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
2021-01-08 20:54:08 s 1 -126400.96 0 +361862.65 4040.0 C57
2021-01-08 21:04:08 S 06 39 35.998 -59 40 17.51 V C57
2021-01-08 21:04:08 s 1 -126680.01 4 +361595.46 1190.0 C57
2021-01-08 21:14:08 S 06 39 35.026 -59 40 38.35 V C57
2021-01-08 21:14:08 s 1 -126958.74 4 +361327.37 7840.0 C57
2021-01-08 21:24:08 S 06 39 34.152 -59 40 57.83 V C57
2021-01-08 21:24:08 s 1 -127237.14 6 +361058.37 3990.0 C57
2021-01-08 21:34:08 S 06 39 33.370 -59 41 17.99 V C57
2021-01-08 21:34:08 s 1 -127515.22 0 +360788.47 9650.0 C57
2021-01-08 21:44:08 S 06 39 32.472 -59 41 38.29 V C57
2021-01-08 21:44:08 s 1 -127792.96 6 +360517.66 4800.0 C57
2021-01-08 21:54:08 S 06 39 31.618 -59 41 58.31 V C57
2021-01-08 21:54:08 s 1 -128070.38 2 +360245.95 9440.0 C57
2021-01-08 22:04:08 S 06 39 30.823 -59 42 19.12 V C57
2021-01-08 22:04:08 s 1 -128347.46 6 +359973.34 3580.0 C57
2021-01-08 22:14:08 S 06 39 29.794 -59 42 39.06 V C57
2021-01-08 22:14:08 s 1 -128624.21 8 +359699.82 7210.0 C57
2021-01-08 22:24:08 S 06 39 28.963 -59 42 58.50 V C57
2021-01-08 22:24:08 s 1 -128900.63 6 +359425.39 330.0 C57
2021-01-08 22:34:08 S 06 39 28.164 -59 43 19.49 V C57
2021-01-08 22:34:08 s 1 -129176.72 0 +359150.05 2940.0 C57
2021-01-08 22:44:08 S 06 39 27.238 -59 43 38.89 V C57
2021-01-08 22:44:08 s 1 -129452.46 9 +358873.81 5040.0 C57
2021-01-08 22:54:08 S 06 39 26.422 -59 43 59.30 V C57
2021-01-08 22:54:08 s 1 -129727.88 1 +358596.66 6620.0 C57
2021-01-08 22:55:06 C 06 39 52.53 -59 27 00.8 o K95
2021-01-08 23:04:08 S 06 39 25.649 -59 44 19.32 V C57
2021-01-08 23:04:08 s 1 -130002.95 4 +358318.60 7680.0 C57
2021-01-08 23:14:08 S 06 39 24.768 -59 44 38.22 V C57
2021-01-08 23:14:08 s 1 -130277.68 9 +358039.64 8230.0 C57
2021-01-08 23:24:08 S 06 39 23.676 -59 45 00.11 V C57
2021-01-08 23:24:08 s 1 -130552.08 3 +357759.76 8250.0 C57
2021-01-08 23:34:08 S 06 39 23.040 -59 45 19.33 V C57
2021-01-08 23:34:08 s 1 -130826.13 7 +357478.97 7750.0 C57
2021-01-08 23:44:08 S 06 39 22.116 -59 45 39.74 V C57
2021-01-08 23:44:08 s 1 -131099.84 7 +357197.28 6720.0 C57
2021-01-08 23:54:08 S 06 39 21.142 -59 45 59.76 V C57
2021-01-08 23:54:08 s 1 -131373.21 4 +356914.67 5170.0 C57
2021-01-09 00:04:08 S 06 39 20.232 -59 46 19.49 V C57
2021-01-09 00:04:08 s 1 -131646.23 7 +356631.15 3090.0 C57
2021-01-09 00:14:08 S 06 39 19.555 -59 46 39.47 V C57
2021-01-09 00:14:08 s 1 -131918.91 3 +356346.72 480.0 C57
2021-01-09 00:24:08 S 06 39 18.506 -59 46 59.63 V C57
2021-01-09 00:24:08 s 1 -132191.24 3 +356061.38 7340.0 C57
2021-01-09 00:34:08 S 06 39 17.798 -59 47 19.21 V C57
2021-01-09 00:34:08 s 1 -132463.22 4 +355775.13 3660.0 C57
2021-01-09 00:44:08 S 06 39 16.853 -59 47 39.84 V C57
2021-01-09 00:44:08 s 1 -132734.85 6 +355487.96 9440.0 C57
2021-01-09 00:54:08 S 06 39 15.998 -59 48 00.00 V C57
2021-01-09 00:54:08 s 1 -133006.13 7 +355199.88 4690.0 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)