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
2021-06-29 09:54:00 S 19 26 03.276 +37 33 21.06 V C57
2021-06-29 09:54:00 s 1 +91995.546 0 +357139.41 7920.0 C57
2021-06-29 10:14:00 S 19 26 01.913 +37 33 17.86 V C57
2021-06-29 10:14:00 s 1 +91346.243 0 +357730.73 2440.0 C57
2021-06-29 10:24:00 S 19 26 00.922 +37 33 16.99 V C57
2021-06-29 10:24:00 s 1 +91021.185 0 +358024.87 8770.0 C57
2021-06-29 10:34:00 S 19 26 00.139 +37 33 20.09 V C57
2021-06-29 10:34:00 s 1 +90695.857 0 +358318.00 4490.0 C57
2021-06-29 10:44:00 S 19 25 59.364 +37 33 18.68 V C57
2021-06-29 10:44:00 s 1 +90370.262 0 +358610.12 9600.0 C57
2021-06-29 10:54:00 S 19 25 58.474 +37 33 17.32 V C57
2021-06-29 10:54:00 s 1 +90044.401 0 +358901.24 4090.0 C57
2021-06-29 11:04:00 S 19 25 57.881 +37 33 18.61 V C57
2021-06-29 11:04:00 s 1 +89718.274 0 +359191.35 7990.0 C57
2021-06-29 11:14:00 S 19 25 56.981 +37 33 17.14 V C57
2021-06-29 11:14:00 s 1 +89391.884 0 +359480.45 1280.0 C57
2021-06-29 11:24:00 S 19 25 56.134 +37 33 16.70 V C57
2021-06-29 11:24:00 s 1 +89065.231 0 +359768.54 3980.0 C57
2021-06-29 11:34:00 S 19 25 55.070 +37 33 15.98 V C57
2021-06-29 11:34:00 s 1 +88738.317 0 +360055.63 6080.0 C57
2021-06-29 11:34:21 C 19 26 35.04 +37 39 31.4 V T08
2021-06-29 11:38:59 C 19 26 34.65 +37 39 31.3 V T08
2021-06-29 11:44:00 S 19 25 54.725 +37 33 15.77 V C57
2021-06-29 11:44:00 s 1 +88411.144 0 +360341.71 7600.0 C57
2021-06-29 11:48:23 C 19 26 33.84 +37 39 31.5 V T08
2021-06-29 11:54:00 S 19 25 54.122 +37 33 13.79 V C57
2021-06-29 11:54:00 s 1 +88083.711 0 +360626.79 8520.0 C57
2021-06-29 12:04:00 S 19 25 53.335 +37 33 11.84 V C57
2021-06-29 12:04:00 s 1 +87756.022 0 +360910.87 8870.0 C57
2021-06-29 12:14:00 S 19 25 52.034 +37 33 15.16 V C57
2021-06-29 12:14:00 s 1 +87428.076 0 +361193.94 8640.0 C57
2021-06-29 12:24:00 S 19 25 51.876 +37 33 11.09 V C57
2021-06-29 12:24:00 s 1 +87099.876 0 +361476.01 7830.0 C57
2021-06-29 12:34:00 S 19 25 51.094 +37 33 10.84 V C57
2021-06-29 12:34:00 s 1 +86771.422 0 +361757.09 6460.0 C57
2021-06-29 12:44:00 S 19 25 50.366 +37 33 11.84 V C57
2021-06-29 12:44:00 s 1 +86442.717 0 +362037.16 4510.0 C57
2021-06-29 12:54:00 S 19 25 49.342 +37 33 08.35 V C57
2021-06-29 12:54:00 s 1 +86113.761 0 +362316.23 2000.0 C57
2021-06-29 13:04:00 S 19 25 48.506 +37 33 08.57 V C57
2021-06-29 13:04:00 s 1 +85784.555 0 +362594.30 8930.0 C57
2021-06-29 13:14:00 S 19 25 47.714 +37 33 09.68 V C57
2021-06-29 13:14:00 s 1 +85455.101 0 +362871.38 5300.0 C57
2021-06-29 13:24:00 S 19 25 47.198 +37 33 07.31 V C57
2021-06-29 13:24:00 s 1 +85125.400 0 +363147.46 1120.0 C57
2021-06-29 13:34:00 S 19 25 46.255 +37 33 10.26 V C57
2021-06-29 13:34:00 s 1 +84795.453 0 +363422.54 6390.0 C57
2021-06-29 13:44:00 S 19 25 45.473 +37 33 05.87 V C57
2021-06-29 13:44:00 s 1 +84465.262 0 +363696.63 1120.0 C57
2021-06-29 14:14:00 S 19 25 43.339 +37 33 03.78 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)