2021 HW1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5753395881 ± 4.81e-04
Semi-major axis (a)2.0196559599 AU ± 2.13e-03
Inclination (i)7.30665845° ± 5.36e-03
Long. of Asc. Node (Ω)193.74244457° ± 3.06e-03
Arg. of Perihelion (ω)75.75321267° ± 3.73e-03
Mean Anomaly (M)201.12471062° ± 8.81e-01
Mean Motion (n)0.3433967519°/day ± 5.44e-04
Perihelion dist (q)0.85766793 AU ± 1.33e-03
Aphelion dist (Q)3.18164399 AU ± 3.50e-03
Orbital Period2.87022599 yr ± 4.55e-03
Physical Parameters
H (abs. magnitude)25.07
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.376″
Uncertainty3
Orbit TypeApollo
MOID0.046419 AU
Observations Used60
Oppositions1
Arc Total2021-2021
First Observation Used2021-04-18
Last Observation Used2021-04-24
Observations (60)
Date Type RA Dec Mag Band Observatory
2021-04-23 07:50:57 C 15 28 45.87 +55 21 17.3 V I52
2021-04-23 07:54:46 C 15 28 52.95 +55 22 32.2 V I52
2021-04-23 20:04:55 C 15 55 25.37 +59 03 51.6 V 033
2021-04-23 20:08:38 C 15 55 34.30 +59 04 58.3 V 033
2021-04-23 20:09:23 C 15 55 36.08 +59 05 11.7 V 033
2021-04-23 20:10:08 C 15 55 37.86 +59 05 24.9 V 033
2021-04-24 21:35:09 C 17 11 10.80 +65 18 37.4 V 033
2021-04-24 21:35:54 C 17 11 13.45 +65 18 45.8 V 033
2021-04-24 21:36:39 C 17 11 16.18 +65 18 55.1 V 033
2021-04-24 21:37:24 C 17 11 18.76 +65 19 02.9 V 033