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
2018-11-15 17:14:39 s 1 +112732.16 9 -27661.102 6200.0 C57
2018-11-15 17:44:39 S 04 34 49.958 +02 20 13.20 V C57
2018-11-15 17:44:39 s 1 +114501.22 9 -24656.805 2480.0 C57
2018-11-15 18:14:39 S 04 34 48.204 +02 19 27.52 V C57
2018-11-15 18:14:39 s 1 +116207.70 0 -21639.023 1730.0 C57
2018-11-15 18:44:39 S 04 34 46.531 +02 18 36.61 V C57
2018-11-15 18:44:39 s 1 +117852.89 0 -18609.823 8950.0 C57
2018-11-15 19:14:39 S 04 34 44.777 +02 17 52.19 V C57
2018-11-15 19:14:39 s 1 +119438.11 3 -15571.147 9310.0 C57
2018-11-15 19:44:39 S 04 34 43.169 +02 17 04.52 V C57
2018-11-15 19:44:39 s 1 +120964.68 7 -12524.820 8180.0 C57
2018-11-15 20:14:39 S 04 34 41.436 +02 16 17.83 V C57
2018-11-15 20:14:39 s 1 +122433.92 4 - 9472.551 1020.0 C57
2018-11-15 20:44:39 S 04 34 39.667 +02 15 29.81 V C57
2018-11-15 20:44:39 s 1 +123847.13 1 - 6415.944 3400.0 C57
2018-11-15 21:14:39 S 04 34 38.018 +02 14 44.23 V C57
2018-11-15 21:14:39 s 1 +125205.60 4 - 3356.497 960.0 C57
2018-11-15 21:44:39 S 04 34 36.168 +02 13 57.61 V C57
2018-11-15 21:44:39 s 1 +126510.62 4 - 295.614 9380.0 C57
2018-11-15 22:14:39 S 04 34 34.565 +02 13 10.99 V C57
2018-11-15 22:14:39 s 1 +127763.45 6 + 2765.395 4360.0 C57
2018-11-15 22:44:39 S 04 34 32.693 +02 12 23.80 V C57
2018-11-15 22:44:39 s 1 +128965.34 6 + 5825.303 1590.0 C57
2018-11-15 23:14:39 S 04 34 31.018 +02 11 36.20 V C57
2018-11-15 23:14:39 s 1 +130117.52 0 + 8882.969 6750.0 C57
2018-11-15 23:44:39 S 04 34 29.179 +02 10 48.86 V C57
2018-11-15 23:44:39 s 1 +131221.18 1 +11937.325 5510.0 C57
2018-11-16 00:14:39 S 04 34 27.401 +02 10 03.79 V C57
2018-11-16 00:14:39 s 1 +132277.51 0 +14987.377 3470.0 C57
2018-11-16 00:44:39 S 04 34 25.668 +02 09 16.16 V C57
2018-11-16 00:44:39 s 1 +133287.66 4 +18032.200 6180.0 C57
2018-11-16 01:14:39 S 04 34 23.762 +02 08 30.05 V C57
2018-11-16 01:14:39 s 1 +134252.77 4 +21070.931 9130.0 C57
2018-11-16 01:44:39 S 04 34 22.063 +02 07 45.48 V C57
2018-11-16 01:44:39 s 1 +135173.94 5 +24102.769 7760.0 C57
2018-11-16 02:14:39 S 04 34 20.246 +02 06 58.00 V C57
2018-11-16 02:14:39 s 1 +136052.25 9 +27126.967 7390.0 C57
2018-11-16 02:44:39 S 04 34 18.360 +02 06 11.45 V C57
2018-11-16 02:44:39 s 1 +136888.76 9 +30142.832 3290.0 C57
2018-11-16 03:14:39 S 04 34 16.637 +02 05 25.98 V C57
2018-11-16 03:14:39 s 1 +137684.50 4 +33149.721 620.0 C57
2018-11-16 03:44:39 S 04 34 14.714 +02 04 38.96 V C57
2018-11-16 03:44:39 s 1 +138440.46 7 +36147.037 4470.0 C57
2018-11-16 04:14:39 S 04 34 12.989 +02 03 54.40 V C57
2018-11-16 04:14:39 s 1 +139157.63 5 +39134.226 9810.0 C57
2018-11-16 04:44:39 S 04 34 11.179 +02 03 09.29 V C57
2018-11-16 04:44:39 s 1 +139836.95 8 +42110.776 1550.0 C57
2018-11-16 05:14:39 S 04 34 09.197 +02 02 21.44 V C57
2018-11-16 05:14:39 s 1 +140479.36 4 +45076.211 4450.0 C57
2018-11-16 05:44:39 S 04 34 07.421 +02 01 35.26 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)