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
1997-10-23 10:17:48 c 03 20 11.65 +14 24 38.7 i 691
1997-10-23 10:51:07 c 03 20 09.37 +14 24 30.2 i 691
1997-10-23 11:22:31 c 03 20 07.60 +14 24 21.8 i 691
1997-10-24 06:47:57 c 03 18 57.67 +14 19 24.6 i 691
1997-10-24 06:53:09 C 03 18 57.34 +14 19 19.3 658
1997-10-24 06:56:31 c 03 18 57.10 +14 19 22.1 i 691
1997-10-24 07:00:08 C 03 18 56.92 +14 19 17.5 658
1997-10-24 07:06:48 C 03 18 56.43 +14 19 15.6 658
1997-10-24 07:07:04 c 03 18 56.38 +14 19 19.5 i 691
1997-10-24 11:34:12 C 03 18 39.39 +14 18 12.6 c 608
1997-10-24 12:34:57 C 03 18 35.35 +14 17 56.5 c 608
1997-10-25 07:28:23 c 03 17 22.38 +14 12 46.5 i 691
1997-10-25 07:36:26 c 03 17 21.79 +14 12 44.6 i 691
1997-10-25 07:45:49 c 03 17 21.21 +14 12 41.2 i 691
1997-10-25 11:33:15 c 03 17 05.21 +14 11 38.3 i 691
1997-10-25 11:41:22 c 03 17 04.64 +14 11 36.0 i 691
1997-10-25 11:49:24 c 03 17 04.05 +14 11 33.1 i 691
1997-10-26 05:25:45 C 03 15 52.72 +14 06 32.5 19.7 a 784
1997-10-26 05:37:30 C 03 15 51.81 +14 06 29.0 19.9 a 784
1997-10-26 05:52:44 C 03 15 50.68 +14 06 24.3 19.8 a 784
1997-10-26 06:11:45 C 03 15 49.31 +14 06 18.6 18.8 a 784
1997-10-26 06:26:29 C 03 15 48.19 +14 06 14.5 19.5 a 784
1997-10-26 06:44:00 C 03 15 46.96 +14 06 09.9 19.6 a 784
1997-10-27 01:07:41 C 03 14 27.78 +14 00 42.6 z 104
1997-10-27 01:14:00 C 03 14 27.27 +14 00 41.4 z 104
1997-10-27 01:20:00 C 03 14 26.85 +14 00 39.2 z 104
1997-11-02 01:24:04 C 03 02 02.49 +13 10 05.3 046
1997-11-02 01:29:09 C 03 02 01.94 +13 10 02.8 046
1997-11-02 01:34:14 C 03 02 01.46 +13 10 00.5 046
1997-11-02 01:43:15 C 03 02 00.55 +13 09 56.6 046
1997-11-02 10:59:32 c 03 01 04.31 +13 06 13.9 i 691
1997-11-02 11:10:58 c 03 01 03.11 +13 06 09.2 i 691
1997-11-02 11:22:24 c 03 01 01.92 +13 06 04.2 i 691
1997-11-02 16:09:29 C 03 00 33.38 +13 04 06.3 360
1997-11-02 16:32:14 C 03 00 30.93 +13 03 57.2 360
1997-11-02 16:38:45 C 03 00 30.26 +13 03 54.0 360
1997-11-03 11:03:19 c 02 58 34.64 +12 56 06.3 i 691
1997-11-03 11:09:40 c 02 58 33.87 +12 56 03.5 i 691
1997-11-03 11:15:23 c 02 58 33.24 +12 56 01.2 i 691
1997-11-05 15:05:28 C 02 52 48.07 +12 32 36.6 z 381
1997-11-05 15:10:11 C 02 52 47.45 +12 32 33.7 z 381
1997-11-05 15:14:54 C 02 52 46.89 +12 32 31.5 z 381
1997-11-06 07:29:59 C 02 50 51.71 +12 24 43.4 19.3 b 704
1997-11-06 07:32:32 C 02 50 51.60 +12 24 41.4 19.8 b 704
1997-11-06 07:35:05 C 02 50 51.09 +12 24 41.3 19.3 b 704
1997-11-06 07:37:28 C 02 50 50.93 +12 24 41.5 19.8 b 704
1997-11-06 07:40:01 C 02 50 50.47 +12 24 38.3 19.7 b 704
1997-11-06 07:42:34 C 02 50 50.25 +12 24 37.1 19.9 b 704
1997-11-06 07:45:07 C 02 50 49.86 +12 24 37.0 19.6 b 704
1997-11-06 07:47:30 C 02 50 49.74 +12 24 37.2 19.8 b 704