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
2021-07-11 00:34:00 S 19 04 51.463 +36 42 01.01 V C57
2021-07-11 00:34:00 s 1 +178994.91 3 +122714.28 8800.0 C57
2021-07-11 01:04:00 S 19 04 48.996 +36 41 42.25 V C57
2021-07-11 01:04:00 s 1 +179142.90 6 +125242.74 5140.0 C57
2021-07-11 01:24:00 S 19 04 47.630 +36 41 32.32 V C57
2021-07-11 01:24:00 s 1 +179230.15 2 +126920.39 330.0 C57
2021-07-11 01:44:00 S 19 04 46.135 +36 41 27.38 V C57
2021-07-11 01:44:00 s 1 +179308.40 3 +128591.66 40.0 C57
2021-07-11 02:24:00 S 19 04 43.387 +36 41 02.29 V C57
2021-07-11 02:24:00 s 1 +179438.37 7 +131915.06 4350.0 C57
2021-07-11 02:44:00 S 19 04 41.683 +36 40 53.26 V C57
2021-07-11 02:44:00 s 1 +179490.32 5 +133567.19 9620.0 C57
2021-07-11 03:04:00 S 19 04 40.243 +36 40 42.92 V C57
2021-07-11 03:04:00 s 1 +179533.72 7 +135212.95 720.0 C57
2021-07-11 03:14:00 S 19 04 39.648 +36 40 38.82 V C57
2021-07-11 03:14:00 s 1 +179552.25 7 +136033.44 2310.0 C57
2021-07-11 03:24:00 S 19 04 38.906 +36 40 32.92 V C57
2021-07-11 03:24:00 s 1 +179568.69 1 +136852.34 7980.0 C57
2021-07-11 03:34:00 S 19 04 38.110 +36 40 29.46 V C57
2021-07-11 03:34:00 s 1 +179583.04 1 +137669.65 7770.0 C57
2021-07-11 03:44:00 S 19 04 37.462 +36 40 23.16 V C57
2021-07-11 03:44:00 s 1 +179595.32 2 +138485.37 1710.0 C57
2021-07-11 03:54:00 S 19 04 36.593 +36 40 17.44 V C57
2021-07-11 03:54:00 s 1 +179605.54 5 +139299.50 9850.0 C57
2021-07-11 04:04:00 S 19 04 36.017 +36 40 12.22 V C57
2021-07-11 04:04:00 s 1 +179613.72 4 +140112.04 2220.0 C57
2021-07-11 06:34:00 S 19 04 25.246 +36 38 57.91 V C57
2021-07-11 06:34:00 s 1 +179499.52 8 +152110.12 280.0 C57
2021-07-11 06:54:00 S 19 04 23.580 +36 38 44.92 V C57
2021-07-11 06:54:00 s 1 +179451.95 9 +153683.04 5030.0 C57
2021-07-11 07:04:00 S 19 04 23.038 +36 38 40.02 V C57
2021-07-11 07:04:00 s 1 +179425.42 4 +154467.15 9690.0 C57
2021-07-11 07:14:00 S 19 04 22.363 +36 38 36.49 V C57
2021-07-11 07:14:00 s 1 +179397.07 0 +155249.69 9230.0 C57
2021-07-11 07:24:00 S 19 04 21.706 +36 38 29.94 V C57
2021-07-11 07:24:00 s 1 +179366.90 7 +156030.66 3700.0 C57
2021-07-11 07:34:00 S 19 04 20.762 +36 38 25.48 V C57
2021-07-11 07:34:00 s 1 +179334.94 7 +156810.07 3130.0 C57
2021-07-11 07:44:00 S 19 04 20.045 +36 38 18.46 V C57
2021-07-11 07:44:00 s 1 +179301.20 1 +157587.91 7540.0 C57
2021-07-11 07:54:00 S 19 04 19.260 +36 38 12.70 V C57
2021-07-11 07:54:00 s 1 +179265.67 9 +158364.18 6980.0 C57
2021-07-11 08:04:00 S 19 04 18.756 +36 38 08.84 V C57
2021-07-11 08:04:00 s 1 +179228.39 1 +159138.90 1460.0 C57
2021-07-11 08:14:00 S 19 04 17.914 +36 38 03.01 V C57
2021-07-11 08:14:00 s 1 +179189.34 9 +159912.05 1030.0 C57
2021-07-11 08:24:00 S 19 04 17.609 +36 37 59.56 V C57
2021-07-11 08:24:00 s 1 +179148.56 2 +160683.65 5700.0 C57
2021-07-11 08:34:00 S 19 04 16.418 +36 37 53.04 V C57
2021-07-11 08:34:00 s 1 +179106.04 1 +161453.68 5520.0 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)