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
2019-07-01 05:25:14 C 15 13 57.77 +33 40 09.1 – V 654
2019-07-01 05:55:43 C 15 14 01.11 +33 39 41.7 – V 703
2019-07-01 06:03:21 C 15 14 02.03 +33 39 35.5 – V 703
2019-07-01 06:10:58 C 15 14 02.85 +33 39 28.2 – V 703
2019-07-01 07:08:23 C 15 14 09.65 +33 38 36.6 – V 654
2019-07-01 09:37:10 C 15 14 27.34 +33 36 29.7 – V T08
2019-07-01 09:41:20 C 15 14 27.83 +33 36 25.9 – V T08
2019-07-01 09:52:34 C 15 14 29.11 +33 36 15.7 – V T08
2019-07-01 10:08:45 C 15 14 30.97 +33 36 01.1 – V T08
2019-07-01 22:00:03 C 15 15 55.65 +33 25 27.7 – q 160
2019-07-01 22:02:59 C 15 15 56.01 +33 25 25.6 – q 160
2019-07-01 22:05:56 C 15 15 56.36 +33 25 22.9 – q 160
2019-07-02 21:54:49 C 15 18 42.50 +33 04 18.9 – q 160
2019-07-02 21:57:43 C 15 18 42.82 +33 04 16.3 – q 160
2019-07-02 22:00:38 C 15 18 43.14 +33 04 13.7 – q 160
2019-07-02 22:16:54 C 15 18 45.20 +33 03 57.3 – V Z80
2019-07-02 22:19:24 C 15 18 45.44 +33 03 55.0 – V Z80
2019-07-02 22:21:55 C 15 18 45.75 +33 03 52.6 – V Z80
2019-07-02 22:24:25 C 15 18 46.00 +33 03 50.4 – V Z80
2019-07-03 21:55:37 n 15 21 26.11 +32 43 00.8 – V Z43
2019-07-03 22:13:39 n 15 21 28.07 +32 42 44.3 – V Z43
2019-07-03 22:26:33 n 15 21 29.47 +32 42 32.6 – V Z43
2019-07-03 22:38:55 n 15 21 30.81 +32 42 21.7 – V Z43
2019-07-03 22:51:27 n 15 21 32.17 +32 42 10.6 – V Z43
2019-07-05 04:19:55 C 15 24 47.91 +32 16 03.9 – U I41
2019-07-05 04:21:16 C 15 24 48.05 +32 16 02.7 – U I41
2019-07-05 07:04:49 C 15 25 05.10 +32 13 35.4 – U I41
2019-07-05 07:05:30 C 15 25 05.17 +32 13 34.7 – U I41
2019-07-05 07:34:01 C 15 25 08.02 +32 13 08.4 – V 719
2019-07-05 07:40:27 C 15 25 08.74 +32 13 01.7 – V 719
2019-07-07 09:10:21 C 15 30 24.25 +31 29 02.9 – V T08
2019-07-07 09:15:06 C 15 30 24.73 +31 28 58.7 – V T08
2019-07-07 09:24:50 C 15 30 25.69 +31 28 49.5 – V T08
2019-07-07 09:39:19 C 15 30 27.15 +31 28 36.4 – V T08
2019-07-07 11:21:02 S 15 30 38.77 +31 27 03.8 – L C51
2019-07-07 14:29:32 S 15 30 58.28 +31 24 15.5 – L C51
2019-07-07 17:37:51 S 15 31 17.731 +31 21 27.61 – L C51
2019-07-07 20:46:21 S 15 31 37.13 +31 18 39.5 – L C51
2019-07-07 22:33:06 C 15 31 47.44 +31 17 02.2 – V J27
2019-07-07 22:37:57 C 15 31 47.92 +31 16 57.5 – V J27
2019-07-07 22:46:01 C 15 31 48.74 +31 16 50.0 – V J27
2019-07-07 23:54:41 S 15 31 56.53 +31 15 51.5 – L C51
2019-07-08 03:02:15 S 15 32 15.76 +31 13 05.1 – L C51
2019-07-08 03:02:26 S 15 32 15.76 +31 13 04.9 – L C51
2019-07-08 05:12:14 C 15 32 28.42 +31 11 08.5 – V 703
2019-07-08 05:20:24 C 15 32 29.20 +31 11 01.1 – V 703
2019-07-08 05:28:37 C 15 32 30.02 +31 10 53.8 – V 703
2019-07-08 05:36:47 C 15 32 30.84 +31 10 46.9 – V 703
2019-07-08 06:11:30 S 15 32 35.10 +31 10 15.1 – L C51
2019-07-08 07:22:22 C 15 32 41.921 +31 09 15.94 – U F51
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)