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
2020-12-21 01:54:08 s 1 +111091.05 8 +320530.91 7740.0 – C57
2020-12-21 02:04:08 S 07 02 15.041 -42 04 26.11 – V C57
2020-12-21 02:04:08 s 1 +110806.70 8 +320943.37 8430.0 – C57
2020-12-21 02:14:08 S 07 02 14.654 -42 04 53.18 – V C57
2020-12-21 02:14:08 s 1 +110521.94 5 +321354.65 8660.0 – C57
2020-12-21 02:24:08 S 07 02 14.335 -42 05 19.57 – V C57
2020-12-21 02:24:08 s 1 +110236.77 0 +321764.76 8440.0 – C57
2020-12-21 02:34:08 S 07 02 14.057 -42 05 46.54 – V C57
2020-12-21 02:34:08 s 1 +109951.18 6 +322173.71 7770.0 – C57
2020-12-21 02:44:08 S 07 02 13.843 -42 06 11.63 – V C57
2020-12-21 02:44:08 s 1 +109665.19 5 +322581.49 6670.0 – C57
2020-12-21 02:54:08 S 07 02 13.534 -42 06 38.70 – V C57
2020-12-21 02:54:08 s 1 +109378.80 0 +322988.09 5120.0 – C57
2020-12-21 03:04:08 S 07 02 13.183 -42 07 06.31 – V C57
2020-12-21 03:04:08 s 1 +109092.00 1 +323393.54 3140.0 – C57
2020-12-21 03:14:08 S 07 02 12.850 -42 07 32.77 – V C57
2020-12-21 03:14:08 s 1 +108804.80 1 +323797.82 720.0 – C57
2020-12-21 03:24:08 S 07 02 12.574 -42 07 58.73 – V C57
2020-12-21 03:24:08 s 1 +108517.20 2 +324200.94 7870.0 – C57
2020-12-21 03:34:08 S 07 02 12.295 -42 08 24.18 – V C57
2020-12-21 03:34:08 s 1 +108229.20 7 +324602.90 4580.0 – C57
2020-12-21 03:44:08 S 07 02 12.094 -42 08 52.58 – V C57
2020-12-21 03:44:08 s 1 +107940.81 7 +325003.70 870.0 – C57
2020-12-21 03:54:08 S 07 02 11.772 -42 09 18.40 – V C57
2020-12-21 03:54:08 s 1 +107652.03 4 +325403.34 6730.0 – C57
2020-12-21 04:04:08 S 07 02 11.357 -42 09 46.12 – V C57
2020-12-21 04:04:08 s 1 +107362.86 0 +325801.83 2170.0 – C57
2020-12-21 04:14:08 S 07 02 11.150 -42 10 11.78 – V C57
2020-12-21 04:14:08 s 1 +107073.29 8 +326199.16 7190.0 – C57
2020-12-21 04:24:08 S 07 02 10.843 -42 10 38.28 – V C57
2020-12-21 04:24:08 s 1 +106783.34 8 +326595.34 1790.0 – C57
2020-12-21 04:34:08 S 07 02 10.586 -42 11 04.06 – V C57
2020-12-21 04:34:08 s 1 +106493.01 4 +326990.37 5970.0 – C57
2020-12-21 04:44:08 S 07 02 10.286 -42 11 30.34 – V C57
2020-12-21 04:44:08 s 1 +106202.29 7 +327384.25 9740.0 – C57
2020-12-21 04:54:08 S 07 02 09.912 -42 11 57.80 – V C57
2020-12-21 04:54:08 s 1 +105911.19 9 +327776.98 3100.0 – C57
2020-12-21 05:04:08 S 07 02 09.646 -42 12 23.90 – V C57
2020-12-21 05:04:08 s 1 +105619.72 2 +328168.57 6040.0 – C57
2020-12-21 05:14:08 S 07 02 09.274 -42 12 51.08 – V C57
2020-12-21 05:14:08 s 1 +105327.86 7 +328559.00 8590.0 – C57
2020-12-21 05:24:08 S 07 02 09.134 -42 13 17.18 – V C57
2020-12-21 05:24:08 s 1 +105035.63 8 +328948.30 720.0 – C57
2020-12-21 05:34:08 S 07 02 08.770 -42 13 44.18 – V C57
2020-12-21 05:34:08 s 1 +104743.03 6 +329336.45 2450.0 – C57
2020-12-21 05:44:08 S 07 02 08.429 -42 14 09.38 – V C57
2020-12-21 05:44:08 s 1 +104450.06 2 +329723.46 3790.0 – C57
2020-12-21 05:54:08 S 07 02 08.189 -42 14 37.03 – V C57
2020-12-21 05:54:08 s 1 +104156.71 8 +330109.33 4720.0 – C57
2020-12-21 06:04:08 S 07 02 08.033 -42 15 05.15 – 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)