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
2021-07-22 03:23:59 S 18 50 04.464 +34 06 31.39 – V C57
2021-07-22 03:23:59 s 1 -184437.38 5 +54525.332 9590.0 – C57
2021-07-22 03:33:59 S 18 50 03.811 +34 06 23.54 – V C57
2021-07-22 03:33:59 s 1 -184130.16 1 +53663.711 950.0 – C57
2021-07-22 03:43:59 S 18 50 03.331 +34 06 19.76 – V C57
2021-07-22 03:43:59 s 1 -183819.65 4 +52801.144 1970.0 – C57
2021-07-22 03:54:00 S 18 50 02.921 +34 06 11.59 – V C57
2021-07-22 03:54:00 s 1 -183505.84 3 +51937.639 2570.0 – C57
2021-07-22 04:03:59 S 18 50 02.258 +34 06 04.68 – V C57
2021-07-22 04:03:59 s 1 -183188.70 6 +51073.204 2700.0 – C57
2021-07-22 04:14:00 S 18 50 01.886 +34 05 59.14 – V C57
2021-07-22 04:14:00 s 1 -182868.22 3 +50207.846 2280.0 – C57
2021-07-22 04:23:59 S 18 50 01.447 +34 05 53.92 – V C57
2021-07-22 04:23:59 s 1 -182544.36 9 +49341.573 1240.0 – C57
2021-07-22 04:33:59 S 18 50 00.886 +34 05 47.04 – V C57
2021-07-22 04:33:59 s 1 -182217.12 5 +48474.395 9530.0 – C57
2021-07-22 04:43:59 S 18 50 00.427 +34 05 40.38 – V C57
2021-07-22 04:43:59 s 1 -181886.46 6 +47606.319 7060.0 – C57
2021-07-22 04:53:59 S 18 49 59.654 +34 05 36.06 – V C57
2021-07-22 04:53:59 s 1 -181552.37 2 +46737.354 3770.0 – C57
2021-07-22 05:03:59 S 18 49 59.393 +34 05 32.21 – V C57
2021-07-22 05:03:59 s 1 -181214.81 8 +45867.510 9590.0 – C57
2021-07-22 05:13:59 S 18 49 58.750 +34 05 22.27 – V C57
2021-07-22 05:13:59 s 1 -180873.78 2 +44996.794 4440.0 – C57
2021-07-22 05:24:00 S 18 49 58.510 +34 05 19.25 – V C57
2021-07-22 05:24:00 s 1 -180529.24 2 +44125.217 8270.0 – C57
2021-07-22 05:33:59 S 18 49 57.859 +34 05 11.98 – V C57
2021-07-22 05:33:59 s 1 -180181.17 3 +43252.788 990.0 – C57
2021-07-22 05:44:00 S 18 49 57.518 +34 05 04.27 – V C57
2021-07-22 05:44:00 s 1 -179829.55 2 +42379.517 2530.0 – C57
2021-07-22 06:03:59 S 18 49 56.287 +34 04 55.13 – V C57
2021-07-22 06:03:59 s 1 -179115.56 0 +40630.488 1780.0 – C57
2021-07-22 06:23:59 S 18 49 55.411 +34 04 42.20 – V C57
2021-07-22 06:23:59 s 1 -178387.07 2 +38878.212 5440.0 – C57
2021-07-22 06:33:59 S 18 49 54.588 +34 04 34.10 – V C57
2021-07-22 06:33:59 s 1 -178017.33 2 +38000.884 9980.0 – C57
2021-07-22 06:43:59 S 18 49 54.216 +34 04 30.29 – V C57
2021-07-22 06:43:59 s 1 -177643.89 4 +37122.776 2890.0 – C57
2021-07-22 06:54:00 S 18 49 53.683 +34 04 23.48 – V C57
2021-07-22 06:54:00 s 1 -177266.73 5 +36243.901 4100.0 – C57
2021-07-22 07:03:59 S 18 49 53.350 +34 04 16.86 – V C57
2021-07-22 07:03:59 s 1 -176885.82 7 +35364.269 3530.0 – C57
2021-07-22 07:14:00 S 18 49 52.704 +34 04 10.99 – V C57
2021-07-22 07:14:00 s 1 -176501.14 7 +34483.893 1100.0 – C57
2021-07-22 07:23:59 S 18 49 52.279 +34 04 09.80 – V C57
2021-07-22 07:23:59 s 1 -176112.66 8 +33602.786 6730.0 – C57
2021-07-22 07:33:59 S 18 49 51.732 +34 04 02.39 – V C57
2021-07-22 07:33:59 s 1 -175720.36 5 +32720.958 350.0 – C57
2021-07-22 07:43:59 S 18 49 51.228 +34 03 57.35 – V C57
2021-07-22 07:43:59 s 1 -175324.21 1 +31838.423 1860.0 – 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)