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
2020-12-04 11:50:58 C 07 05 00.17 -24 45 39.7 – V T08
2020-12-04 11:53:38 C 07 05 00.16 -24 45 46.5 – V T08
2020-12-04 11:57:37 C 07 05 00.18 -24 45 56.5 – V T08
2020-12-04 12:04:54 C 07 05 00.19 -24 46 15.0 – V T08
2020-12-05 06:12:13 C 07 05 06.92 -25 32 17.7 – V V93
2020-12-05 07:09:27 C 07 05 06.98 -25 34 43.8 – V V93
2020-12-05 07:45:31 C 07 05 07.03 -25 36 16.0 – V V93
2020-12-06 11:48:48 C 07 05 14.03 -26 47 53.8 – V T05
2020-12-06 11:51:27 C 07 05 14.02 -26 48 00.8 – V T05
2020-12-06 11:55:31 C 07 05 14.02 -26 48 11.2 – V T05
2020-12-06 12:03:26 C 07 05 14.00 -26 48 31.6 – V T05
2020-12-08 11:30:01 C 07 05 17.78 -28 50 47.9 – V T08
2020-12-08 11:32:40 C 07 05 17.76 -28 50 55.0 – V T08
2020-12-08 11:37:19 C 07 05 17.73 -28 51 07.1 – V T08
2020-12-08 11:48:37 C 07 05 17.66 -28 51 36.3 – V T08
2020-12-10 12:10:07 C 07 05 10.53 -30 57 15.0 – V T05
2020-12-10 12:15:02 C 07 05 10.47 -30 57 27.6 – V T05
2020-12-10 12:21:37 C 07 05 10.41 -30 57 44.9 – V T05
2020-12-10 12:26:16 C 07 05 10.37 -30 57 57.0 – V T05
2020-12-12 02:17:18 C 07 04 58.04 -32 36 26.3 – q 834
2020-12-12 03:38:58 C 07 04 57.06 -32 40 00.7 – q 834
2020-12-18 05:44:08 S 07 03 31.658 -38 59 31.67 – V C57
2020-12-18 05:44:08 s 1 +136589.41 0 +26098.242 8960.0 – C57
2020-12-18 05:54:08 S 07 03 31.661 -38 59 58.38 – V C57
2020-12-18 05:54:08 s 1 +137090.12 8 +27192.325 3290.0 – C57
2020-12-18 06:04:08 S 07 03 31.733 -39 00 25.16 – V C57
2020-12-18 06:04:08 s 1 +137583.79 9 +28285.005 8780.0 – C57
2020-12-18 06:14:08 S 07 03 31.687 -39 00 53.78 – V C57
2020-12-18 06:14:08 s 1 +138070.50 0 +29376.247 5520.0 – C57
2020-12-18 06:24:08 S 07 03 31.711 -39 01 20.86 – V C57
2020-12-18 06:24:08 s 1 +138550.31 0 +30466.018 3610.0 – C57
2020-12-18 06:34:08 S 07 03 31.692 -39 01 48.29 – V C57
2020-12-18 06:34:08 s 1 +139023.30 7 +31554.286 3180.0 – C57
2020-12-18 06:44:08 S 07 03 31.673 -39 02 14.60 – V C57
2020-12-18 06:44:08 s 1 +139489.56 5 +32641.019 4300.0 – C57
2020-12-18 06:54:08 S 07 03 31.625 -39 02 43.22 – V C57
2020-12-18 06:54:08 s 1 +139949.16 1 +33726.189 7080.0 – C57
2020-12-18 07:04:08 S 07 03 31.663 -39 03 09.54 – V C57
2020-12-18 07:04:08 s 1 +140402.16 8 +34809.767 1620.0 – C57
2020-12-18 07:14:08 S 07 03 31.438 -39 03 37.98 – V C57
2020-12-18 07:14:08 s 1 +140848.66 0 +35891.724 8010.0 – C57
2020-12-18 07:24:08 S 07 03 31.512 -39 04 05.09 – V C57
2020-12-18 07:24:08 s 1 +141288.70 9 +36972.034 6350.0 – C57
2020-12-18 07:34:08 S 07 03 31.469 -39 04 31.26 – V C57
2020-12-18 07:34:08 s 1 +141722.38 5 +38050.673 6730.0 – C57
2020-12-18 07:44:08 S 07 03 31.534 -39 04 59.41 – V C57
2020-12-18 07:44:08 s 1 +142149.75 9 +39127.616 9250.0 – C57
2020-12-18 07:54:08 S 07 03 31.512 -39 05 26.45 – V C57
2020-12-18 07:54:08 s 1 +142570.90 0 +40202.838 3980.0 – C57
2020-12-18 08:04:08 S 07 03 31.313 -39 05 56.26 – 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)