2021 WW4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5577319152
Semi-major axis (a)2.4049368238 AU
Inclination (i)2.31679128°
Long. of Asc. Node (Ω)91.26710887°
Arg. of Perihelion (ω)304.87264725° ± 6.00e+00
Mean Anomaly (M)30.38670714°
Mean Motion (n)0.2642338500°/day
Perihelion dist (q)1.06362270 AU
Aphelion dist (Q)3.74669470 AU
Orbital Period3.73005820 yr
Physical Parameters
H (abs. magnitude)24.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.284″
Uncertainty
Orbit TypeAmor
MOID0.076977 AU
Observations Used17
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-12-01
Observations (17)
Date Type RA Dec Mag Band Observatory
2021-11-26 06:39:09 C 02 18 19.253 +03 08 43.64 U F51
2021-11-26 06:57:45 C 02 18 24.137 +03 09 34.52 U F51
2021-11-26 07:16:25 C 02 18 29.034 +03 10 25.90 U F51
2021-11-27 03:46:25 C 02 24 07.52 +04 06 50.4 V 807
2021-11-27 03:52:56 C 02 24 09.21 +04 07 07.8 V 807
2021-11-27 03:59:10 C 02 24 10.79 +04 07 24.5 V 807
2021-11-27 06:56:31 C 02 25 02.140 +04 14 20.70 V F51
2021-11-27 07:17:37 C 02 25 07.519 +04 15 16.94 V F51
2021-11-28 02:10:07 C 02 30 12.33 +05 05 41.6 V 807
2021-11-28 02:18:05 C 02 30 14.31 +05 06 02.7 V 807
2021-11-28 02:34:02 C 02 30 18.36 +05 06 44.0 V 807
2021-12-01 03:08:58 C 02 48 48.58 +08 02 54.1 u H21
2021-12-01 03:12:06 C 02 48 49.27 +08 03 01.4 u H21
2021-12-01 03:25:45 C 02 48 53.79 +08 03 38.2 V V06
2021-12-01 03:27:14 C 02 48 54.09 +08 03 41.1 V V06
2021-12-01 03:28:43 C 02 48 54.48 +08 03 44.7 V V06
2021-12-01 03:30:12 C 02 48 54.80 +08 03 48.6 V V06