89136 (2001 US16)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2527917081 ± 2.00e+00
Semi-major axis (a)1.3559247666 AU ± 3.00e+00
Inclination (i)1.90586628° ± 4.00e+00
Long. of Asc. Node (Ω)175.89512420° ± 5.00e+00
Arg. of Perihelion (ω)67.20134426° ± 6.00e+00
Mean Anomaly (M)222.31602461° ± 6.22e-06
Mean Motion (n)0.6242504816°/day ± 2.07e+00
Perihelion dist (q)1.01315823 AU ± 3.52e+00
Aphelion dist (Q)1.69869130 AU ± 4.63e+00
Orbital Period1.57889551 yr ± 5.24e+00
NGA Modelr2
A23.46177527e-06 AU/d²
Physical Parameters
H (abs. magnitude)20.27
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-27
RMS Residual0.374″
Uncertainty0
Orbit TypeApollo
MOID0.028467 AU
Observations Used1359
Oppositions9
Arc Total2001-2026
First Observation Used2001-10-18
Last Observation Used2026-01-13
Observations (1410)
Date Type RA Dec Mag Band Observatory
2026-01-12 16:55:35 C 07 45 09.64 +16 21 06.0 V D29
2026-01-12 16:56:51 C 07 45 09.51 +16 21 06.3 V D29
2026-01-12 17:15:57 C 07 45 07.86 +16 21 10.6 V D29
2026-01-12 17:17:13 C 07 45 07.76 +16 21 10.3 V D29
2026-01-12 17:36:18 C 07 45 05.91 +16 21 14.9 V D29
2026-01-12 17:37:35 C 07 45 05.88 +16 21 15.4 V D29
2026-01-13 08:14:34 C 07 43 52.756 +16 24 26.91 X F51
2026-01-13 08:28:36 C 07 43 51.513 +16 24 30.21 X F51
2026-01-13 08:42:59 C 07 43 50.232 +16 24 33.40 X F51
2026-01-13 08:57:16 C 07 43 48.959 +16 24 36.61 X F51
Radar Observations (4)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2004-04-28 03:00:00 37745971.83 1 us 2380 -1 -1
2004-04-28 03:00:00 44360.4701 0.2 Hz 2380 -1 -1
2004-04-29 03:22:00 36194545.1 1 us 2380 -1 -1
2004-04-29 03:22:00 41214.5742 0.1 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)