251722 (1997 US2)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6609766826 ± 3.65e-08
Semi-major axis (a)1.6747840832 AU ± 2.90e-09
Inclination (i)3.17093796° ± 9.10e-06
Long. of Asc. Node (Ω)65.87860866° ± 6.24e-05
Arg. of Perihelion (ω)100.33020846° ± 6.28e-05
Mean Anomaly (M)297.51524956° ± 6.90e-06
Mean Motion (n)0.4547513940°/day ± 1.18e-09
Perihelion dist (q)0.56779086 AU ± 6.11e-08
Aphelion dist (Q)2.78177731 AU ± 6.13e-08
Orbital Period2.16739585 yr ± 5.63e-09
Physical Parameters
H (abs. magnitude)19.83
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.495″
Uncertainty0
Orbit TypeApollo
MOID0.006194 AU
Observations Used270
Oppositions15
Arc Total1997-2025
First Observation Used1997-10-23
Last Observation Used2025-10-20
Observations (282)
Date Type RA Dec Mag Band Observatory
2010-12-02 05:13:58 C 01 01 40.40 +04 41 34.9 r 703
2010-12-02 05:23:10 C 01 01 38.20 +04 41 24.2 r 703
2010-12-02 05:24:31 C 01 01 37.92 +04 41 23.4 r 703
2010-12-02 05:25:49 C 01 01 37.59 +04 41 22.8 r 703
2010-12-02 05:27:10 C 01 01 37.27 +04 41 20.2 r 703
2010-12-08 02:33:03 C 00 28 40.72 +02 13 48.1 r 703
2010-12-08 02:39:34 C 00 28 39.18 +02 13 40.9 r 703
2010-12-08 02:46:09 C 00 28 37.38 +02 13 31.6 r 703
2010-12-08 02:52:43 C 00 28 35.86 +02 13 26.4 r 703
2012-11-05 06:48:06 c 00 30 18.928 -00 55 27.91 L F51
2012-11-05 07:09:54 c 00 30 17.447 -00 55 35.11 L F51
2012-11-05 07:31:37 c 00 30 15.983 -00 55 41.96 L F51
2013-06-13 10:05:51 C 21 46 40.98 -19 38 27.0 u 703
2013-06-13 10:15:41 C 21 46 39.07 -19 38 39.6 u 703
2013-06-13 10:25:32 C 21 46 37.05 -19 38 52.6 u 703
2013-06-13 10:35:29 C 21 46 35.04 -19 39 05.5 u 703
2013-06-16 09:54:04 C 21 32 25.47 -21 08 27.6 u 703
2013-06-16 10:01:50 C 21 32 23.89 -21 08 36.5 u 703
2013-06-16 10:09:42 C 21 32 22.27 -21 08 46.2 u 703
2013-07-04 10:49:50 C 20 10 29.054 -27 13 03.61 L F51
2013-07-04 11:07:56 C 20 10 25.922 -27 13 12.36 L F51
2013-07-04 11:26:03 C 20 10 22.790 -27 13 21.04 L F51
2013-07-19 10:18:35 C 19 21 58.950 -28 41 42.40 L F51
2013-07-19 10:34:25 C 19 21 57.261 -28 41 43.28 L F51
2013-07-19 10:48:42 C 19 21 55.742 -28 41 44.49 L F51
2023-10-11 07:56:47 C 03 34 08.555 +15 32 02.98 V G96
2023-10-11 08:04:12 C 03 34 08.350 +15 32 02.62 V G96
2023-10-11 08:11:35 C 03 34 08.220 +15 32 01.68 V G96
2023-10-11 08:19:00 C 03 34 08.029 +15 32 01.00 V G96
2023-10-13 10:27:16 C 03 33 05.199 +15 26 24.50 X F52
2023-10-13 10:45:47 C 03 33 04.707 +15 26 22.28 X F52
2023-10-13 11:04:20 C 03 33 04.208 +15 26 20.08 X F52
2023-10-13 11:23:01 C 03 33 03.705 +15 26 17.78 X F52
2023-10-17 10:25:35 C 03 30 17.204 +15 12 59.51 X F51
2023-10-17 10:44:08 C 03 30 16.493 +15 12 56.64 X F51
2023-10-17 11:02:42 C 03 30 15.784 +15 12 53.86 X F51
2023-10-17 11:21:30 C 03 30 15.063 +15 12 50.86 X F51
2023-10-22 13:01:58 C 03 25 00.534 +14 50 12.47 X F51
2023-10-22 13:18:32 C 03 24 59.633 +14 50 08.89 X F51
2023-10-22 13:35:08 C 03 24 58.716 +14 50 05.26 X F51
2023-10-22 13:51:46 C 03 24 57.794 +14 50 01.47 X F51
2023-11-03 09:28:11 C 03 03 49.367 +13 25 33.85 V 703
2023-11-03 09:50:05 C 03 03 46.980 +13 25 21.14 V 703
2023-11-03 12:19:49 C 03 03 32.006 +13 24 28.45 X F52
2023-11-03 12:51:37 C 03 03 28.661 +13 24 15.52 X F52
2023-11-03 13:07:23 C 03 03 27.011 +13 24 09.12 X F52
2023-11-05 08:29:56 C 02 58 53.584 +13 06 06.44 V G96
2023-11-05 08:30:38 C 02 58 53.508 +13 06 06.26 V G96
2023-11-05 08:37:22 C 02 58 52.748 +13 06 03.13 V G96
2023-11-05 08:38:04 C 02 58 52.666 +13 06 02.84 V G96