2021 TW

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.4032034584 ± 2.00e+00
Semi-major axis (a)	1.7256965435 AU ± 3.00e+00
Inclination (i)	10.73390404° ± 4.00e+00
Long. of Asc. Node (Ω)	191.19058326° ± 5.00e+00
Arg. of Perihelion (ω)	220.40648883° ± 6.00e+00
Mean Anomaly (M)	279.93947837° ± 8.70e+00
Mean Motion (n)	0.4363211900°/day ± 1.14e+00
Perihelion dist (q)	1.02862300 AU ± 3.89e+00
Aphelion dist (Q)	2.41457380 AU ± 5.44e+00
Orbital Period	2.25890400 yr ± 5.89e+00

Physical Parameters

H (abs. magnitude)	26.18
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-04-18
RMS Residual	0.165″
Uncertainty	4
Orbit Type	Amor
MOID	0.078933 AU
Observations Used	16
Oppositions	1
Arc Total	2021-2021
First Observation Used	—
Last Observation Used	2021-10-04

Observations (16)

Date	Type	RA	Dec	Mag	Band	Observatory
2021-10-02 06:53:00	C	00 27 51.01	+07 29 21.9	–	V	V00
2021-10-02 07:00:48	C	00 27 52.37	+07 28 57.1	–	V	V00
2021-10-02 07:08:34	C	00 27 53.73	+07 28 31.7	–	V	V00
2021-10-02 07:16:21	C	00 27 55.07	+07 28 06.8	–	V	V00
2021-10-02 08:31:04	C	00 28 08.11	+07 24 05.3	–	o	291
2021-10-02 08:42:55	C	00 28 10.22	+07 23 26.7	–	o	291
2021-10-02 08:54:49	C	00 28 12.31	+07 22 48.2	–	o	291
2021-10-03 04:24:10	C	00 32 07.55	+06 19 09.9	–	V	807
2021-10-03 04:30:38	C	00 32 08.75	+06 18 47.6	–	V	807
2021-10-03 04:36:51	C	00 32 09.88	+06 18 26.4	–	V	807
2021-10-04 04:25:11	C	00 37 14.82	+04 52 17.3	–	V	V00
2021-10-04 04:26:28	C	00 37 15.06	+04 52 12.9	–	V	V00
2021-10-04 04:27:45	C	00 37 15.32	+04 52 08.3	–	V	V00
2021-10-04 09:08:24	C	00 38 15.117	+04 35 03.68	–	U	F51
2021-10-04 09:27:12	C	00 38 18.863	+04 33 53.22	–	U	F51
2021-10-04 09:46:04	C	00 38 22.582	+04 32 42.81	–	U	F51