2021 RH4

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.4279099987 ± 1.98e-04
Semi-major axis (a)	1.7755372073 AU ± 6.27e-04
Inclination (i)	4.02703142° ± 1.59e-03
Long. of Asc. Node (Ω)	145.35459016° ± 2.74e-04
Arg. of Perihelion (ω)	237.17094517° ± 6.74e-04
Mean Anomaly (M)	265.28367223° ± 3.31e-01
Mean Motion (n)	0.4165984116°/day ± 2.21e-04
Perihelion dist (q)	1.01576708 AU ± 5.02e-04
Aphelion dist (Q)	2.53530733 AU ± 9.62e-04
Orbital Period	2.36589064 yr ± 1.25e-03

Physical Parameters

H (abs. magnitude)	25.14
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-06-02
RMS Residual	0.127″
Uncertainty	3
Orbit Type	Apollo
MOID	0.052544 AU
Observations Used	17
Oppositions	1
Arc Total	2021-2021
First Observation Used	2021-08-09
Last Observation Used	2021-09-11

Observations (17)

Date	Type	RA	Dec	Mag	Band	Observatory
2021-08-09 09:00:39	C	21 47 31.537	-10 11 23.98	–	V	F51
2021-08-09 09:17:28	C	21 47 32.093	-10 11 31.34	–	V	F51
2021-08-09 09:34:57	C	21 47 32.662	-10 11 39.23	–	V	F51
2021-08-09 13:17:20	C	21 47 39.963	-10 13 17.88	–	V	F51
2021-09-04 10:07:42	C	22 54 26.282	-21 38 07.23	–	V	F51
2021-09-04 10:30:35	C	22 54 31.282	-21 38 54.99	–	V	F51
2021-09-04 10:52:26	C	22 54 36.053	-21 39 40.27	–	V	F51
2021-09-08 11:43:08	C	23 23 16.783	-25 20 02.72	–	U	F51
2021-09-08 11:59:57	C	23 23 22.152	-25 20 42.75	–	U	F51
2021-09-08 12:33:43	C	23 23 33.030	-25 22 02.78	–	U	F51
2021-09-08 14:19:06	C	23 24 07.809	-25 26 07.51	–	V	F51
2021-09-08 14:20:04	C	23 24 08.131	-25 26 09.76	–	V	F51
2021-09-09 09:10:16	C	23 31 15.038	-26 13 12.22	–	V	F51
2021-09-09 09:23:05	C	23 31 19.507	-26 13 45.28	–	V	F51
2021-09-11 09:38:21	C	23 51 32.776	-28 16 43.06	–	U	F51
2021-09-11 10:08:35	C	23 51 45.504	-28 18 02.79	–	U	F51
2021-09-11 10:23:41	C	23 51 51.840	-28 18 42.13	–	U	F51