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
2019-08-01 21:23:31 C 16 24 08.19 +22 30 53.4 – q 160
2019-08-02 02:38:17 C 16 24 33.06 +22 26 25.7 – q I15
2019-08-02 02:41:22 C 16 24 33.29 +22 26 23.1 – q I15
2019-08-02 02:44:28 C 16 24 33.53 +22 26 20.2 – q I15
2019-08-03 20:34:19 C 16 27 51.22 +21 50 52.2 – q 160
2019-08-03 20:37:11 C 16 27 51.45 +21 50 50.0 – q 160
2019-08-03 20:40:07 C 16 27 51.68 +21 50 47.4 – q 160
2019-08-04 08:16:15 C 16 28 46.150 +21 41 03.91 – U F51
2019-08-04 08:51:20 C 16 28 48.813 +21 40 34.05 – U F51
2019-08-04 09:08:53 C 16 28 50.150 +21 40 19.03 – U F51
2019-08-04 09:27:27 C 16 28 51.52 +21 40 03.5 – V T05
2019-08-04 09:31:32 C 16 28 51.87 +21 39 59.7 – V T05
2019-08-04 09:40:19 C 16 28 52.55 +21 39 52.3 – V T05
2019-08-04 09:56:01 C 16 28 53.76 +21 39 38.4 – V T05
2019-08-06 21:10:06 C 16 33 31.85 +20 49 58.6 – q 160
2019-08-06 21:13:02 C 16 33 32.07 +20 49 56.1 – q 160
2019-08-06 21:15:58 C 16 33 32.23 +20 49 54.2 – q 160
2019-08-09 15:16:03 S 16 38 40.289 +19 55 25.36 – L C51
2019-08-09 15:16:14 S 16 38 40.370 +19 55 25.90 – L C51
2019-08-09 21:40:59 C 16 39 09.94 +19 50 05.9 – q 160
2019-08-09 21:43:53 C 16 39 10.14 +19 50 03.4 – q 160
2019-08-09 21:46:47 C 16 39 10.35 +19 50 01.2 – q 160
2019-08-10 20:04:49 C 16 40 54.21 +19 31 48.9 – q 160
2019-08-10 20:07:51 C 16 40 54.43 +19 31 46.3 – q 160
2019-08-10 20:10:56 C 16 40 54.65 +19 31 43.9 – q 160
2019-08-11 21:03:27 C 16 42 50.05 +19 11 31.7 – q 160
2019-08-11 21:06:33 C 16 42 50.29 +19 11 29.1 – q 160
2019-08-11 21:09:38 C 16 42 50.46 +19 11 26.5 – q 160
2019-08-14 20:01:45 C 16 48 18.98 +18 14 37.0 – q 160
2019-08-14 20:04:22 C 16 48 19.12 +18 14 35.3 – q 160
2019-08-14 20:07:00 C 16 48 19.30 +18 14 33.0 – q 160
2019-08-16 20:17:13 C 16 52 02.10 +17 36 31.4 – a 233
2019-08-16 20:23:16 C 16 52 02.49 +17 36 26.8 – a 233
2019-08-16 20:29:21 C 16 52 03.01 +17 36 21.1 – a 233
2019-08-16 20:36:05 C 16 52 03.50 +17 36 16.6 – a 233
2019-08-16 20:42:08 C 16 52 03.78 +17 36 11.8 – a 233
2019-08-18 08:06:53 C 16 54 47.49 +17 08 39.0 – V T08
2019-08-18 08:07:33 C 16 54 47.55 +17 08 38.1 – V T08
2019-08-18 08:11:34 C 16 54 47.85 +17 08 34.9 – V T08
2019-08-18 08:12:14 C 16 54 47.89 +17 08 34.7 – V T08
2019-08-18 08:20:17 C 16 54 48.53 +17 08 28.1 – V T08
2019-08-18 08:20:57 C 16 54 48.57 +17 08 27.8 – V T08
2019-08-18 08:34:57 C 16 54 49.63 +17 08 16.4 – V T08
2019-08-18 08:35:37 C 16 54 49.68 +17 08 16.1 – V T08
2019-08-18 21:00:32 C 16 55 47.20 +16 58 36.1 – q 160
2019-08-18 21:03:34 C 16 55 47.40 +16 58 33.8 – q 160
2019-08-18 21:06:35 C 16 55 47.62 +16 58 31.5 – q 160
2019-08-19 07:21:53 C 16 56 35.052 +16 50 40.53 – U F52
2019-08-19 07:39:31 C 16 56 36.374 +16 50 26.89 – U F52
2019-08-19 07:57:19 C 16 56 37.710 +16 50 13.05 – U F52
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)