2010 HW81

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS

Orbital Elements

Epoch (TDB)	2025-11-21 (JD 2461000.5)
Eccentricity (e)	0.7478816228 ± 2.00e+00
Semi-major axis (a)	1.2664755993 AU ± 3.00e+00
Inclination (i)	13.46957614° ± 4.00e+00
Long. of Asc. Node (Ω)	228.45261358° ± 5.00e+00
Arg. of Perihelion (ω)	95.49967391° ± 6.00e+00
Mean Anomaly (M)	316.77155411° ± 1.50e+00
Mean Motion (n)	0.6959278500°/day ± 2.47e+00
Perihelion dist (q)	0.30971450 AU ± 2.64e+00
Aphelion dist (Q)	2.21254570 AU ± 5.82e+00
Orbital Period	1.41624970 yr ± 5.03e+00

Physical Parameters

H (abs. magnitude)	20.26
G (slope)	0.15

Orbit Solution

Source	IAA
Solution Date	2026-04-18
RMS Residual	0.703″
Uncertainty	4
Orbit Type	Apollo
MOID	0.116262 AU
Observations Used	6
Oppositions	3
Arc Total	2010-2025
First Observation Used	—
Last Observation Used	2025-01-03

Observations (15)

Date	Type	RA	Dec	Mag	Band	Observatory
2010-04-25 13:25:33	S	08 28 52.53	-00 47 08.7	–	L	C51
2010-04-25 16:36:05	S	08 28 35.09	-00 42 23.4	–	L	C51
2010-04-25 19:46:36	S	08 28 17.63	-00 37 37.3	–	L	C51
2010-04-25 21:21:57	S	08 28 08.96	-00 35 13.0	–	L	C51
2010-04-25 22:57:07	S	08 28 00.31	-00 32 51.0	–	L	C51
2010-04-26 00:32:28	S	08 27 51.57	-00 30 28.6	–	L	C51
2010-04-26 03:42:59	S	08 27 34.40	-00 25 43.6	–	L	C51
2010-05-05 04:19:49	C	08 09 27.93	+04 49 52.8	–	o	291
2010-05-05 04:25:13	C	08 09 27.37	+04 50 02.7	–	o	291
2010-05-05 04:30:38	C	08 09 26.92	+04 50 09.0	–	o	291
2021-12-11 02:45:23	S	10 18 37.970	-29 40 44.22	–	L	C51
2021-12-11 07:27:46	S	10 16 25.178	-29 40 15.92	–	L	C51
2025-01-03 05:28:42	C	09 11 33.280	-09 02 11.50	–	V	807
2025-01-03 05:53:13	C	09 11 31.010	-09 02 11.80	–	V	807
2025-01-03 06:17:12	C	09 11 28.770	-09 02 11.60	–	V	807