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
2021-01-02 01:24:08 S 06 51 19.723 -53 34 19.02 – V C57
2021-01-02 01:24:08 s 1 +158918.36 1 +171351.00 2140.0 – C57
2021-01-02 01:34:08 S 06 51 19.186 -53 34 42.74 – V C57
2021-01-02 01:34:08 s 1 +158854.88 2 +172140.66 3130.0 – C57
2021-01-02 01:44:08 S 06 51 18.658 -53 35 08.70 – V C57
2021-01-02 01:44:08 s 1 +158789.65 0 +172928.41 1650.0 – C57
2021-01-02 01:54:08 S 06 51 18.286 -53 35 32.35 – V C57
2021-01-02 01:54:08 s 1 +158722.67 8 +173714.27 7730.0 – C57
2021-01-02 02:04:08 S 06 51 17.810 -53 35 56.29 – V C57
2021-01-02 02:04:08 s 1 +158653.97 9 +174498.24 1380.0 – C57
2021-01-02 02:14:08 S 06 51 17.268 -53 36 20.70 – V C57
2021-01-02 02:14:08 s 1 +158583.56 5 +175280.32 2630.0 – C57
2021-01-02 02:24:08 S 06 51 16.759 -53 36 45.94 – V C57
2021-01-02 02:24:08 s 1 +158511.44 9 +176060.52 1480.0 – C57
2021-01-02 02:34:08 S 06 51 16.128 -53 37 09.88 – V C57
2021-01-02 02:34:08 s 1 +158437.64 1 +176838.84 7960.0 – C57
2021-01-02 02:44:08 S 06 51 15.804 -53 37 35.33 – V C57
2021-01-02 02:44:08 s 1 +158362.15 4 +177615.28 2090.0 – C57
2021-01-02 02:54:08 S 06 51 15.242 -53 37 59.48 – V C57
2021-01-02 02:54:08 s 1 +158285.00 1 +178389.85 3880.0 – C57
2021-01-02 03:04:08 S 06 51 14.806 -53 38 24.00 – V C57
2021-01-02 03:04:08 s 1 +158206.19 2 +179162.55 3340.0 – C57
2021-01-02 03:14:08 S 06 51 14.234 -53 38 48.95 – V C57
2021-01-02 03:14:08 s 1 +158125.74 0 +179933.39 500.0 – C57
2021-01-02 03:24:08 S 06 51 13.781 -53 39 13.54 – V C57
2021-01-02 03:24:08 s 1 +158043.65 5 +180702.38 5380.0 – C57
2021-01-02 03:34:08 S 06 51 13.361 -53 39 36.94 – V C57
2021-01-02 03:34:08 s 1 +157959.94 9 +181469.50 7980.0 – C57
2021-01-02 03:44:08 S 06 51 12.914 -53 40 01.42 – V C57
2021-01-02 03:44:08 s 1 +157874.63 4 +182234.78 8320.0 – C57
2021-01-02 03:54:08 S 06 51 12.154 -53 40 27.16 – V C57
2021-01-02 03:54:08 s 1 +157787.72 0 +182998.21 6430.0 – C57
2021-01-02 04:04:08 S 06 51 11.676 -53 40 51.10 – V C57
2021-01-02 04:04:08 s 1 +157699.21 9 +183759.80 2310.0 – C57
2021-01-02 04:14:08 S 06 51 11.297 -53 41 16.48 – V C57
2021-01-02 04:14:08 s 1 +157609.14 2 +184519.55 5990.0 – C57
2021-01-02 04:24:08 S 06 51 10.834 -53 41 40.38 – V C57
2021-01-02 04:24:08 s 1 +157517.49 9 +185277.46 7470.0 – C57
2021-01-02 04:34:08 S 06 51 10.428 -53 42 04.90 – V C57
2021-01-02 04:34:08 s 1 +157424.30 1 +186033.54 6770.0 – C57
2021-01-02 04:44:08 S 06 51 09.785 -53 42 28.55 – V C57
2021-01-02 04:44:08 s 1 +157329.56 0 +186787.80 3920.0 – C57
2021-01-02 04:54:08 S 06 51 09.130 -53 42 53.64 – V C57
2021-01-02 04:54:08 s 1 +157233.28 4 +187540.24 8910.0 – C57
2021-01-02 05:04:08 S 06 51 08.791 -53 43 19.20 – V C57
2021-01-02 05:04:08 s 1 +157135.48 6 +188290.86 1780.0 – C57
2021-01-02 05:14:08 S 06 51 08.270 -53 43 43.07 – V C57
2021-01-02 05:14:08 s 1 +157036.17 5 +189039.66 2530.0 – C57
2021-01-02 05:24:08 S 06 51 07.898 -53 44 07.51 – V C57
2021-01-02 05:24:08 s 1 +156935.36 1 +189786.66 1180.0 – 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)