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
2021-02-04 15:14:07 s 1 -136901.53 1 +343003.41 5930.0 – C57
2021-02-04 15:24:07 S 04 54 28.817 -78 20 26.95 – V C57
2021-02-04 15:24:07 s 1 -137177.52 6 +342707.29 6350.0 – C57
2021-02-04 15:34:07 S 04 54 25.188 -78 20 40.16 – V C57
2021-02-04 15:34:07 s 1 -137453.13 2 +342410.21 6140.0 – C57
2021-02-04 15:44:07 S 04 54 20.902 -78 20 53.45 – V C57
2021-02-04 15:44:07 s 1 -137728.34 9 +342112.16 5290.0 – C57
2021-02-04 15:54:07 S 04 54 17.141 -78 21 07.42 – V C57
2021-02-04 15:54:07 s 1 -138003.17 4 +341813.15 3810.0 – C57
2021-02-04 16:04:07 S 04 54 12.746 -78 21 20.70 – V C57
2021-02-04 16:04:07 s 1 -138277.60 7 +341513.18 1680.0 – C57
2021-02-04 16:14:07 S 04 54 08.842 -78 21 34.96 – V C57
2021-02-04 16:14:07 s 1 -138551.64 6 +341212.24 8900.0 – C57
2021-02-04 16:24:07 S 04 54 04.831 -78 21 47.45 – V C57
2021-02-04 16:24:07 s 1 -138825.29 0 +340910.33 5480.0 – C57
2021-02-04 16:34:07 S 04 54 00.598 -78 22 00.70 – V C57
2021-02-04 16:34:07 s 1 -139098.53 7 +340607.46 1410.0 – C57
2021-02-04 16:44:07 S 04 53 56.462 -78 22 14.56 – V C57
2021-02-04 16:44:07 s 1 -139371.38 6 +340303.62 6690.0 – C57
2021-02-04 16:54:07 S 04 53 52.987 -78 22 27.98 – V C57
2021-02-04 16:54:07 s 1 -139643.83 6 +339998.82 1310.0 – C57
2021-02-04 17:04:07 S 04 53 48.605 -78 22 40.26 – V C57
2021-02-04 17:04:07 s 1 -139915.88 6 +339693.04 5270.0 – C57
2021-02-04 17:14:07 S 04 53 44.842 -78 22 54.62 – V C57
2021-02-04 17:14:07 s 1 -140187.53 3 +339386.30 8580.0 – C57
2021-02-04 17:24:07 S 04 53 40.570 -78 23 07.15 – V C57
2021-02-04 17:24:07 s 1 -140458.77 8 +339078.59 1220.0 – C57
2021-02-04 17:34:07 S 04 53 37.094 -78 23 21.05 – V C57
2021-02-04 17:34:07 s 1 -140729.61 7 +338769.92 3200.0 – C57
2021-02-04 17:44:07 S 04 53 32.784 -78 23 34.33 – V C57
2021-02-04 17:44:07 s 1 -141000.05 1 +338460.27 4510.0 – C57
2021-02-04 17:54:07 S 04 53 28.805 -78 23 48.48 – V C57
2021-02-04 17:54:07 s 1 -141270.07 7 +338149.65 5160.0 – C57
2021-02-04 18:44:07 S 04 53 05.724 -78 24 40.68 – V C57
2021-02-04 18:44:07 s 1 -142614.05 1 +336582.00 8240.0 – C57
2021-02-04 19:04:07 S 04 52 59.962 -78 25 23.77 – V C57
2021-02-04 19:04:07 s 1 -143148.74 1 +335948.13 700.0 – C57
2021-02-04 19:14:07 S 04 52 56.335 -78 25 35.22 – V C57
2021-02-04 19:14:07 s 1 -143415.45 9 +335629.73 5890.0 – C57
2021-02-04 19:24:07 S 04 52 51.667 -78 25 48.00 – V C57
2021-02-04 19:24:07 s 1 -143681.75 7 +335310.36 390.0 – C57
2021-02-04 19:34:07 S 04 52 48.106 -78 26 01.93 – V C57
2021-02-04 19:34:07 s 1 -143947.63 4 +334990.02 4200.0 – C57
2021-02-04 19:44:07 S 04 52 43.992 -78 26 14.39 – V C57
2021-02-04 19:44:07 s 1 -144213.08 8 +334668.70 7310.0 – C57
2021-02-04 19:54:07 S 04 52 39.432 -78 26 28.00 – V C57
2021-02-04 19:54:07 s 1 -144478.11 8 +334346.40 9720.0 – C57
2021-02-04 20:04:07 S 04 52 35.237 -78 26 39.95 – V C57
2021-02-04 20:04:07 s 1 -144742.72 3 +334023.12 1430.0 – C57
2021-02-04 20:14:07 S 04 52 31.190 -78 26 54.24 – 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)