2015 US81

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5330913754 ± 8.83e-08
Semi-major axis (a)2.7701481872 AU ± 2.93e-08
Inclination (i)53.64111147° ± 3.42e-05
Long. of Asc. Node (Ω)93.33953690° ± 7.58e-06
Arg. of Perihelion (ω)294.90179381° ± 2.44e-05
Mean Anomaly (M)71.76017642° ± 1.41e-05
Mean Motion (n)0.2137754224°/day ± 3.40e-09
Perihelion dist (q)1.29340608 AU ± 2.45e-07
Aphelion dist (Q)4.24689029 AU ± 2.49e-07
Orbital Period4.61056876 yr ± 7.32e-08
Physical Parameters
H (abs. magnitude)18.80
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.303″
Uncertainty0
Orbit TypeAmor
MOID0.553789 AU
Observations Used78
Oppositions8
Arc Total2015-2025
First Observation Used2015-10-31
Last Observation Used2025-02-07
Observations (89)
Date Type RA Dec Mag Band Observatory
2015-12-17 08:24:18 C 06 34 50.62 +10 30 45.3 R G45
2015-12-17 08:31:05 C 06 34 49.71 +10 31 05.8 R G45
2015-12-17 08:38:37 C 06 34 48.69 +10 31 30.9 R G45
2015-12-17 08:38:48 C 06 34 48.71 +10 31 31.8 R G45
2015-12-17 08:44:41 C 06 34 47.84 +10 31 50.0 R G45
2015-12-17 08:56:38 C 06 34 46.24 +10 32 27.7 R G45
2015-12-17 09:03:30 C 06 34 45.34 +10 32 49.6 R G45
2015-12-19 09:08:02 C 06 28 20.16 +13 04 37.3 q H45
2015-12-19 09:09:25 C 06 28 19.90 +13 04 42.5 q H45
2015-12-19 09:10:43 C 06 28 19.74 +13 04 45.6 q H45
2015-12-19 09:12:08 C 06 28 19.55 +13 04 49.9 q H45
2015-12-19 09:14:02 C 06 28 19.30 +13 04 56.6 q H45
2015-12-19 09:16:35 C 06 28 18.92 +13 05 04.5 q H45
2015-12-20 00:25:02 C 06 26 16.84 +13 52 30.8 t 130
2015-12-20 00:30:03 C 06 26 16.17 +13 52 46.0 t 130
2015-12-20 00:35:03 C 06 26 15.47 +13 53 02.7 t 130
2015-12-30 07:59:10 C 05 52 54.53 +25 46 13.4 o 711
2015-12-30 08:03:22 C 05 52 53.94 +25 46 24.0 o 711
2015-12-30 08:07:54 C 05 52 53.30 +25 46 36.5 o 711
2016-02-06 02:20:25 C 04 48 11.02 +45 55 50.0 u H21
2016-02-06 02:46:00 C 04 48 10.80 +45 56 04.3 u H21
2016-02-06 03:08:31 C 04 48 10.62 +45 56 17.0 u H21
2016-02-25 03:00:12 C 04 54 54.17 +49 13 33.3 o 695
2016-02-25 03:15:21 C 04 54 54.64 +49 13 37.9 o 695
2016-02-25 03:30:30 C 04 54 55.17 +49 13 43.2 o 695
2019-06-08 09:58:12 C 17 46 56.392 -03 43 48.54 V T12
2019-06-08 10:08:58 C 17 46 55.806 -03 43 51.88 V T12
2019-06-08 10:19:54 C 17 46 55.202 -03 43 55.24 V T12
2019-06-11 09:08:28 C 17 43 03.148 -04 06 32.53 V T12
2019-06-11 09:23:27 C 17 43 02.301 -04 06 37.52 V T12
2024-06-16 11:46:21 C 20 00 13.935 -39 12 58.50 X F51
2024-06-16 11:56:36 C 20 00 13.517 -39 13 12.83 X F51
2024-06-16 12:07:11 C 20 00 13.081 -39 13 27.53 X F51
2024-06-16 12:17:37 C 20 00 12.653 -39 13 42.16 X F51
2025-02-06 03:31:13 C 02 23 28.030 -10 40 41.60 V 691
2025-02-06 04:03:00 C 02 23 30.910 -10 39 25.90 V 691
2025-02-07 02:10:50 C 02 25 32.450 -09 47 04.50 V 691
2025-02-07 02:35:34 C 02 25 34.690 -09 46 05.80 V 691
2025-02-07 03:00:17 C 02 25 36.900 -09 45 07.30 V 691