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
2018-11-30 18:44:39 s 1 +133414.07 5 +197017.68 0.586 C57
2018-11-30 19:14:39 S 04 09 13.627 -06 54 34.96 V C57
2018-11-30 19:14:39 s 1 +132892.33 3 +199090.50 0.328 C57
2018-11-30 19:44:39 S 04 09 10.968 -06 55 21.97 V C57
2018-11-30 19:44:39 s 1 +132360.91 4 +201148.74 0.603 C57
2018-11-30 20:14:39 S 04 09 08.362 -06 56 07.94 V C57
2018-11-30 20:14:39 s 1 +131820.00 1 +203192.46 0.525 C57
2018-11-30 20:44:39 S 04 09 05.796 -06 56 52.04 V C57
2018-11-30 20:44:39 s 1 +131269.77 0 +205221.73 0.207 C57
2018-11-30 21:14:39 S 04 09 03.252 -06 57 36.94 V C57
2018-11-30 21:14:39 s 1 +130710.39 8 +207236.62 0.757 C57
2018-11-30 21:44:39 S 04 09 00.634 -06 58 21.65 V C57
2018-11-30 21:44:39 s 1 +130142.05 5 +209237.19 0.283 C57
2018-11-30 22:14:39 S 04 08 58.020 -06 59 07.37 V C57
2018-11-30 22:14:39 s 1 +129564.90 7 +211223.51 0.89 C57
2018-11-30 22:44:39 S 04 08 55.490 -06 59 52.19 V C57
2018-11-30 22:44:39 s 1 +128979.11 8 +213195.64 0.68 C57
2018-11-30 23:14:39 S 04 08 52.874 -07 00 38.16 V C57
2018-11-30 23:14:39 s 1 +128384.84 7 +215153.66 0.756 C57
2018-11-30 23:44:39 S 04 08 50.278 -07 01 21.54 V C57
2018-11-30 23:44:39 s 1 +127782.25 1 +217097.61 0.215 C57
2018-12-01 00:14:39 S 04 08 47.734 -07 02 06.86 V C57
2018-12-01 00:14:39 s 1 +127171.48 2 +219027.58 0.154 C57
2018-12-01 00:44:39 S 04 08 45.139 -07 02 52.08 V C57
2018-12-01 00:44:39 s 1 +126552.69 0 +220943.62 0.668 C57
2018-12-01 01:14:39 S 04 08 42.550 -07 03 37.44 V C57
2018-12-01 01:14:39 s 1 +125926.02 2 +222845.80 0.85 C57
2018-12-01 01:44:39 S 04 08 39.943 -07 04 22.01 V C57
2018-12-01 01:44:39 s 1 +125291.62 1 +224734.18 0.792 C57
2018-12-01 02:14:39 S 04 08 37.390 -07 05 06.54 V C57
2018-12-01 02:14:39 s 1 +124649.62 8 +226608.83 0.583 C57
2018-12-01 02:44:39 S 04 08 34.742 -07 05 52.30 V C57
2018-12-01 02:44:39 s 1 +124000.17 9 +228469.80 0.31 C57
2018-12-01 03:14:39 S 04 08 32.146 -07 06 36.22 V C57
2018-12-01 03:14:39 s 1 +123343.41 0 +230317.17 0.06 C57
2018-12-01 03:44:39 S 04 08 29.633 -07 07 21.94 V C57
2018-12-01 03:44:39 s 1 +122679.45 3 +232150.98 9170.0 C57
2018-12-01 04:14:39 S 04 08 26.966 -07 08 05.28 V C57
2018-12-01 04:14:39 s 1 +122008.43 7 +233971.32 9630.0 C57
2018-12-01 04:44:39 S 04 08 24.432 -07 08 50.50 V C57
2018-12-01 04:44:39 s 1 +121330.48 9 +235778.23 2810.0 C57
2018-12-01 05:14:39 S 04 08 21.790 -07 09 35.50 V C57
2018-12-01 05:14:39 s 1 +120645.73 2 +237571.77 9490.0 C57
2018-12-01 05:44:39 S 04 08 19.207 -07 10 19.85 V C57
2018-12-01 05:44:39 s 1 +119954.28 9 +239352.02 460.0 C57
2018-12-01 06:14:39 S 04 08 16.598 -07 11 03.30 V C57
2018-12-01 06:14:39 s 1 +119256.27 9 +241119.02 6490.0 C57
2018-12-01 06:44:39 S 04 08 14.066 -07 11 48.59 V C57
2018-12-01 06:44:39 s 1 +118551.81 9 +242872.84 8330.0 C57
2018-12-01 07:14:39 S 04 08 11.402 -07 12 34.92 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)