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
2019-05-06 19:39:30 C 07 36 02.13 +07 43 23.4 – q 160
2019-05-07 06:35:51 C 07 39 49.13 +08 29 35.9 – V T05
2019-05-07 06:48:48 C 07 39 53.57 +08 30 30.4 – V T05
2019-05-07 07:01:47 C 07 39 58.05 +08 31 25.3 – V T05
2019-05-07 07:20:55 C 07 40 04.65 +08 32 46.1 – V T05
2019-05-08 03:19:58 C 07 47 14.22 +09 58 52.4 – V 703
2019-05-08 03:27:32 C 07 47 16.93 +09 59 25.0 – V 703
2019-05-08 03:35:07 C 07 47 19.65 +09 59 58.1 – V 703
2019-05-08 03:42:42 C 07 47 22.38 +10 00 31.3 – V 703
2019-05-08 06:05:37 C 07 48 14.78 +10 11 07.5 – V T05
2019-05-08 06:08:23 C 07 48 15.77 +10 11 19.9 – V T05
2019-05-08 06:17:56 C 07 48 19.20 +10 12 01.7 – V T05
2019-05-08 06:40:37 C 07 48 27.34 +10 13 40.8 – V T05
2019-05-12 06:46:00 C 08 27 10.97 +17 39 48.4 – V T05
2019-05-12 06:50:04 C 08 27 12.71 +17 40 07.8 – V T05
2019-05-12 06:58:44 C 08 27 16.44 +17 40 49.0 – V T05
2019-05-12 07:19:20 C 08 27 25.35 +17 42 27.0 – V T05
2019-05-14 04:35:50 C 08 48 06.71 +21 20 03.8 – V 703
2019-05-14 04:43:29 C 08 48 10.29 +21 20 40.0 – V 703
2019-05-14 04:51:09 C 08 48 13.88 +21 21 16.3 – V 703
2019-05-14 04:58:48 C 08 48 17.40 +21 21 52.6 – V 703
2019-05-14 07:06:54 C 08 49 18.35 +21 32 18.0 – V T08
2019-05-14 07:10:59 C 08 49 20.25 +21 32 37.2 – V T08
2019-05-14 07:18:25 C 08 49 23.73 +21 33 12.4 – V T08
2019-05-14 07:32:30 C 08 49 30.32 +21 34 18.9 – V T08
2019-05-14 21:59:53 C 08 56 28.07 +22 42 45.4 – V Z80
2019-05-14 22:01:22 C 08 56 28.80 +22 42 52.6 – V Z80
2019-05-14 22:02:53 C 08 56 29.54 +22 42 59.4 – V Z80
2019-05-14 22:04:23 C 08 56 30.27 +22 43 06.7 – V Z80
2019-05-14 22:05:52 C 08 56 31.00 +22 43 13.7 – V Z80
2019-05-14 22:07:23 C 08 56 31.72 +22 43 21.0 – V Z80
2019-05-14 22:08:53 C 08 56 32.44 +22 43 27.7 – V Z80
2019-05-14 22:10:22 C 08 56 33.16 +22 43 34.8 – V Z80
2019-05-14 22:11:53 C 08 56 33.89 +22 43 41.9 – V Z80
2019-05-14 22:13:23 C 08 56 34.62 +22 43 48.8 – V Z80
2019-05-15 20:17:58 C 09 07 28.30 +24 27 34.7 – q 160
2019-05-15 20:20:51 C 09 07 29.71 +24 27 48.5 – q 160
2019-05-15 20:23:44 C 09 07 31.14 +24 28 01.7 – q 160
2019-05-16 21:23:45 C 09 20 13.91 +26 22 07.4 – V A16
2019-05-16 21:23:45 C 09 20 13.98 +26 22 07.6 – V A16
2019-05-16 21:34:06 C 09 20 19.26 +26 22 53.7 – V A16
2019-05-16 21:44:27 C 09 20 24.65 +26 23 39.6 – V A16
2019-05-16 21:54:46 C 09 20 29.85 +26 24 24.7 – V A16
2019-05-16 22:05:07 C 09 20 35.16 +26 25 10.5 – V A16
2019-05-16 22:10:17 C 09 20 37.82 +26 25 33.3 – V A16
2019-05-16 22:15:28 C 09 20 40.51 +26 25 56.5 – V A16
2019-05-16 22:25:47 C 09 20 45.77 +26 26 41.9 – V A16
2019-05-16 22:35:05 C 09 20 50.56 +26 27 22.7 – V A16
2019-05-19 23:39:08 C 09 59 49.61 +31 29 45.0 15.6 r 238
2019-05-19 23:45:21 C 09 59 52.98 +31 30 07.3 15.5 r 238
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)