2021 AB5

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.3465258549 ± 3.22e-04
Semi-major axis (a)	1.0943753914 AU ± 1.70e-04
Inclination (i)	16.31658997° ± 1.72e-02
Long. of Asc. Node (Ω)	91.65163981° ± 1.24e-02
Arg. of Perihelion (ω)	255.38544594° ± 1.65e-02
Mean Anomaly (M)	181.28921562° ± 3.93e-01
Mean Motion (n)	0.8609200020°/day ± 2.00e-04
Perihelion dist (q)	0.71514602 AU ± 3.70e-04
Aphelion dist (Q)	1.47360476 AU ± 4.21e-04
Orbital Period	1.14485235 yr ± 2.66e-04

Physical Parameters

H (abs. magnitude)	23.09
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-06-02
RMS Residual	0.297″
Uncertainty	3
Orbit Type	Apollo
MOID	0.042018 AU
Observations Used	16
Oppositions	1
Arc Total	2021-2021
First Observation Used	2021-01-08
Last Observation Used	2021-01-16

Observations (16)

Date	Type	RA	Dec	Mag	Band	Observatory
2021-01-08 12:51:19	C	10 02 21.506	+41 43 11.75	–	U	F51
2021-01-08 13:23:18	C	10 02 16.852	+41 44 27.68	–	U	F51
2021-01-08 13:39:17	C	10 02 14.527	+41 45 06.14	–	U	F51
2021-01-09 08:28:51	C	09 59 41.22	+42 29 24.6	–	V	V06
2021-01-09 08:36:31	C	09 59 40.02	+42 29 43.1	–	V	V06
2021-01-09 08:40:22	C	09 59 39.49	+42 29 52.3	–	V	V06
2021-01-10 09:22:13	C	09 56 08.78	+43 26 32.2	–	V	V06
2021-01-10 09:26:48	C	09 56 08.09	+43 26 43.6	–	V	V06
2021-01-12 06:30:31	C	09 49 25.26	+45 04 51.8	–	V	V06
2021-01-12 06:44:12	C	09 49 23.02	+45 05 21.6	–	V	V06
2021-01-12 06:46:13	C	09 49 21.86	+45 05 26.1	–	u	H21
2021-01-12 06:51:03	C	09 49 21.91	+45 05 35.5	–	V	V06
2021-01-12 07:03:01	C	09 49 19.10	+45 06 02.2	–	u	H21
2021-01-16 09:49:14	C	09 33 10.22	+48 15 38.4	–	V	V06
2021-01-16 09:54:57	C	09 33 09.14	+48 15 48.2	–	V	V06
2021-01-16 10:00:39	C	09 33 08.15	+48 15 58.0	–	V	V06