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
2021-01-01 06:34:08 S 06 52 07.183 -52 47 32.39 V C57
2021-01-01 06:34:08 s 1 +150477.70 7 +68929.574 2610.0 C57
2021-01-01 06:44:08 S 06 52 06.790 -52 47 57.98 V C57
2021-01-01 06:44:08 s 1 +150739.68 8 +69956.113 7610.0 C57
2021-01-01 06:54:08 S 06 52 06.367 -52 48 24.26 V C57
2021-01-01 06:54:08 s 1 +150997.07 3 +70980.515 5980.0 C57
2021-01-01 07:14:08 S 06 52 05.767 -52 49 11.42 V C57
2021-01-01 07:14:08 s 1 +151498.23 8 +73022.887 3100.0 C57
2021-01-01 07:34:08 S 06 52 05.088 -52 50 02.51 V C57
2021-01-01 07:34:08 s 1 +151981.56 7 +75056.648 4510.0 C57
2021-01-01 07:44:08 S 06 52 04.553 -52 50 28.21 V C57
2021-01-01 07:44:08 s 1 +152216.65 3 +76070.288 740.0 C57
2021-01-01 07:54:08 S 06 52 04.166 -52 50 52.51 V C57
2021-01-01 07:54:08 s 1 +152447.41 3 +77081.762 730.0 C57
2021-01-01 08:04:08 S 06 52 03.878 -52 51 17.75 V C57
2021-01-01 08:04:08 s 1 +152673.88 9 +78091.067 4560.0 C57
2021-01-01 08:14:08 S 06 52 03.475 -52 51 42.91 V C57
2021-01-01 08:14:08 s 1 +152896.12 4 +79098.199 2290.0 C57
2021-01-01 08:24:08 S 06 52 03.250 -52 52 08.04 V C57
2021-01-01 08:24:08 s 1 +153114.15 9 +80103.154 3970.0 C57
2021-01-01 08:44:08 S 06 52 02.630 -52 52 56.68 V C57
2021-01-01 08:44:08 s 1 +153537.79 3 +82106.526 9450.0 C57
2021-01-01 08:54:08 S 06 52 02.098 -52 53 21.95 V C57
2021-01-01 08:54:08 s 1 +153743.47 4 +83104.937 3360.0 C57
2021-01-01 09:04:08 S 06 52 01.632 -52 53 48.41 V C57
2021-01-01 09:04:08 s 1 +153945.11 7 +84101.162 1470.0 C57
2021-01-01 09:14:08 S 06 52 01.097 -52 54 13.97 V C57
2021-01-01 09:14:08 s 1 +154142.76 1 +85095.199 3840.0 C57
2021-01-01 10:34:08 S 06 51 58.447 -52 57 32.26 V C57
2021-01-01 10:34:08 s 1 +155584.49 1 +92968.581 2570.0 C57
2021-01-01 10:44:08 S 06 51 58.114 -52 57 57.71 V C57
2021-01-01 10:44:08 s 1 +155747.82 6 +93942.879 5690.0 C57
2021-01-01 10:54:08 S 06 51 57.694 -52 58 22.40 V C57
2021-01-01 10:54:08 s 1 +155907.52 6 +94914.981 3610.0 C57
2021-01-01 11:04:08 S 06 51 57.331 -52 58 47.68 V C57
2021-01-01 11:04:08 s 1 +156063.62 7 +95884.889 6370.0 C57
2021-01-01 11:14:08 S 06 51 56.765 -52 59 12.23 V C57
2021-01-01 11:14:08 s 1 +156216.16 1 +96852.602 4020.0 C57
2021-01-01 11:24:08 S 06 51 56.520 -52 59 37.82 V C57
2021-01-01 11:24:08 s 1 +156365.16 2 +97818.122 6610.0 C57
2021-01-01 11:34:08 S 06 51 56.186 -53 00 02.95 V C57
2021-01-01 11:34:08 s 1 +156510.66 1 +98781.448 4180.0 C57
2021-01-01 11:44:08 S 06 51 55.774 -53 00 27.43 V C57
2021-01-01 11:44:08 s 1 +156652.69 2 +99742.583 6790.0 C57
2021-01-01 11:54:08 S 06 51 55.430 -53 00 52.45 V C57
2021-01-01 11:54:08 s 1 +156791.28 7 +100701.52 4480.0 C57
2021-01-01 12:04:08 S 06 51 54.852 -53 01 16.93 V C57
2021-01-01 12:04:08 s 1 +156926.47 6 +101658.27 7300.0 C57
2021-01-01 12:14:08 S 06 51 54.492 -53 01 41.88 V C57
2021-01-01 12:14:08 s 1 +157058.29 1 +102612.84 5300.0 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)