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
2018-11-17 06:49:26 C 04 32 21.80 +01 26 39.7 – V 703
2018-11-17 06:57:08 C 04 32 21.30 +01 26 28.2 – V 703
2018-11-17 07:14:39 S 04 32 28.399 +01 22 48.68 – V C57
2018-11-17 07:14:39 s 1 +139234.78 5 +179250.47 0.268 – C57
2018-11-17 07:44:39 S 04 32 26.508 +01 22 04.76 – V C57
2018-11-17 07:44:39 s 1 +138760.92 3 +181424.81 0.419 – C57
2018-11-17 08:14:39 S 04 32 24.482 +01 21 18.90 – V C57
2018-11-17 08:14:39 s 1 +138275.69 5 +183584.30 0.09 – C57
2018-11-17 08:44:39 S 04 32 22.385 +01 20 32.86 – V C57
2018-11-17 08:44:39 s 1 +137779.31 4 +185728.98 0.412 – C57
2018-11-17 09:14:39 S 04 32 20.357 +01 19 48.68 – V C57
2018-11-17 09:14:39 s 1 +137271.98 9 +187858.92 0.514 – C57
2018-11-17 09:44:39 S 04 32 18.427 +01 19 02.50 – V C57
2018-11-17 09:44:39 s 1 +136753.92 5 +189974.18 0.522 – C57
2018-11-17 10:14:39 S 04 32 16.349 +01 18 17.68 – V C57
2018-11-17 10:14:39 s 1 +136225.32 0 +192074.79 0.558 – C57
2018-11-17 10:44:39 S 04 32 14.326 +01 17 32.50 – V C57
2018-11-17 10:44:39 s 1 +135686.37 1 +194160.82 0.744 – C57
2018-11-17 11:14:39 S 04 32 12.326 +01 16 47.96 – V C57
2018-11-17 11:14:39 s 1 +135137.26 8 +196232.33 0.198 – C57
2018-11-17 11:44:39 S 04 32 10.315 +01 16 02.78 – V C57
2018-11-17 11:44:39 s 1 +134578.19 8 +198289.38 0.035 – C57
2018-11-17 12:14:39 S 04 32 08.138 +01 15 17.42 – V C57
2018-11-17 12:14:39 s 1 +134009.34 3 +200332.01 0.37 – C57
2018-11-17 12:44:39 S 04 32 06.293 +01 14 30.80 – V C57
2018-11-17 12:44:39 s 1 +133430.88 3 +202360.28 0.312 – C57
2018-11-17 13:14:39 S 04 32 04.224 +01 13 45.77 – V C57
2018-11-17 13:14:39 s 1 +132842.99 1 +204374.26 0.973 – C57
2018-11-17 13:44:39 S 04 32 02.280 +01 13 02.35 – V C57
2018-11-17 13:44:39 s 1 +132245.83 9 +206373.99 0.457 – C57
2018-11-17 14:14:39 S 04 32 00.134 +01 12 15.05 – V C57
2018-11-17 14:14:39 s 1 +131639.59 5 +208359.54 0.87 – C57
2018-11-17 14:44:39 S 04 31 58.061 +01 11 30.48 – V C57
2018-11-17 14:44:39 s 1 +131024.42 3 +210330.96 0.314 – C57
2018-11-17 15:14:39 S 04 31 56.035 +01 10 45.70 – V C57
2018-11-17 15:14:39 s 1 +130400.48 2 +212288.30 0.891 – C57
2018-11-17 15:44:39 S 04 31 53.974 +01 09 59.04 – V C57
2018-11-17 15:44:39 s 1 +129767.93 1 +214231.63 0.698 – C57
2018-11-17 16:14:39 S 04 31 52.075 +01 09 18.07 – V C57
2018-11-17 16:14:39 s 1 +129126.92 2 +216161.00 0.833 – C57
2018-11-17 17:14:39 S 04 31 47.897 +01 07 43.46 – V C57
2018-11-17 17:14:39 s 1 +127820.13 7 +219978.08 0.464 – C57
2018-11-17 18:44:39 S 04 31 42.058 +01 05 35.66 – V C57
2018-11-17 18:44:39 s 1 +125799.91 1 +225600.64 0.503 – C57
2018-11-17 19:14:39 S 04 31 39.710 +01 04 43.86 – V C57
2018-11-17 19:14:39 s 1 +125111.22 2 +227447.42 0.535 – C57
2018-11-17 20:44:39 S 04 31 33.545 +01 02 28.72 – V C57
2018-11-17 20:44:39 s 1 +123000.90 0 +232906.57 0.696 – C57
2018-11-17 21:14:39 S 04 31 31.526 +01 01 43.61 – V C57
2018-11-17 21:14:39 s 1 +122283.13 5 +234699.41 0.045 – 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)