 +367689.00 8750.0 C57
2021-06-29 16:24:00 S 19 25 33.487 +37 32 56.72 V C57
2021-06-29 16:24:00 s 1 +79149.982 0 +367947.26 5200.0 C57
2021-06-29 17:14:00 S 19 25 29.393 +37 32 54.71 V C57
2021-06-29 17:14:00 s 1 +77476.990 0 +369223.82 180.0 C57
2021-06-29 17:24:00 S 19 25 28.908 +37 32 52.76 V C57
2021-06-29 17:24:00 s 1 +77141.734 0 +369476.19 3750.0 C57
2021-06-29 21:54:00 S 19 25 08.316 +37 32 36.56 V C57
2021-06-29 21:54:00 s 1 +68011.840 0 +375922.32 3610.0 C57
2021-06-29 22:04:00 S 19 25 07.553 +37 32 33.18 V C57
2021-06-29 22:04:00 s 1 +67670.961 0 +376147.53 5270.0 C57
2021-06-29 22:14:00 S 19 25 06.725 +37 32 37.57 V C57
2021-06-29 22:14:00 s 1 +67329.898 0 +376371.78 6560.0 C57
2021-06-29 22:24:00 S 19 25 05.630 +37 32 34.44 V C57
2021-06-29 22:24:00 s 1 +66988.651 0 +376595.06 7460.0 C57
2021-06-29 22:44:00 S 19 25 04.265 +37 32 32.82 V C57
2021-06-29 22:44:00 s 1 +66305.612 0 +377038.76 8160.0 C57
2021-06-30 03:14:00 S 19 24 43.697 +37 32 16.12 V C57
2021-06-30 03:14:00 s 1 +57017.504 0 +382655.27 3350.0 C57
2021-06-30 04:09:15 C 19 25 14.88 +37 39 25.3 q W38
2021-06-30 04:14:00 S 19 24 39.187 +37 32 14.64 V C57
2021-06-30 04:14:00 s 1 +54937.726 0 +383809.62 5050.0 C57
2021-06-30 04:27:44 C 19 25 13.32 +37 39 25.3 q W38
2021-06-30 04:44:00 S 19 24 37.078 +37 32 09.17 V C57
2021-06-30 04:44:00 s 1 +53895.855 0 +384374.10 2200.0 C57
2021-06-30 04:50:05 C 19 25 11.43 +37 39 25.5 q W38
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)