1999 HC1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5058338539
Semi-major axis (a)2.0433098837 AU
Inclination (i)1.27863288°
Long. of Asc. Node (Ω)28.46161904° ± 5.00e+00
Arg. of Perihelion (ω)159.17820762° ± 6.00e+00
Mean Anomaly (M)46.25831067°
Mean Motion (n)0.3374444000°/day
Perihelion dist (q)1.00973400 AU
Aphelion dist (Q)3.07688880 AU
Orbital Period2.92080010 yr
Physical Parameters
H (abs. magnitude)24.50
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-18
RMS Residual0.617″
Uncertainty
Orbit TypeAmor
MOID0.012780 AU
Observations Used11
Oppositions1
Arc Total1999-1999
First Observation Used
Last Observation Used1999-04-21
Observations (11)
Date Type RA Dec Mag Band Observatory
1999-04-16 07:27:40 C 12 09 23.61 +02 58 30.0 18.2 a 704
1999-04-16 07:42:59 C 12 09 49.57 +02 54 28.9 18.3 a 704
1999-04-16 07:58:22 C 12 10 15.65 +02 50 29.2 18.2 a 704
1999-04-16 08:14:00 C 12 10 42.10 +02 46 25.0 18.6 a 704
1999-04-20 07:37:29 C 14 27 37.44 -16 03 46.4 17.5 a 704
1999-04-20 08:00:43 C 14 27 59.00 -16 06 33.0 17.6 a 704
1999-04-20 08:24:06 C 14 28 20.73 -16 09 18.6 17.3 a 704
1999-04-20 08:47:30 C 14 28 42.50 -16 12 01.9 18.1 a 704
1999-04-21 00:19:15 C 14 43 27.00 -17 53 12.1 557
1999-04-21 00:20:43 C 14 43 28.11 -17 53 20.7 557
1999-04-21 00:22:12 C 14 43 29.37 -17 53 29.3 557