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
2021-07-23 03:43:59 S 18 48 45.866 +33 52 20.78 – V C57
2021-07-23 03:43:59 s 1 -90114.334 0 -70945.775 4250.0 – C57
2021-07-23 03:53:59 S 18 48 45.470 +33 52 09.26 – V C57
2021-07-23 03:53:59 s 1 -89000.550 0 -71644.729 4920.0 – C57
2021-07-23 04:03:59 S 18 48 44.738 +33 52 06.56 – V C57
2021-07-23 04:03:59 s 1 -87878.868 0 -72337.325 1640.0 – C57
2021-07-23 04:13:59 S 18 48 43.913 +33 52 00.88 – V C57
2021-07-23 04:13:59 s 1 -86749.287 0 -73023.419 4430.0 – C57
2021-07-23 04:23:59 S 18 48 43.363 +33 51 55.22 – V C57
2021-07-23 04:23:59 s 1 -85611.807 0 -73702.864 3300.0 – C57
2021-07-23 04:43:59 S 18 48 41.784 +33 51 36.47 – V C57
2021-07-23 04:43:59 s 1 -83313.163 0 -75041.215 9420.0 – C57
2021-07-23 04:53:59 S 18 48 41.436 +33 51 34.20 – V C57
2021-07-23 04:53:59 s 1 -82152.013 0 -75699.818 6740.0 – C57
2021-07-23 05:03:59 S 18 48 40.795 +33 51 29.02 – V C57
2021-07-23 05:03:59 s 1 -80982.990 0 -76351.168 300.0 – C57
2021-07-23 05:23:59 S 18 48 39.487 +33 51 20.66 – V C57
2021-07-23 05:23:59 s 1 -78621.382 0 -77631.487 6390.0 – C57
2021-07-23 05:33:59 S 18 48 39.115 +33 51 13.14 – V C57
2021-07-23 05:33:59 s 1 -77428.832 0 -78260.139 9060.0 – C57
2021-07-23 05:43:59 S 18 48 38.479 +33 51 05.40 – V C57
2021-07-23 05:43:59 s 1 -76228.478 0 -78880.908 8260.0 – C57
2021-07-23 05:53:59 S 18 48 37.790 +33 51 02.41 – V C57
2021-07-23 05:53:59 s 1 -75020.346 0 -79493.630 4090.0 – C57
2021-07-23 06:03:59 S 18 48 37.361 +33 50 55.90 – V C57
2021-07-23 06:03:59 s 1 -73804.464 0 -80098.143 6650.0 – C57
2021-07-23 06:13:59 S 18 48 36.480 +33 50 46.00 – V C57
2021-07-23 06:13:59 s 1 -72580.863 0 -80694.281 6070.0 – C57
2021-07-23 06:23:59 S 18 48 35.938 +33 50 38.44 – V C57
2021-07-23 06:23:59 s 1 -71349.577 0 -81281.879 2460.0 – C57
2021-07-23 06:33:59 S 18 48 35.587 +33 50 34.33 – V C57
2021-07-23 06:33:59 s 1 -70110.643 0 -81860.769 5960.0 – C57
2021-07-23 06:43:59 S 18 48 35.062 +33 50 28.57 – V C57
2021-07-23 06:43:59 s 1 -68864.104 0 -82430.782 6740.0 – C57
2021-07-23 06:53:59 S 18 48 34.723 +33 50 23.06 – V C57
2021-07-23 06:53:59 s 1 -67610.005 0 -82991.750 4940.0 – C57
2021-07-23 07:03:59 S 18 48 33.917 +33 50 17.16 – V C57
2021-07-23 07:03:59 s 1 -66348.394 0 -83543.502 740.0 – C57
2021-07-23 07:23:59 S 18 48 32.244 +33 50 04.31 – V C57
2021-07-23 07:23:59 s 1 -63802.849 0 -84618.670 5880.0 – C57
2021-07-23 07:33:59 S 18 48 31.606 +33 50 00.89 – V C57
2021-07-23 07:33:59 s 1 -62519.032 0 -85141.741 5630.0 – C57
2021-07-23 07:43:59 S 18 48 31.368 +33 49 50.84 – V C57
2021-07-23 07:43:59 s 1 -61227.936 0 -85654.905 3790.0 – C57
2021-07-23 08:03:59 S 18 48 29.880 +33 49 40.55 – V C57
2021-07-23 08:03:59 s 1 -58624.188 0 -86650.818 6290.0 – C57
2021-07-23 08:13:59 S 18 48 29.446 +33 49 36.59 – V C57
2021-07-23 08:13:59 s 1 -57311.684 0 -87133.218 1140.0 – C57
2021-07-23 08:23:59 S 18 48 29.138 +33 49 28.31 – V C57
2021-07-23 08:23:59 s 1 -55992.201 0 -87605.014 5420.0 – 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)