2009 US87

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2396996124 ± 5.26e-07
Semi-major axis (a)1.6402057567 AU ± 1.26e-06
Inclination (i)0.53686550° ± 9.16e-06
Long. of Asc. Node (Ω)104.68372182° ± 9.24e-04
Arg. of Perihelion (ω)323.10678813° ± 1.96e-03
Mean Anomaly (M)217.66081285° ± 4.05e-03
Mean Motion (n)0.4692073196°/day ± 5.42e-07
Perihelion dist (q)1.24704907 AU ± 1.29e-06
Aphelion dist (Q)2.03336244 AU ± 1.79e-06
Orbital Period2.10062001 yr ± 2.43e-06
Physical Parameters
H (abs. magnitude)22.01
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.431″
Uncertainty1
Orbit TypeAmor
MOID0.259691 AU
Observations Used63
Oppositions1
Arc Total2009-2011
First Observation Used2009-10-23
Last Observation Used2011-09-18
Observations (65)
Date Type RA Dec Mag Band Observatory
2010-01-04 07:36:27 C 04 25 38.33 +21 19 36.0 o 291
2010-01-04 07:44:41 C 04 25 38.67 +21 19 37.0 o 291
2010-01-04 07:52:53 C 04 25 39.03 +21 19 38.3 o 291
2010-01-05 04:28:20 C 04 26 33.68 +21 23 12.9 o 291
2010-01-05 04:36:51 C 04 26 33.99 +21 23 14.3 o 291
2010-01-05 04:45:16 C 04 26 34.34 +21 23 16.3 o 291
2011-08-27 06:25:27 C 23 16 58.30 -05 58 21.6 o H21
2011-08-27 06:50:20 C 23 16 57.29 -05 58 28.3 o H21
2011-08-27 07:16:25 C 23 16 56.22 -05 58 35.7 o H21
2011-08-28 06:16:36 C 23 16 04.39 -06 05 07.5 o H21
2011-08-28 06:43:50 C 23 16 03.29 -06 05 16.0 o H21
2011-08-28 07:12:33 C 23 16 02.15 -06 05 23.9 o H21
2011-09-18 07:50:59 C 22 51 40.45 -08 54 14.4 o 291
2011-09-18 08:16:42 C 22 51 39.16 -08 54 23.9 o 291
2011-09-18 08:21:59 C 22 51 38.77 -08 54 24.4 o 291