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
2021-07-07 17:24:00 s 1 -184301.92 5 +44795.971 2060.0 C57
2021-07-07 17:34:00 S 19 11 33.317 +37 06 42.34 V C57
2021-07-07 17:34:00 s 1 -183961.35 0 +43926.713 50.0 C57
2021-07-07 17:44:00 S 19 11 32.743 +37 06 40.90 V C57
2021-07-07 17:44:00 s 1 -183617.31 8 +43056.632 7670.0 C57
2021-07-07 17:54:00 S 19 11 31.867 +37 06 38.52 V C57
2021-07-07 17:54:00 s 1 -183269.80 6 +42185.736 4870.0 C57
2021-07-07 18:04:00 S 19 11 31.135 +37 06 37.33 V C57
2021-07-07 18:04:00 s 1 -182918.79 2 +41314.038 1560.0 C57
2021-07-07 18:14:00 S 19 11 30.372 +37 06 36.68 V C57
2021-07-07 18:14:00 s 1 -182564.25 4 +40441.545 7700.0 C57
2021-07-07 18:24:00 S 19 11 29.866 +37 06 33.91 V C57
2021-07-07 18:24:00 s 1 -182206.16 9 +39568.268 3210.0 C57
2021-07-07 18:34:00 S 19 11 28.942 +37 06 32.08 V C57
2021-07-07 18:34:00 s 1 -181844.51 2 +38694.219 8030.0 C57
2021-07-07 18:44:00 S 19 11 28.190 +37 06 31.07 V C57
2021-07-07 18:44:00 s 1 -181479.26 2 +37819.406 2080.0 C57
2021-07-07 18:54:00 S 19 11 27.274 +37 06 30.64 V C57
2021-07-07 18:54:00 s 1 -181110.39 4 +36943.842 5310.0 C57
2021-07-07 19:04:00 S 19 11 26.609 +37 06 26.64 V C57
2021-07-07 19:04:00 s 1 -180737.88 6 +36067.537 7640.0 C57
2021-07-07 19:14:00 S 19 11 25.937 +37 06 26.68 V C57
2021-07-07 19:14:00 s 1 -180361.71 2 +35190.503 9000.0 C57
2021-07-07 19:24:00 S 19 11 25.229 +37 06 23.29 V C57
2021-07-07 19:24:00 s 1 -179981.84 9 +34312.751 9320.0 C57
2021-07-07 19:34:00 S 19 11 24.490 +37 06 22.64 V C57
2021-07-07 19:34:00 s 1 -179598.27 3 +33434.292 8550.0 C57
2021-07-07 19:44:00 S 19 11 23.650 +37 06 21.78 V C57
2021-07-07 19:44:00 s 1 -179210.95 9 +32555.140 6590.0 C57
2021-07-07 19:54:00 S 19 11 22.978 +37 06 19.76 V C57
2021-07-07 19:54:00 s 1 -178819.88 2 +31675.306 3390.0 C57
2021-07-07 20:04:00 S 19 11 22.020 +37 06 18.54 V C57
2021-07-07 20:04:00 s 1 -178425.01 8 +30794.804 8870.0 C57
2021-07-07 20:14:00 S 19 11 21.348 +37 06 14.33 V C57
2021-07-07 20:14:00 s 1 -178026.34 1 +29913.644 2960.0 C57
2021-07-07 20:24:00 S 19 11 20.525 +37 06 14.98 V C57
2021-07-07 20:24:00 s 1 -177623.82 7 +29031.842 5590.0 C57
2021-07-07 20:34:00 S 19 11 19.975 +37 06 11.88 V C57
2021-07-07 20:34:00 s 1 -177217.44 9 +28149.410 6680.0 C57
2021-07-07 20:44:00 S 19 11 19.087 +37 06 11.74 V C57
2021-07-07 20:44:00 s 1 -176807.18 2 +27266.362 6160.0 C57
2021-07-07 20:54:00 S 19 11 18.146 +37 06 09.61 V C57
2021-07-07 20:54:00 s 1 -176393.00 1 +26382.711 3950.0 C57
2021-07-07 21:04:00 S 19 11 17.558 +37 06 09.47 V C57
2021-07-07 21:04:00 s 1 -175974.87 8 +25498.473 9990.0 C57
2021-07-07 21:14:00 S 19 11 16.606 +37 06 07.42 V C57
2021-07-07 21:14:00 s 1 -175552.78 8 +24613.661 4190.0 C57
2021-07-07 21:24:00 S 19 11 15.924 +37 06 04.43 V C57
2021-07-07 21:24:00 s 1 -175126.70 4 +23728.291 6480.0 C57
2021-07-07 21:34:00 S 19 11 15.226 +37 05 59.82 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)