2025 SY21

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.7139626479 ± 4.53e-04
Semi-major axis (a)2.0616494085 AU ± 2.72e-03
Inclination (i)1.35765213° ± 6.46e-04
Long. of Asc. Node (Ω)215.10691123° ± 1.19e-02
Arg. of Perihelion (ω)242.39006405° ± 1.15e-02
Mean Anomaly (M)1.17933450° ± 2.58e-03
Mean Motion (n)0.3329584610°/day ± 6.60e-04
Perihelion dist (q)0.58970874 AU ± 1.22e-03
Aphelion dist (Q)3.53359008 AU ± 4.76e-03
Orbital Period2.96020795 yr ± 5.87e-03
Physical Parameters
H (abs. magnitude)26.93
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-03
RMS Residual0.574″
Uncertainty1
Orbit TypeApollo
MOID0.010768 AU
Observations Used24
Oppositions1
Arc Total2025-2025
First Observation Used2025-09-29
Last Observation Used2025-09-30
Observations (24)
Date Type RA Dec Mag Band Observatory
2025-09-29 11:30:34 C 23 19 59.365 +20 52 45.40 X F51
2025-09-29 12:07:50 C 23 19 14.430 +21 01 37.75 X F51
2025-09-29 12:26:25 C 23 18 51.858 +21 06 05.13 X F51
2025-09-29 22:25:33 C 23 05 14.066 +23 55 40.44 W J95
2025-09-29 22:28:49 C 23 05 08.362 +23 56 45.71 W J95
2025-09-29 22:32:00 C 23 05 02.880 +23 57 48.74 W J95
2025-09-29 22:35:09 C 23 04 57.307 +23 58 52.36 W J95
2025-09-29 23:13:26 B 23 03 48.56 +24 12 24.7 V I93
2025-09-29 23:20:21 B 23 03 36.04 +24 14 45.4 V I93
2025-09-29 23:27:16 B 23 03 23.46 +24 17 07.0 V I93
2025-09-30 01:02:12 B 23 00 23.345 +24 49 54.12 W 204
2025-09-30 01:12:45 B 23 00 03.026 +24 53 39.37 W 204
2025-09-30 01:23:19 B 22 59 42.593 +24 57 25.81 W 204
2025-09-30 06:10:56 C 22 50 11.202 +26 54 18.08 V T12
2025-09-30 06:12:13 C 22 50 08.112 +26 54 51.38 V T12
2025-09-30 09:05:13 C 22 42 17.665 +28 10 26.15 V I52
2025-09-30 09:05:46 C 22 42 16.240 +28 10 40.76 V I52
2025-09-30 09:06:18 C 22 42 14.724 +28 10 55.09 V I52
2025-09-30 09:06:50 C 22 42 13.187 +28 11 10.00 V I52
2025-09-30 19:32:15 B 22 05 45.79 +33 59 46.0 X K19
2025-09-30 19:33:13 C 22 05 42.854 +33 59 06.25 W J95
2025-09-30 19:34:05 B 22 05 37.09 +34 00 58.1 X K19
2025-09-30 19:44:32 C 22 04 48.348 +34 06 32.47 W J95
2025-09-30 19:56:48 C 22 03 48.610 +34 14 37.39 W J95