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
2023-12-09 03:43:21 C 00 25 43.986 +02 08 52.94 V 703
2023-12-09 03:46:15 C 00 25 43.277 +02 08 49.24 V 703
2023-12-09 03:49:10 C 00 25 42.524 +02 08 45.35 V 703
2023-12-09 03:52:04 C 00 25 41.761 +02 08 43.26 V 703
2023-12-10 06:32:00 C 00 19 07.963 +01 39 29.34 V T05
2023-12-10 06:36:43 C 00 19 06.768 +01 39 23.26 V T05
2023-12-10 06:44:52 C 00 19 04.673 +01 39 14.80 V T05
2023-12-10 06:59:27 C 00 19 00.902 +01 38 58.09 V T05
2023-12-11 04:31:52 C 00 13 40.681 +01 15 05.36 V 703
2023-12-11 04:35:07 C 00 13 39.832 +01 15 02.05 V 703
2023-12-11 04:41:38 C 00 13 38.280 +01 14 51.68 V 703
2023-12-12 06:45:54 C 00 07 08.698 +00 46 09.37 V T08
2023-12-12 06:50:45 C 00 07 07.510 +00 46 05.12 V T08
2023-12-12 06:59:52 C 00 07 05.110 +00 45 54.47 V T08
2023-12-12 07:21:20 C 00 06 59.558 +00 45 30.17 V T08
2023-12-17 17:33:27 B 23 33 57.70 -01 40 01.2 W 130
2023-12-17 17:56:14 B 23 33 51.67 -01 40 26.8 W 130
2025-10-15 04:22:36 C 01 08 05.56 +02 31 30.3 V H21
2025-10-15 04:26:42 C 01 08 05.24 +02 31 28.9 V H21
2025-10-15 17:33:15 C 01 07 05.666 +02 25 41.21 W O18
2025-10-15 17:46:31 C 01 07 04.651 +02 25 35.67 W O18
2025-10-15 18:33:11 C 01 07 01.026 +02 25 15.08 W O18
2025-10-16 17:26:07 C 01 05 16.877 +02 15 08.81 W O18
2025-10-16 18:25:51 C 01 05 12.233 +02 14 42.48 W O18
2025-10-17 16:52:24 C 01 03 29.626 +02 04 47.93 W O18
2025-10-17 17:52:26 C 01 03 24.931 +02 04 21.63 W O18
2025-10-18 15:54:06 C 01 01 43.886 +01 54 39.04 W O18
2025-10-18 16:40:31 C 01 01 40.252 +01 54 18.60 W O18
2025-10-18 16:53:40 C 01 01 39.212 +01 54 12.92 W O18
2025-10-18 17:40:14 C 01 01 35.556 +01 53 52.35 W O18
2025-10-20 15:40:16 C 00 58 03.657 +01 33 42.43 W O18
2025-10-20 16:26:37 C 00 58 00.011 +01 33 22.34 W O18