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
2021-01-29 12:44:07 s 1 +141425.48 0 +223800.74 3840.0 C57
2021-01-29 12:54:07 S 05 40 53.734 -74 29 34.40 V C57
2021-01-29 12:54:07 s 1 +141235.76 7 +224459.87 9630.0 C57
2021-01-29 13:04:07 S 05 40 50.484 -74 29 51.79 V C57
2021-01-29 13:04:07 s 1 +141044.98 0 +225117.29 3440.0 C57
2021-01-29 13:14:07 S 05 40 50.220 -74 30 09.68 V C57
2021-01-29 13:14:07 s 1 +140853.12 6 +225773.00 5260.0 C57
2021-01-29 13:24:07 S 05 40 46.860 -74 30 29.70 V C57
2021-01-29 13:24:07 s 1 +140660.21 2 +226427.02 5120.0 C57
2021-01-29 13:34:07 S 05 40 44.479 -74 30 46.94 V C57
2021-01-29 13:34:07 s 1 +140466.24 5 +227079.33 3020.0 C57
2021-01-29 13:44:07 S 05 40 42.288 -74 31 04.26 V C57
2021-01-29 13:44:07 s 1 +140271.23 1 +227729.94 8990.0 C57
2021-01-29 13:54:07 S 05 40 39.991 -74 31 23.59 V C57
2021-01-29 13:54:07 s 1 +140075.17 7 +228378.87 3020.0 C57
2021-01-29 14:04:07 S 05 40 37.637 -74 31 41.12 V C57
2021-01-29 14:04:07 s 1 +139878.09 0 +229026.10 5140.0 C57
2021-01-29 14:14:07 S 05 40 35.083 -74 31 57.97 V C57
2021-01-29 14:14:07 s 1 +139679.97 6 +229671.65 5350.0 C57
2021-01-29 14:24:07 S 05 40 33.022 -74 32 17.30 V C57
2021-01-29 14:24:07 s 1 +139480.84 2 +230315.52 3670.0 C57
2021-01-29 14:34:07 S 05 40 30.115 -74 32 33.54 V C57
2021-01-29 14:34:07 s 1 +139280.69 4 +230957.71 110.0 C57
2021-01-29 14:44:07 S 05 40 27.852 -74 32 52.22 V C57
2021-01-29 14:44:07 s 1 +139079.53 8 +231598.22 4680.0 C57
2021-01-29 14:54:07 S 05 40 26.011 -74 33 11.48 V C57
2021-01-29 14:54:07 s 1 +138877.38 1 +232237.06 7390.0 C57
2021-01-29 15:04:07 S 05 40 23.856 -74 33 29.34 V C57
2021-01-29 15:04:07 s 1 +138674.22 9 +232874.24 8260.0 C57
2021-01-29 15:14:07 S 05 40 21.223 -74 33 48.35 V C57
2021-01-29 15:14:07 s 1 +138470.08 9 +233509.75 7280.0 C57
2021-01-29 15:24:07 S 05 40 18.838 -74 34 05.70 V C57
2021-01-29 15:24:07 s 1 +138264.96 5 +234143.60 4490.0 C57
2021-01-29 15:34:07 S 05 40 16.344 -74 34 22.84 V C57
2021-01-29 15:34:07 s 1 +138058.86 6 +234775.79 9880.0 C57
2021-01-29 15:44:07 S 05 40 14.448 -74 34 41.41 V C57
2021-01-29 15:44:07 s 1 +137851.79 6 +235406.33 3460.0 C57
2021-01-29 15:54:07 S 05 40 11.974 -74 35 01.28 V C57
2021-01-29 15:54:07 s 1 +137643.76 2 +236035.22 5260.0 C57
2021-01-29 16:04:07 S 05 40 09.658 -74 35 19.14 V C57
2021-01-29 16:04:07 s 1 +137434.76 9 +236662.46 5270.0 C57
2021-01-29 16:14:07 S 05 40 07.174 -74 35 35.63 V C57
2021-01-29 16:14:07 s 1 +137224.82 4 +237288.06 3520.0 C57
2021-01-29 16:24:07 S 05 40 05.124 -74 35 54.24 V C57
2021-01-29 16:24:07 s 1 +137013.93 3 +237912.01 10.0 C57
2021-01-29 16:34:07 S 05 40 02.494 -74 36 12.60 V C57
2021-01-29 16:34:07 s 1 +136802.10 1 +238534.33 4750.0 C57
2021-01-29 16:44:07 S 05 40 00.072 -74 36 29.63 V C57
2021-01-29 16:44:07 s 1 +136589.33 5 +239155.02 7750.0 C57
2021-01-29 16:54:07 S 05 39 57.744 -74 36 47.45 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)