1998 US18

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6775273949 ± 1.14e-06
Semi-major axis (a)2.6033485947 AU ± 9.02e-08
Inclination (i)9.66104475° ± 6.12e-05
Long. of Asc. Node (Ω)207.10339891° ± 2.44e-05
Arg. of Perihelion (ω)115.53077213° ± 3.70e-04
Mean Anomaly (M)168.38009594° ± 5.73e-05
Mean Motion (n)0.2346463422°/day ± 1.22e-08
Perihelion dist (q)0.83950860 AU ± 2.98e-06
Aphelion dist (Q)4.36718859 AU ± 2.98e-06
Orbital Period4.20047581 yr ± 2.18e-07
Physical Parameters
H (abs. magnitude)20.90
G (slope)0.15
Alternative Designations

2019 VC1

Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.451″
Uncertainty0
Orbit TypeApollo
MOID0.031057 AU
Observations Used66
Oppositions16
Arc Total1998-2019
First Observation Used1998-10-25
Last Observation Used2019-11-05
Observations (68)
Date Type RA Dec Mag Band Observatory
1998-10-25 03:14:46 c 22 23 44.12 -07 05 29.6 i 691
1998-10-25 03:27:19 c 22 23 52.91 -07 05 26.7 i 691
1998-10-25 03:39:31 c 22 24 01.56 -07 05 23.7 i 691
1998-10-25 03:47:47 c 22 24 07.38 -07 05 21.8 i 691
1998-10-25 04:18:57 c 22 24 29.33 -07 05 13.5 i 691
1998-10-25 04:49:39 c 22 24 50.81 -07 05 05.6 i 691
1998-10-25 05:52:34 c 22 25 34.80 -07 04 47.9 i 691
1998-10-25 06:11:27 c 22 25 48.18 -07 04 42.3 i 691
1998-10-27 02:15:01 c 22 55 01.74 -06 49 54.4 i 691
1998-10-28 06:37:04 c 23 11 24.10 -06 37 50.2 i 691
1998-10-29 11:15:59 C 23 26 19.37 -06 24 33.1 360
1998-10-29 11:19:30 C 23 26 21.07 -06 24 31.8 360
1998-10-29 11:23:15 C 23 26 22.84 -06 24 30.4 360
1998-10-29 11:26:59 C 23 26 24.60 -06 24 28.4 360
1998-10-30 04:59:07 C 23 34 43.37 -06 16 07.6 658
1998-10-30 05:01:20 C 23 34 44.33 -06 16 06.2 658
1998-10-30 05:10:32 C 23 34 48.45 -06 16 01.6 658
1998-10-30 10:59:14 C 23 37 27.10 -06 12 05.9 b 426
1998-10-30 11:04:50 C 23 37 29.55 -06 12 04.7 b 426
1998-10-30 11:10:27 C 23 37 32.06 -06 12 02.3 b 426
1998-11-08 12:09:14 C 00 44 28.57 -04 28 16.2 360
1998-11-08 12:15:00 C 00 44 29.68 -04 28 14.0 360
1998-11-08 12:20:59 C 00 44 30.85 -04 28 11.3 360
2019-11-28 04:59:45 C 00 36 37.303 -05 04 32.40 U F51
2019-11-28 05:15:27 C 00 36 39.838 -05 04 21.27 U F51
2019-11-28 05:31:10 C 00 36 42.381 -05 04 09.84 U F51
2019-11-28 05:46:54 C 00 36 44.929 -05 03 58.49 U F51
2019-11-01 02:44:44 C 21 15 05.40 -13 31 20.4 V G96
2019-11-01 02:53:04 C 21 15 09.42 -13 31 16.9 V G96
2019-11-01 03:01:22 C 21 15 13.48 -13 31 13.7 V G96
2019-11-01 03:09:39 C 21 15 17.52 -13 31 10.5 V G96
2019-11-01 03:52:38 C 21 15 38.37 -13 30 52.2 V H01
2019-11-01 03:58:31 C 21 15 41.23 -13 30 49.6 V H01
2019-11-01 04:20:05 C 21 15 51.75 -13 30 40.2 V H01
2019-11-01 04:24:21 C 21 15 53.83 -13 30 38.3 V H01
2019-11-01 04:29:14 C 21 15 56.32 -13 30 35.9 V I52
2019-11-01 04:31:02 C 21 15 57.18 -13 30 35.6 V I52
2019-11-01 04:34:38 C 21 15 58.90 -13 30 33.7 V I52
2019-11-02 00:19:17 C 21 25 40.68 -13 21 36.1 u H21
2019-11-02 00:29:20 C 21 25 45.47 -13 21 31.1 u H21
2019-11-02 00:34:12 C 21 25 47.80 -13 21 29.0 u H21
2019-11-02 01:10:24 C 21 26 05.35 -13 21 10.9 V 734
2019-11-02 01:16:14 C 21 26 08.13 -13 21 08.1 V 734
2019-11-02 01:27:40 C 21 26 13.62 -13 21 02.2 V 734
2019-11-02 01:33:24 C 21 26 16.27 -13 20 59.4 V 734
2019-11-02 01:38:09 C 21 26 19.03 -13 20 54.9 V I52
2019-11-02 01:39:34 C 21 26 19.71 -13 20 54.1 V I52
2019-11-02 01:42:23 C 21 26 21.04 -13 20 52.9 V I52
2019-11-02 01:50:04 C 21 26 24.28 -13 20 50.9 q H36
2019-11-02 02:03:41 C 21 26 30.73 -13 20 44.9 q H36