1999 UR

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5039915044 ± 4.13e-08
Semi-major axis (a)1.8984308907 AU ± 3.76e-09
Inclination (i)3.59197597° ± 9.53e-06
Long. of Asc. Node (Ω)50.64167789° ± 7.70e-05
Arg. of Perihelion (ω)18.26079857° ± 7.29e-05
Mean Anomaly (M)338.15204209° ± 1.59e-05
Mean Motion (n)0.3768079770°/day ± 1.12e-09
Perihelion dist (q)0.94163785 AU ± 7.85e-08
Aphelion dist (Q)2.85522393 AU ± 7.87e-08
Orbital Period2.61572563 yr ± 7.78e-09
Physical Parameters
H (abs. magnitude)21.50
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.501″
Uncertainty0
Orbit TypeApollo
MOID0.014621 AU
Observations Used75
Oppositions9
Arc Total1999-2013
First Observation Used1999-10-16
Last Observation Used2013-02-13
Observations (77)
Date Type RA Dec Mag Band Observatory
1999-10-19 12:30:30 C 04 58 04.87 -07 56 26.8 i 670
1999-10-19 12:31:52 C 04 58 06.21 -07 56 23.1 i 670
1999-10-20 18:23:47 C 05 29 46.60 -06 33 22.4 z 402
1999-10-20 18:27:25 C 05 29 50.38 -06 33 11.6 z 402
1999-10-20 18:29:13 C 05 29 52.38 -06 33 05.7 z 402
1999-11-04 18:00:38 C 10 12 41.59 +08 02 26.6 413
1999-11-04 18:02:58 C 10 12 42.41 +08 02 29.3 413
1999-11-09 15:36:49 C 10 45 35.42 +09 06 59.7 568
1999-11-13 15:38:06 C 11 04 23.94 +09 32 12.2 568
2000-02-07 15:37:40 C 12 17 11.89 +10 50 13.2 413
2000-02-07 15:41:49 C 12 17 11.59 +10 50 14.3 413
2000-02-07 15:47:15 C 12 17 11.18 +10 50 16.7 413
2000-02-07 15:52:35 C 12 17 10.83 +10 50 18.2 413
2000-02-07 16:01:46 C 12 17 10.06 +10 50 22.8 413
2000-02-08 16:24:41 C 12 15 28.15 +10 59 34.4 413
2000-02-10 17:43:08 C 12 11 53.06 +11 18 13.8 413
2012-11-23 02:14:36 C 21 29 40.20 -17 02 06.7 o 291
2012-11-23 02:35:41 C 21 29 42.07 -17 01 48.4 o 291
2012-11-23 02:56:42 C 21 29 43.96 -17 01 29.8 o 291
2012-11-24 01:42:36 C 21 31 52.76 -16 41 40.7 o 291
2012-11-24 02:11:17 C 21 31 55.32 -16 41 15.8 o 291
2013-01-05 02:37:55 C 23 56 40.27 +10 35 50.7 o 291
2013-01-05 02:41:04 C 23 56 41.01 +10 35 59.8 o 291
2013-01-05 02:44:01 C 23 56 41.68 +10 36 07.6 o 291
2013-02-13 21:29:38 C 05 58 30.55 +38 16 59.3 t 204
2013-02-13 22:01:58 C 05 58 40.21 +38 16 40.6 t 204
2013-02-13 22:35:36 C 05 58 50.21 +38 16 18.7 t 204