IAA RAS IAA Minor Planet Database

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
2021-01-12 21:24:08 s 1 -155703.44 3 +27303.151 4510.0 – C57
2021-01-12 21:34:08 S 06 31 16.426 -62 38 52.91 – V C57
2021-01-12 21:34:08 s 1 -155172.42 3 +26355.350 9200.0 – C57
2021-01-12 21:44:08 S 06 31 15.530 -62 39 10.08 – V C57
2021-01-12 21:44:08 s 1 -154635.92 6 +25406.628 4550.0 – C57
2021-01-12 21:54:08 S 06 31 14.866 -62 39 26.75 – V C57
2021-01-12 21:54:08 s 1 -154093.90 1 +24457.006 460.0 – C57
2021-01-12 22:04:08 S 06 31 14.210 -62 39 43.09 – V C57
2021-01-12 22:04:08 s 1 -153546.29 4 +23506.507 6860.0 – C57
2021-01-12 22:14:08 S 06 31 13.582 -62 39 59.15 – V C57
2021-01-12 22:14:08 s 1 -152993.05 0 +22555.153 3650.0 – C57
2021-01-12 22:24:08 S 06 31 12.847 -62 40 15.85 – V C57
2021-01-12 22:24:08 s 1 -152434.11 6 +21602.968 740.0 – C57
2021-01-12 22:34:08 S 06 31 11.983 -62 40 32.34 – V C57
2021-01-12 22:34:08 s 1 -151869.43 5 +20649.978 8020.0 – C57
2021-01-12 22:44:08 S 06 31 11.335 -62 40 49.37 – V C57
2021-01-12 22:44:08 s 1 -151298.95 2 +19696.207 5410.0 – C57
2021-01-12 22:54:08 S 06 31 10.651 -62 41 05.32 – V C57
2021-01-12 22:54:08 s 1 -150722.61 0 +18741.681 2800.0 – C57
2021-01-12 23:04:08 S 06 31 10.150 -62 41 21.70 – V C57
2021-01-12 23:04:08 s 1 -150140.35 2 +17786.428 110.0 – C57
2021-01-12 23:14:08 S 06 31 09.506 -62 41 37.18 – V C57
2021-01-12 23:14:08 s 1 -149552.11 9 +16830.475 7220.0 – C57
2021-01-12 23:24:08 S 06 31 08.854 -62 41 54.24 – V C57
2021-01-12 23:24:08 s 1 -148957.85 2 +15873.851 4040.0 – C57
2021-01-12 23:34:08 S 06 31 08.038 -62 42 11.05 – V C57
2021-01-12 23:34:08 s 1 -148357.49 2 +14916.585 470.0 – C57
2021-01-12 23:44:08 S 06 31 07.274 -62 42 27.58 – V C57
2021-01-12 23:44:08 s 1 -147750.97 8 +13958.709 6400.0 – C57
2021-01-12 23:54:08 S 06 31 06.778 -62 42 43.13 – V C57
2021-01-12 23:54:08 s 1 -147138.24 9 +13000.254 1720.0 – C57
2021-01-13 00:04:08 S 06 31 06.238 -62 43 00.01 – V C57
2021-01-13 00:04:08 s 1 -146519.24 2 +12041.252 6340.0 – C57
2021-01-13 00:14:08 S 06 31 05.453 -62 43 16.75 – V C57
2021-01-13 00:14:08 s 1 -145893.89 5 +11081.737 140.0 – C57
2021-01-13 00:24:08 S 06 31 04.699 -62 43 32.56 – V C57
2021-01-13 00:24:08 s 1 -145262.14 5 +10121.743 3020.0 – C57
2021-01-13 00:34:08 S 06 31 04.044 -62 43 48.94 – V C57
2021-01-13 00:34:08 s 1 -144623.92 7 + 9161.306 4850.0 – C57
2021-01-13 00:44:08 S 06 31 03.420 -62 44 04.92 – V C57
2021-01-13 00:44:08 s 1 -143979.17 5 + 8200.463 5550.0 – C57
2021-01-13 00:54:08 S 06 31 02.827 -62 44 22.52 – V C57
2021-01-13 00:54:08 s 1 -143327.82 4 + 7239.251 4980.0 – C57
2021-01-13 01:04:08 S 06 31 02.210 -62 44 37.54 – V C57
2021-01-13 01:04:08 s 1 -142669.80 7 + 6277.711 3040.0 – C57
2021-01-13 01:14:08 S 06 31 01.512 -62 44 54.92 – V C57
2021-01-13 01:14:08 s 1 -142005.05 7 + 5315.881 9600.0 – C57
2021-01-13 01:24:08 S 06 31 00.823 -62 45 10.80 – V C57
2021-01-13 01:24:08 s 1 -141333.50 3 + 4353.805 4560.0 – C57
2021-01-13 01:34:08 S 06 31 00.192 -62 45 27.47 – 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)