503861 (1998 WZ1)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5567157211 ± 2.42e-08
Semi-major axis (a)2.1635271160 AU ± 2.31e-09
Inclination (i)4.31270015° ± 3.42e-06
Long. of Asc. Node (Ω)344.81457364° ± 7.22e-05
Arg. of Perihelion (ω)137.40719702° ± 7.27e-05
Mean Anomaly (M)159.57664957° ± 5.49e-06
Mean Motion (n)0.3097196517°/day ± 4.95e-10
Perihelion dist (q)0.95905756 AU ± 5.23e-08
Aphelion dist (Q)3.36799667 AU ± 5.24e-08
Orbital Period3.18231755 yr ± 5.09e-09
Physical Parameters
H (abs. magnitude)19.97
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.368″
Uncertainty0
Orbit TypeApollo
MOID0.022252 AU
Observations Used113
Oppositions14
Arc Total1998-2018
First Observation Used1998-11-17
Last Observation Used2018-05-16
Observations (124)
Date Type RA Dec Mag Band Observatory
2018-01-27 03:36:01 C 01 16 14.19 +17 49 31.8 U G96
2018-01-27 03:44:17 C 01 16 15.26 +17 49 36.9 U G96
2018-01-27 03:52:36 C 01 16 16.23 +17 49 42.9 U G96
2018-01-27 03:58:44 C 01 16 16.99 +17 49 46.3 U G96
2018-03-03 22:04:01 C 04 18 38.95 +26 18 59.1 U 204
2018-03-03 22:25:53 C 04 18 46.45 +26 19 00.5 U 204
2018-04-01 02:21:26 C 08 29 28.75 +14 45 48.2 U W34
2018-04-01 02:33:47 C 08 29 32.30 +14 45 28.4 U W34
2018-04-01 02:58:31 C 08 29 39.52 +14 44 46.6 U W34
2018-04-11 04:06:14 C 09 30 08.34 +08 39 22.0 U 703
2018-04-11 04:25:09 C 09 30 12.32 +08 38 56.7 U 703
2018-04-11 04:33:23 C 09 30 13.99 +08 38 45.3 U 703
2018-04-12 03:26:53 C 09 35 01.06 +08 08 18.1 U G96
2018-04-12 03:34:23 C 09 35 02.58 +08 08 08.8 U G96
2018-04-12 03:41:49 C 09 35 04.03 +08 07 58.4 U G96
2018-04-12 03:49:17 C 09 35 05.55 +08 07 48.2 U G96
2018-04-21 04:10:50 C 10 14 02.41 +03 56 51.5 U G96
2018-04-21 04:18:58 C 10 14 03.66 +03 56 43.4 U G96
2018-04-21 04:27:04 C 10 14 04.89 +03 56 35.0 U G96
2018-04-21 04:35:11 C 10 14 06.13 +03 56 26.8 U G96
2018-05-16 04:07:38 C 11 27 06.06 -03 35 39.1 U G96
2018-05-16 04:15:04 C 11 27 06.74 -03 35 44.3 U G96
2018-05-16 04:22:32 C 11 27 07.43 -03 35 48.2 U G96
2018-05-16 04:29:59 C 11 27 08.18 -03 35 52.0 U G96