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
2021-01-17 00:14:08 s 1 +110685.29 4 +292787.26 4730.0 C57
2021-01-17 00:24:08 S 06 24 16.586 -65 55 40.66 V C57
2021-01-17 00:24:08 s 1 +110410.75 8 +293266.05 9720.0 C57
2021-01-17 00:34:08 S 06 24 15.226 -65 55 59.81 V C57
2021-01-17 00:34:08 s 1 +110135.69 8 +293743.47 3800.0 C57
2021-01-17 00:44:08 S 06 24 14.323 -65 56 20.33 V C57
2021-01-17 00:44:08 s 1 +109860.11 7 +294219.53 6960.0 C57
2021-01-17 00:54:08 S 06 24 13.154 -65 56 40.74 V C57
2021-01-17 00:54:08 s 1 +109584.01 8 +294694.23 9220.0 C57
2021-01-17 01:04:08 S 06 24 12.106 -65 57 00.72 V C57
2021-01-17 01:04:08 s 1 +109307.40 4 +295167.58 580.0 C57
2021-01-17 01:14:08 S 06 24 10.759 -65 57 18.25 V C57
2021-01-17 01:14:08 s 1 +109030.27 8 +295639.57 1040.0 C57
2021-01-17 01:24:08 S 06 24 09.554 -65 57 38.81 V C57
2021-01-17 01:24:08 s 1 +108752.64 3 +296110.21 610.0 C57
2021-01-17 01:34:08 S 06 24 08.758 -65 57 59.76 V C57
2021-01-17 01:34:08 s 1 +108474.50 1 +296579.51 9290.0 C57
2021-01-17 01:44:08 S 06 24 07.627 -65 58 18.80 V C57
2021-01-17 01:44:08 s 1 +108195.85 5 +297047.46 7090.0 C57
2021-01-17 01:54:08 S 06 24 06.245 -65 58 39.54 V C57
2021-01-17 01:54:08 s 1 +107916.70 9 +297514.06 4020.0 C57
2021-01-17 02:04:08 S 06 24 05.182 -65 58 58.51 V C57
2021-01-17 02:04:08 s 1 +107637.06 5 +297979.33 70.0 C57
2021-01-17 02:14:08 S 06 24 03.931 -65 59 18.53 V C57
2021-01-17 02:14:08 s 1 +107356.92 6 +298443.25 5260.0 C57
2021-01-17 02:24:08 S 06 24 02.918 -65 59 40.70 V C57
2021-01-17 02:24:08 s 1 +107076.29 5 +298905.84 9590.0 C57
2021-01-17 02:34:08 S 06 24 01.721 -65 59 59.39 V C57
2021-01-17 02:34:08 s 1 +106795.17 4 +299367.09 3060.0 C57
2021-01-17 02:44:08 S 06 24 00.569 -66 00 19.26 V C57
2021-01-17 02:44:08 s 1 +106513.56 7 +299827.01 5670.0 C57
2021-01-17 02:54:08 S 06 23 59.299 -66 00 39.20 V C57
2021-01-17 02:54:08 s 1 +106231.47 5 +300285.60 7440.0 C57
2021-01-17 03:04:08 S 06 23 58.258 -66 00 58.97 V C57
2021-01-17 03:04:08 s 1 +105948.90 2 +300742.86 8360.0 C57
2021-01-17 03:14:08 S 06 23 57.132 -66 01 18.48 V C57
2021-01-17 03:14:08 s 1 +105665.85 0 +301198.79 8450.0 C57
2021-01-17 03:24:08 S 06 23 56.040 -66 01 38.64 V C57
2021-01-17 03:24:08 s 1 +105382.32 3 +301653.40 7700.0 C57
2021-01-17 03:34:08 S 06 23 54.847 -66 01 58.87 V C57
2021-01-17 03:34:08 s 1 +105098.32 2 +302106.69 6120.0 C57
2021-01-17 03:44:08 S 06 23 53.647 -66 02 18.74 V C57
2021-01-17 03:44:08 s 1 +104813.85 1 +302558.65 3720.0 C57
2021-01-17 03:54:08 S 06 23 52.514 -66 02 38.80 V C57
2021-01-17 03:54:08 s 1 +104528.91 2 +303009.30 500.0 C57
2021-01-17 04:04:08 S 06 23 51.454 -66 02 58.49 V C57
2021-01-17 04:04:08 s 1 +104243.50 7 +303458.64 6460.0 C57
2021-01-17 04:14:08 S 06 23 50.179 -66 03 18.76 V C57
2021-01-17 04:14:08 s 1 +103957.64 0 +303906.65 1610.0 C57
2021-01-17 04:24:08 S 06 23 48.936 -66 03 37.48 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)