IAA RAS IAA Minor Planet Database

2021 WK4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4543490000
Semi-major axis (a)1.6643746000 AU
Inclination (i)8.92311000°
Long. of Asc. Node (Ω)245.88491000°
Arg. of Perihelion (ω)226.26789000°
Mean Anomaly (M)290.41352000°
Mean Motion (n)0.4590156000°/day
Perihelion dist (q)0.90816770 AU
Aphelion dist (Q)2.42058150 AU
Orbital Period2.14722040 yr
Physical Parameters
H (abs. magnitude)27.71
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date—
RMS Residual0.540″
Uncertainty7
Orbit TypeApollo
MOID0.009688 AU
Observations Used18
Oppositions1
Arc Total—
First Observation Used—
Last Observation Used2021-12-01
Observations (20)
Date Type RA Dec Mag Band Observatory
2021-11-29 02:28:43 C 02 13 45.04 +11 55 17.5 – V G96
2021-11-29 02:36:53 C 02 13 46.25 +11 52 21.9 – V G96
2021-11-29 02:45:04 C 02 13 47.38 +11 49 24.1 – V G96
2021-11-29 02:53:16 C 02 13 48.56 +11 46 27.7 – V G96
2021-11-29 05:35:59 C 02 14 09.50 +10 45 03.5 – V I52
2021-11-29 05:37:18 C 02 14 09.67 +10 44 32.5 – V I52
2021-11-29 05:38:38 C 02 14 09.87 +10 44 01.4 – V I52
2021-11-30 06:22:27 C 02 21 28.62 -01 43 27.2 – V G96
2021-11-30 06:22:41 C 02 21 28.66 -01 43 36.3 – V G96
2021-11-30 06:22:55 C 02 21 28.75 -01 43 44.9 – V G96
2021-11-30 06:33:06 C 02 21 31.29 -01 50 18.2 – V G96
2021-11-30 06:33:32 C 02 21 31.37 -01 50 35.8 – V G96
2021-11-30 06:35:32 C 02 21 31.91 -01 51 52.3 – V G96
2021-11-30 06:40:54 C 02 21 33.26 -01 55 20.2 – V G96
2021-11-30 06:41:20 C 02 21 33.38 -01 55 37.5 – V G96
2021-11-30 06:41:46 C 02 21 33.45 -01 55 54.2 – V G96
2021-12-01 04:22:09 C 02 32 45.09 -19 23 28.9 – V I52
2021-12-01 04:22:45 C 02 32 45.39 -19 24 04.5 – V I52
2021-12-01 04:23:22 C 02 32 45.66 -19 24 39.8 – V I52
2021-12-01 04:23:59 C 02 32 45.97 -19 25 15.7 – V I52