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
2021-06-30 05:04:00 S 19 24 35.544 +37 32 08.34 V C57
2021-06-30 05:04:00 s 1 +53200.558 0 +384745.73 8970.0 C57
2021-06-30 06:24:00 S 19 24 29.496 +37 32 01.86 V C57
2021-06-30 06:24:00 s 1 +50413.815 0 +386194.79 6010.0 C57
2021-06-30 07:04:00 S 19 24 26.237 +37 32 01.68 V C57
2021-06-30 07:04:00 s 1 +49017.220 0 +386896.89 8790.0 C57
2021-06-30 11:44:00 S 19 24 05.712 +37 31 35.58 V C57
2021-06-30 11:44:00 s 1 +39186.624 0 +391396.06 7280.0 C57
2021-06-30 14:24:00 S 19 23 53.875 +37 31 25.50 V C57
2021-06-30 14:24:00 s 1 +33531.642 0 +393642.99 9790.0 C57
2021-06-30 14:44:00 S 19 23 51.665 +37 31 24.67 V C57
2021-06-30 14:44:00 s 1 +32823.104 0 +393907.41 5430.0 C57
2021-06-30 15:04:00 S 19 23 50.131 +37 31 22.22 V C57
2021-06-30 15:04:00 s 1 +32114.220 0 +394168.17 640.0 C57
2021-06-30 16:24:00 S 19 23 44.388 +37 31 16.36 V C57
2021-06-30 16:24:00 s 1 +29275.364 0 +395174.86 7730.0 C57
2021-06-30 16:34:00 S 19 23 43.596 +37 31 14.48 V C57
2021-06-30 16:34:00 s 1 +28920.149 0 +395296.60 4480.0 C57
2021-06-30 23:34:00 S 19 23 12.002 +37 30 38.05 V C57
2021-06-30 23:34:00 s 1 +13942.340 0 +399595.09 1050.0 C57
2021-07-01 01:54:00 S 19 23 01.685 +37 30 24.98 V C57
2021-07-01 06:04:00 S 19 22 42.902 +37 30 03.02 V C57
2021-07-01 06:14:00 S 19 22 42.038 +37 30 00.61 V C57
2021-07-01 06:34:00 S 19 22 41.016 +37 29 57.34 V C57
2021-07-01 06:54:00 S 19 22 39.499 +37 30 00.22 V C57
2021-07-01 07:04:00 S 19 22 38.563 +37 29 56.65 V C57
2021-07-01 09:44:00 S 19 22 26.674 +37 29 38.54 V C57
2021-07-01 09:54:00 S 19 22 26.213 +37 29 37.97 V C57
2021-07-01 10:04:00 S 19 22 25.498 +37 29 33.32 V C57
2021-07-01 10:14:00 S 19 22 24.672 +37 29 38.58 V C57
2021-07-01 10:24:00 S 19 22 24.242 +37 29 34.37 V C57
2021-07-01 10:34:00 S 19 22 23.153 +37 29 35.30 V C57
2021-07-01 10:44:00 S 19 22 22.510 +37 29 34.69 V C57
2021-07-01 10:44:00 s 1 -10076.551 0 +403196.90 290.0 C57
2021-07-01 10:54:00 S 19 22 21.766 +37 29 31.13 V C57
2021-07-01 10:54:00 s 1 -10435.199 0 +403220.66 7660.0 C57
2021-07-01 12:44:00 S 19 22 13.774 +37 29 25.12 V C57
2021-07-01 12:44:00 s 1 -14379.249 0 +403424.11 6270.0 C57
2021-07-01 13:14:00 S 19 22 11.722 +37 29 19.82 V C57
2021-07-01 13:14:00 s 1 -15454.474 0 +403461.19 760.0 C57
2021-07-01 13:24:00 S 19 22 10.565 +37 29 18.10 V C57
2021-07-01 13:24:00 s 1 -15812.834 0 +403471.80 5160.0 C57
2021-07-01 13:34:00 S 19 22 09.821 +37 29 14.82 V C57
2021-07-01 13:34:00 s 1 -16171.168 0 +403481.53 9350.0 C57
2021-07-01 13:44:00 S 19 22 09.442 +37 29 13.24 V C57
2021-07-01 13:44:00 s 1 -16529.476 0 +403490.39 3320.0 C57
2021-07-01 14:04:00 S 19 22 07.793 +37 29 14.06 V C57
2021-07-01 14:04:00 s 1 -17246.010 0 +403505.49 590.0 C57
2021-07-01 14:24:00 S 19 22 06.439 +37 29 11.51 V C57
2021-07-01 14:24:00 s 1 -17962.430 0 +403517.08 6960.0 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)