2021 RY4

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5003139000
Semi-major axis (a)1.9329326000 AU
Inclination (i)5.69296000°
Long. of Asc. Node (Ω)345.95761000°
Arg. of Perihelion (ω)329.37926000°
Mean Anomaly (M)211.64980000°
Mean Motion (n)0.3667575100°/day
Perihelion dist (q)0.96585960 AU
Aphelion dist (Q)2.90000560 AU
Orbital Period2.68735520 yr
Physical Parameters
H (abs. magnitude)28.46
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.740″
Uncertainty7
Orbit TypeApollo
MOID0.001753 AU
Observations Used26
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-10-01
Observations (26)
Date Type RA Dec Mag Band Observatory
2021-09-09 07:40:07 C 00 38 28.59 +11 58 05.3 V G96
2021-09-09 07:48:14 C 00 38 30.29 +12 01 12.5 V G96
2021-09-09 08:04:27 C 00 38 33.73 +12 07 24.7 V G96
2021-09-09 10:04:39 C 00 38 57.63 +12 50 54.8 V G96
2021-09-09 10:04:55 C 00 38 57.68 +12 50 59.9 V G96
2021-09-09 10:05:10 C 00 38 57.73 +12 51 05.4 V G96
2021-09-09 10:05:26 C 00 38 57.78 +12 51 10.5 V G96
2021-09-09 21:51:19 C 00 43 13.83 +16 07 42.0 V 033
2021-09-09 21:53:57 C 00 43 14.27 +16 08 17.8 V 033
2021-09-09 22:57:27 C 00 43 23.89 +16 22 59.0 V 033
2021-09-09 22:58:52 C 00 43 24.08 +16 23 18.0 V 033
2021-09-09 23:00:16 C 00 43 24.29 +16 23 36.9 V 033
2021-09-10 02:02:19 C 00 43 42.96 +17 02 38.0 o K88
2021-09-10 02:05:12 C 00 43 43.27 +17 03 12.8 o K88
2021-09-10 02:08:06 C 00 43 43.68 +17 03 47.1 o K88
2021-09-11 09:12:44 C 00 48 51.78 +21 21 03.4 o 291
2021-09-11 09:22:36 C 00 48 51.81 +21 21 57.7 o 291
2021-09-13 12:45:38 C 00 52 28.506 +24 25 28.03 V T12
2021-09-13 12:49:05 C 00 52 28.398 +24 25 35.46 V T12
2021-09-13 12:52:36 C 00 52 28.290 +24 25 42.92 V T12
2021-09-15 11:05:11 C 00 53 57.539 +25 42 33.45 V G37
2021-09-15 11:06:06 C 00 53 57.501 +25 42 34.63 V G37
2021-09-15 11:07:01 C 00 53 57.505 +25 42 35.60 V G37
2021-09-15 11:07:56 C 00 53 57.479 +25 42 36.32 V G37
2021-10-01 11:22:09 C 00 54 02.646 +27 11 04.33 V G37
2021-10-01 12:02:36 C 00 54 01.925 +27 10 53.80 V G37