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
2018-12-01 07:14:39 s 1 +117841.02 4 +244613.54 6720.0 – C57
2018-12-01 07:44:39 S 04 08 08.786 -07 13 18.66 – V C57
2018-12-01 07:44:39 s 1 +117124.00 6 +246341.17 2390.0 – C57
2018-12-01 08:14:39 S 04 08 06.305 -07 14 02.76 – V C57
2018-12-01 08:14:39 s 1 +116400.87 6 +248055.79 6050.0 – C57
2018-12-01 08:44:39 S 04 08 03.725 -07 14 45.89 – V C57
2018-12-01 08:44:39 s 1 +115671.74 2 +249757.47 8410.0 – C57
2018-12-01 09:14:39 S 04 08 00.998 -07 15 31.79 – V C57
2018-12-01 09:14:39 s 1 +114936.71 0 +251446.25 150.0 – C57
2018-12-01 09:44:39 S 04 07 58.478 -07 16 17.44 – V C57
2018-12-01 09:44:39 s 1 +114195.88 5 +253122.20 1940.0 – C57
2018-12-01 10:14:39 S 04 07 55.805 -07 17 03.44 – V C57
2018-12-01 10:14:39 s 1 +113449.36 8 +254785.37 4460.0 – C57
2018-12-01 10:44:39 S 04 07 53.234 -07 17 46.00 – V C57
2018-12-01 10:44:39 s 1 +112697.26 1 +256435.82 8350.0 – C57
2018-12-01 11:14:39 S 04 07 50.714 -07 18 29.23 – V C57
2018-12-01 11:14:39 s 1 +111939.66 2 +258073.60 4270.0 – C57
2018-12-01 11:44:39 S 04 07 48.010 -07 19 15.56 – V C57
2018-12-01 11:44:39 s 1 +111176.66 8 +259698.76 2830.0 – C57
2018-12-01 12:14:39 S 04 07 45.442 -07 19 58.58 – V C57
2018-12-01 12:14:39 s 1 +110408.37 3 +261311.37 4660.0 – C57
2018-12-01 12:44:39 S 04 07 42.833 -07 20 42.86 – V C57
2018-12-01 12:44:39 s 1 +109634.87 2 +262911.47 380.0 – C57
2018-12-01 13:14:39 S 04 07 40.183 -07 21 27.61 – V C57
2018-12-01 13:14:39 s 1 +108856.30 1 +264499.16 6670.0 – C57
2018-12-01 13:44:39 S 04 07 37.625 -07 22 11.60 – V C57
2018-12-01 13:44:39 s 1 +108072.66 2 +266074.41 1950.0 – C57
2018-12-01 14:14:39 S 04 07 35.042 -07 22 56.35 – V C57
2018-12-01 14:14:39 s 1 +107284.08 7 +267637.32 2890.0 – C57
2018-12-01 14:44:39 S 04 07 32.467 -07 23 39.73 – V C57
2018-12-01 14:44:39 s 1 +106490.66 2 +269187.94 40.0 – C57
2018-12-01 15:14:39 S 04 07 29.950 -07 24 22.72 – V C57
2018-12-01 15:14:39 s 1 +105692.47 3 +270726.31 3980.0 – C57
2018-12-01 15:44:39 S 04 07 27.238 -07 25 09.88 – V C57
2018-12-01 15:44:39 s 1 +104889.60 5 +272252.49 5250.0 – C57
2018-12-01 16:14:39 S 04 07 24.756 -07 25 51.92 – V C57
2018-12-01 16:14:39 s 1 +104082.13 9 +273766.52 4390.0 – C57
2018-12-01 16:44:39 S 04 07 22.006 -07 26 37.57 – V C57
2018-12-01 16:44:39 s 1 +103270.15 7 +275268.47 1950.0 – C57
2018-12-01 17:14:39 S 04 07 19.466 -07 27 21.56 – V C57
2018-12-01 17:14:39 s 1 +102453.73 9 +276758.37 8430.0 – C57
2018-12-01 17:44:39 S 04 07 16.858 -07 28 05.66 – V C57
2018-12-01 17:44:39 s 1 +101632.96 2 +278236.28 4380.0 – C57
2018-12-01 18:14:39 S 04 07 14.206 -07 28 50.59 – V C57
2018-12-01 18:14:39 s 1 +100807.90 5 +279702.24 280.0 – C57
2018-12-01 18:44:39 S 04 07 11.686 -07 29 34.08 – V C57
2018-12-01 18:44:39 s 1 +99978.643 0 +281156.31 6650.0 – C57
2018-12-01 19:14:39 S 04 07 09.120 -07 30 17.71 – V C57
2018-12-01 19:14:39 s 1 +99145.251 0 +282598.53 3980.0 – C57
2018-12-01 19:44:39 S 04 07 06.377 -07 31 01.27 – V 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)