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
2021-01-02 05:34:08 S 06 51 07.214 -53 44 32.14 – V C57
2021-01-02 05:34:08 s 1 +156833.05 5 +190531.84 7740.0 – C57
2021-01-02 05:44:08 S 06 51 06.605 -53 44 55.46 – V C57
2021-01-02 05:44:08 s 1 +156729.26 7 +191275.23 2230.0 – C57
2021-01-02 05:54:08 S 06 51 06.283 -53 45 20.34 – V C57
2021-01-02 05:54:08 s 1 +156624.00 7 +192016.82 4660.0 – C57
2021-01-02 06:04:08 S 06 51 05.794 -53 45 43.70 – V C57
2021-01-02 06:04:08 s 1 +156517.28 4 +192756.61 5050.0 – C57
2021-01-02 06:14:08 S 06 51 05.342 -53 46 09.05 – V C57
2021-01-02 06:14:08 s 1 +156409.10 9 +193494.62 3410.0 – C57
2021-01-02 06:24:08 S 06 51 04.831 -53 46 32.63 – V C57
2021-01-02 06:24:08 s 1 +156299.49 1 +194230.83 9750.0 – C57
2021-01-02 06:34:08 S 06 51 04.226 -53 46 58.73 – V C57
2021-01-02 06:34:08 s 1 +156188.44 1 +194965.27 4090.0 – C57
2021-01-02 06:44:08 S 06 51 03.713 -53 47 21.98 – V C57
2021-01-02 06:44:08 s 1 +156075.96 6 +195697.92 6440.0 – C57
2021-01-02 06:54:08 S 06 51 03.242 -53 47 47.18 – V C57
2021-01-02 06:54:08 s 1 +155962.07 8 +196428.81 6820.0 – C57
2021-01-02 07:04:08 S 06 51 02.786 -53 48 11.63 – V C57
2021-01-02 07:04:08 s 1 +155846.78 4 +197157.92 5240.0 – C57
2021-01-02 07:14:08 S 06 51 02.196 -53 48 36.22 – V C57
2021-01-02 07:14:08 s 1 +155730.09 6 +197885.26 1710.0 – C57
2021-01-02 07:24:08 S 06 51 01.570 -53 49 00.44 – V C57
2021-01-02 07:24:08 s 1 +155612.02 1 +198610.85 6240.0 – C57
2021-01-02 07:34:08 S 06 51 01.130 -53 49 25.36 – V C57
2021-01-02 07:34:08 s 1 +155492.56 9 +199334.67 8850.0 – C57
2021-01-02 07:44:08 S 06 51 00.706 -53 49 49.55 – V C57
2021-01-02 07:44:08 s 1 +155371.74 9 +200056.74 9560.0 – C57
2021-01-02 07:54:08 S 06 51 00.122 -53 50 13.16 – V C57
2021-01-02 07:54:08 s 1 +155249.57 0 +200777.06 8370.0 – C57
2021-01-02 08:04:08 S 06 50 59.556 -53 50 38.18 – V C57
2021-01-02 08:04:08 s 1 +155126.04 2 +201495.63 5300.0 – C57
2021-01-02 08:14:08 S 06 50 59.110 -53 51 01.48 – V C57
2021-01-02 08:14:08 s 1 +155001.17 1 +202212.45 350.0 – C57
2021-01-02 08:24:08 S 06 50 58.630 -53 51 26.46 – V C57
2021-01-02 08:24:08 s 1 +154874.96 9 +202927.54 3550.0 – C57
2021-01-02 08:34:08 S 06 50 58.085 -53 51 51.12 – V C57
2021-01-02 08:34:08 s 1 +154747.44 2 +203640.89 4910.0 – C57
2021-01-02 08:44:08 S 06 50 57.550 -53 52 15.53 – V C57
2021-01-02 08:44:08 s 1 +154618.60 1 +204352.51 4430.0 – C57
2021-01-02 08:54:08 S 06 50 56.952 -53 52 39.97 – V C57
2021-01-02 08:54:08 s 1 +154488.45 2 +205062.40 2130.0 – C57
2021-01-02 09:04:08 S 06 50 56.542 -53 53 04.96 – V C57
2021-01-02 09:04:08 s 1 +154357.00 5 +205770.57 8020.0 – C57
2021-01-02 09:14:08 S 06 50 56.136 -53 53 29.04 – V C57
2021-01-02 09:14:08 s 1 +154224.26 9 +206477.02 2120.0 – C57
2021-01-02 09:24:08 S 06 50 55.572 -53 53 52.04 – V C57
2021-01-02 09:24:08 s 1 +154090.25 0 +207181.74 4430.0 – C57
2021-01-02 09:34:08 S 06 50 54.876 -53 54 17.86 – V C57
2021-01-02 09:34:08 s 1 +153954.95 9 +207884.76 4970.0 – 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)