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
2021-02-03 01:04:07 s 1 -65747.352 0 +386123.34 2460.0 C57
2021-02-03 01:14:07 S 05 09 00.751 -77 26 47.44 V C57
2021-02-03 01:14:07 s 1 -66083.873 0 +386040.22 6530.0 C57
2021-02-03 01:24:07 S 05 08 56.770 -77 27 03.35 V C57
2021-02-03 01:24:07 s 1 -66420.236 0 +385956.18 370.0 C57
2021-02-03 01:34:07 S 05 08 52.812 -77 27 18.40 V C57
2021-02-03 01:34:07 s 1 -66756.438 0 +385871.23 3990.0 C57
2021-02-03 01:44:07 S 05 08 49.586 -77 27 32.44 V C57
2021-02-03 01:44:07 s 1 -67092.481 0 +385785.36 7390.0 C57
2021-02-03 01:54:07 S 05 08 45.490 -77 27 46.76 V C57
2021-02-03 01:54:07 s 1 -67428.362 0 +385698.57 560.0 C57
2021-02-03 02:04:07 S 05 08 42.082 -77 28 02.03 V C57
2021-02-03 02:04:07 s 1 -67764.081 0 +385610.86 3510.0 C57
2021-02-03 02:14:07 S 05 08 38.940 -77 28 15.82 V C57
2021-02-03 02:14:07 s 1 -68099.637 0 +385522.24 6230.0 C57
2021-02-03 02:24:07 S 05 08 35.129 -77 28 30.47 V C57
2021-02-03 02:24:07 s 1 -68435.029 0 +385432.70 8720.0 C57
2021-02-03 02:34:07 S 05 08 31.315 -77 28 45.48 V C57
2021-02-03 02:34:07 s 1 -68770.257 0 +385342.24 990.0 C57
2021-02-03 02:44:07 S 05 08 27.833 -77 29 00.49 V C57
2021-02-03 02:44:07 s 1 -69105.319 0 +385250.87 3020.0 C57
2021-02-03 02:54:07 S 05 08 24.238 -77 29 14.82 V C57
2021-02-03 02:54:07 s 1 -69440.215 0 +385158.58 4810.0 C57
2021-02-03 03:04:07 S 05 08 20.690 -77 29 29.83 V C57
2021-02-03 03:04:07 s 1 -69774.944 0 +385065.37 6380.0 C57
2021-02-03 03:14:07 S 05 08 17.045 -77 29 44.16 V C57
2021-02-03 03:14:07 s 1 -70109.505 0 +384971.25 7710.0 C57
2021-02-03 03:24:07 S 05 08 13.754 -77 29 58.92 V C57
2021-02-03 03:24:07 s 1 -70443.897 0 +384876.20 8800.0 C57
2021-02-03 03:34:07 S 05 08 10.032 -77 30 12.89 V C57
2021-02-03 03:34:07 s 1 -70778.120 0 +384780.25 9650.0 C57
2021-02-03 03:44:07 S 05 08 06.319 -77 30 27.00 V C57
2021-02-03 03:44:07 s 1 -71112.172 0 +384683.37 260.0 C57
2021-02-03 03:54:07 S 05 08 02.551 -77 30 41.44 V C57
2021-02-03 03:54:07 s 1 -71446.053 0 +384585.58 620.0 C57
2021-02-03 04:04:07 S 05 07 58.944 -77 30 57.17 V C57
2021-02-03 04:04:07 s 1 -71779.761 0 +384486.87 750.0 C57
2021-02-03 04:14:07 S 05 07 55.452 -77 31 11.28 V C57
2021-02-03 04:14:07 s 1 -72113.297 0 +384387.24 630.0 C57
2021-02-03 04:24:07 S 05 07 51.811 -77 31 26.44 V C57
2021-02-03 04:24:07 s 1 -72446.659 0 +384286.70 260.0 C57
2021-02-03 04:34:07 S 05 07 48.029 -77 31 40.94 V C57
2021-02-03 04:34:07 s 1 -72779.847 0 +384185.24 9650.0 C57
2021-02-03 04:44:07 S 05 07 44.928 -77 31 54.59 V C57
2021-02-03 04:44:07 s 1 -73112.858 0 +384082.87 8790.0 C57
2021-02-03 04:54:07 S 05 07 40.925 -77 32 10.07 V C57
2021-02-03 04:54:07 s 1 -73445.694 0 +383979.57 7670.0 C57
2021-02-03 05:04:07 S 05 07 37.495 -77 32 24.72 V C57
2021-02-03 05:04:07 s 1 -73778.352 0 +383875.36 6300.0 C57
2021-02-03 05:14:07 S 05 07 33.847 -77 32 38.69 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)