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
1997-11-06 07:50:03 C 02 50 49.23 +12 24 32.6 19.6 b 704
1997-11-06 07:52:36 C 02 50 48.91 +12 24 32.9 19.8 b 704
1997-11-07 16:13:15 C 02 46 49.63 +12 08 16.1 360
1997-11-07 16:20:15 C 02 46 48.71 +12 08 12.5 360
1997-11-07 16:27:14 C 02 46 47.75 +12 08 09.4 360
1997-11-09 07:25:53 C 02 41 42.59 +11 47 17.3 a 696
1997-11-09 07:26:49 C 02 41 42.47 +11 47 16.6 a 696
1997-11-09 07:27:44 C 02 41 42.33 +11 47 16.2 a 696
1997-11-09 08:25:16 C 02 41 34.54 +11 46 39.3 658
1997-11-09 08:30:21 C 02 41 33.90 +11 46 36.2 658
1997-11-09 08:47:02 C 02 41 31.54 +11 46 26.8 658
1997-11-18 21:17:46 C 02 05 14.85 +09 13 58.4 z 587
1997-11-18 21:22:00 C 02 05 14.03 +09 13 54.9 z 587
1997-11-20 07:42:47 c 01 58 51.25 +08 46 33.3 i 691
1997-11-20 07:59:26 c 01 58 48.05 +08 46 19.6 i 691
1997-11-20 08:10:33 c 01 58 45.81 +08 46 10.2 i 691
1997-11-21 22:38:03 C 01 51 22.81 +08 14 00.2 046
1997-11-21 22:39:44 C 01 51 22.58 +08 13 58.7 046
1997-11-21 22:41:28 C 01 51 22.24 +08 13 56.6 046
1997-11-21 22:43:52 C 01 51 21.72 +08 13 54.2 046
1997-11-23 12:35:00 C 01 43 50.93 +07 41 07.2 360
1997-11-23 12:41:44 C 01 43 49.52 +07 41 00.1 360
1997-11-23 12:52:44 C 01 43 47.21 +07 40 50.6 360
1997-11-24 07:33:47 c 01 39 58.28 +07 24 08.0 i 691
1997-11-24 07:42:33 c 01 39 56.31 +07 23 59.9 i 691
1997-11-24 07:50:26 c 01 39 54.65 +07 23 52.8 i 691
1997-12-02 02:34:26 C 00 59 22.86 +04 23 03.2 658
1997-12-02 02:43:16 C 00 59 20.85 +04 22 55.6 658
1997-12-05 04:31:04 C 00 42 21.87 +03 06 45.8 658
1997-12-05 04:34:39 C 00 42 21.00 +03 06 41.7 658
1997-12-05 04:47:23 C 00 42 18.02 +03 06 28.7 658
1997-12-28 02:15:36 c 22 24 33.53 -06 45 18.2 i 691
1997-12-28 02:21:51 c 22 24 31.72 -06 45 25.0 i 691
1997-12-28 02:28:13 c 22 24 29.79 -06 45 31.8 i 691
2000-06-09 10:24:23 C 22 03 06.48 -17 46 19.1 b 691
2000-06-09 10:31:14 C 22 03 04.88 -17 46 28.6 b 691
2000-06-09 10:37:56 C 22 03 03.44 -17 46 39.9 b 691
2000-06-12 18:01:31 C 21 46 36.314 -19 38 55.72 413
2000-06-12 18:04:26 C 21 46 35.691 -19 38 59.57 413
2000-06-12 18:07:24 C 21 46 35.054 -19 39 03.78 413
2000-06-25 09:29:28 C 20 44 16.52 -25 14 42.2 b 691
2000-06-25 09:35:28 C 20 44 15.29 -25 14 47.2 b 691
2000-06-25 09:41:35 C 20 44 14.04 -25 14 52.2 b 691
2008-09-28 10:19:56 C 07 23 30.48 +21 21 22.8 o 291
2008-09-28 10:25:51 C 07 23 31.85 +21 21 18.7 o 291
2008-09-28 10:31:41 C 07 23 33.11 +21 21 16.7 o 291
2008-09-29 11:11:45 C 07 29 00.67 +21 12 39.6 o 291
2008-09-29 11:17:27 C 07 29 01.86 +21 12 39.6 o 291
2008-09-29 11:23:19 C 07 29 03.14 +21 12 36.0 o 291
2008-10-06 12:02:03 C 08 09 04.16 +19 49 04.8 o 691