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
2019-05-19 23:50:01 C 09 59 55.52 +31 30 24.1 15.4 r 238
2019-05-20 05:59:49 C 10 03 18.53 +31 54 00.6 – V T05
2019-05-20 06:08:10 C 10 03 23.03 +31 54 27.2 – V T05
2019-05-20 06:13:08 C 10 03 25.62 +31 54 48.8 – V T05
2019-05-20 06:32:21 C 10 03 35.95 +31 55 58.8 – V T05
2019-05-25 06:53:12 C 11 09 29.47 +37 42 54.1 – V T05
2019-05-25 06:57:18 C 11 09 31.60 +37 43 02.4 – V T05
2019-05-25 07:04:33 C 11 09 35.38 +37 43 17.2 – V T05
2019-05-25 07:17:08 C 11 09 41.93 +37 43 42.7 – V T05
2019-05-26 21:20:56 C 11 29 40.41 +38 53 19.7 – q 006
2019-05-26 21:22:56 C 11 29 41.44 +38 53 22.9 – q 006
2019-05-26 21:24:16 C 11 29 42.09 +38 53 25.0 – q 006
2019-05-26 21:25:56 C 11 29 42.92 +38 53 27.8 – q 006
2019-05-26 21:27:16 C 11 29 43.63 +38 53 29.5 – q 006
2019-05-26 21:29:16 C 11 29 44.62 +38 53 32.8 – q 006
2019-05-26 21:31:19 C 11 29 45.67 +38 53 35.9 – q 006
2019-05-26 21:33:39 C 11 29 46.83 +38 53 39.6 – q 006
2019-05-26 23:40:45 C 11 30 51.78 +38 56 48.3 – V Z80
2019-05-26 23:42:26 C 11 30 52.64 +38 56 51.1 – V Z80
2019-05-26 23:44:05 C 11 30 53.48 +38 56 53.4 – V Z80
2019-05-26 23:45:46 C 11 30 54.33 +38 56 56.0 – V Z80
2019-05-26 23:47:25 C 11 30 55.18 +38 56 58.7 – V Z80
2019-05-26 23:49:06 C 11 30 56.03 +38 57 01.2 – V Z80
2019-05-27 03:40:55 C 11 32 55.98 +39 03 23.1 – V G96
2019-05-27 03:49:01 C 11 33 00.01 +39 03 35.2 – V G96
2019-05-27 03:57:06 C 11 33 04.05 +39 03 47.3 – V G96
2019-05-27 04:05:12 C 11 33 08.08 +39 03 59.5 – V G96
2019-05-27 05:13:28 C 11 33 42.17 +39 05 39.7 – V 703
2019-05-27 05:21:02 C 11 33 45.96 +39 05 50.6 – V 703
2019-05-27 05:28:35 C 11 33 49.73 +39 06 01.6 – V 703
2019-05-27 05:36:09 C 11 33 53.52 +39 06 12.5 – V 703
2019-05-27 07:06:38 C 11 34 40.44 +39 08 41.1 – V T08
2019-05-27 07:11:20 C 11 34 42.76 +39 08 47.9 – V T08
2019-05-27 07:19:21 C 11 34 46.74 +39 08 59.5 – V T08
2019-05-27 07:34:00 C 11 34 54.01 +39 09 20.5 – V T08
2019-05-30 05:25:33 C 12 08 47.40 +40 26 34.0 – V 703
2019-05-30 05:34:00 C 12 08 51.19 +40 26 40.1 – V 703
2019-05-30 05:42:27 C 12 08 54.99 +40 26 45.7 – V 703
2019-05-30 05:50:54 C 12 08 58.78 +40 26 51.6 – V 703
2019-05-31 07:25:49 C 12 20 30.06 +40 43 40.4 – V T08
2019-05-31 07:29:49 C 12 20 31.76 +40 43 42.3 – V T08
2019-05-31 07:38:28 C 12 20 35.47 +40 43 46.8 – V T08
2019-05-31 07:54:31 C 12 20 42.34 +40 43 54.7 – V T08
2019-05-31 21:34:09 C 12 26 38.15 +40 50 17.7 – q 160
2019-05-31 21:36:59 C 12 26 39.32 +40 50 19.4 – q 160
2019-05-31 21:39:56 C 12 26 40.59 +40 50 20.2 – q 160
2019-05-31 22:11:39 n 12 26 54.49 +40 50 31.2 – V Z43
2019-05-31 22:33:23 n 12 27 03.62 +40 50 39.3 – V Z43
2019-05-31 22:52:26 n 12 27 11.63 +40 50 47.0 – V Z43
2019-06-01 21:25:33 C 12 36 38.74 +40 58 35.7 – q 160
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)