20429 (1998 YN1)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4640786739 ± 1.59e-08
Semi-major axis (a)1.5559503243 AU ± 1.87e-09
Inclination (i)6.30191602° ± 2.25e-06
Long. of Asc. Node (Ω)61.72842223° ± 2.13e-05
Arg. of Perihelion (ω)147.70296024° ± 2.17e-05
Mean Anomaly (M)245.55338327° ± 1.12e-05
Mean Motion (n)0.5078303879°/day ± 9.16e-10
Perihelion dist (q)0.83386696 AU ± 2.48e-08
Aphelion dist (Q)2.27803369 AU ± 2.49e-08
Orbital Period1.94085724 yr ± 3.50e-09
Physical Parameters
H (abs. magnitude)17.76
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.339″
Uncertainty0
Orbit TypeApollo
MOID0.056985 AU
Observations Used706
Oppositions14
Arc Total1998-2026
First Observation Used1998-12-16
Last Observation Used2026-01-12
Observations (745)
Date Type RA Dec Mag Band Observatory
1998-12-19 09:10:39 C 05 56 51.66 +30 36 28.5 658
1998-12-19 09:16:04 C 05 56 51.11 +30 36 30.8 658
1998-12-20 13:48:59 C 05 53 59.53 +30 47 12.1 360
1998-12-20 13:55:30 C 05 53 58.83 +30 47 14.4 360
1998-12-20 14:00:29 C 05 53 58.30 +30 47 16.3 360
1998-12-21 13:41:24 C 05 51 31.57 +30 56 08.0 422
1998-12-21 13:42:14 C 05 51 31.51 +30 56 08.4 422
1998-12-21 13:43:32 C 05 51 31.36 +30 56 08.4 422
1998-12-24 11:21:33 C 05 44 04.68 +31 20 10.8 z 402
1998-12-24 11:23:51 C 05 44 04.36 +31 20 10.9 z 402
1998-12-26 13:44:30 C 05 38 27.20 +31 36 32.5 360
1998-12-26 13:50:00 C 05 38 26.55 +31 36 33.9 360
1998-12-26 13:58:15 C 05 38 25.60 +31 36 36.6 360
1998-12-28 19:42:21 C 05 32 17.29 +31 52 35.2 046
1998-12-28 19:44:48 C 05 32 16.98 +31 52 36.1 046
1998-12-28 19:46:30 C 05 32 16.77 +31 52 36.4 046
1999-01-05 12:14:36 C 05 10 43.38 +32 35 24.8 z 402
1999-01-05 12:16:36 C 05 10 43.12 +32 35 25.1 z 402
1999-01-05 12:18:36 C 05 10 42.91 +32 35 25.6 z 402
1999-01-05 22:34:08 C 05 09 30.95 +32 37 08.2 557
1999-01-05 22:45:39 C 05 09 29.59 +32 37 11.4 z 587
1999-01-05 22:51:55 C 05 09 28.81 +32 37 12.3 z 587
1999-01-06 12:01:34 C 05 07 57.98 +32 39 41.9 422
1999-01-06 12:03:44 C 05 07 57.66 +32 39 42.1 422
1999-01-13 21:31:16 C 04 48 28.66 +32 59 11.9 118
1999-01-13 21:40:27 C 04 48 27.65 +32 59 12.2 118
1999-01-15 20:52:43 C 04 43 44.36 +33 01 50.6 z 587
1999-01-15 20:59:43 C 04 43 43.79 +33 01 51.4 z 587
1999-01-15 21:10:26 C 04 43 42.72 +33 01 52.6 z 587
1999-01-16 22:51:40 C 04 41 14.38 +33 02 50.4 118
1999-01-16 23:00:24 C 04 41 13.49 +33 02 51.1 118
1999-01-18 13:10:54 C 04 37 42.73 +33 04 02.2 z 402
1999-01-18 13:13:14 C 04 37 42.49 +33 04 02.0 z 402
1999-01-18 13:17:51 C 04 37 42.09 +33 04 02.9 z 402
1999-01-20 20:53:19 C 04 32 54.83 +33 04 50.1 z 587
1999-01-20 21:10:05 C 04 32 53.39 +33 04 49.9 z 587
1999-01-21 12:59:15 C 04 31 36.05 +33 04 59.4 360
1999-01-21 13:02:45 C 04 31 35.76 +33 04 59.3 360
1999-01-21 13:06:29 C 04 31 35.44 +33 04 59.3 360
1999-01-21 19:13:26 C 04 31 06.58 +33 04 56.8 046
1999-01-21 19:16:12 C 04 31 06.36 +33 04 56.9 046
1999-01-21 19:18:47 C 04 31 06.14 +33 04 57.0 046
1999-01-21 23:23:29 C 04 30 45.83 +33 04 55.1 z 071
1999-01-21 23:27:15 C 04 30 45.52 +33 04 55.0 z 071
1999-01-21 23:30:59 C 04 30 45.22 +33 04 55.0 z 071
1999-01-21 23:34:46 C 04 30 44.94 +33 04 54.7 z 071
1999-01-21 23:38:30 C 04 30 44.50 +33 04 56.0 z 071
1999-01-24 05:37:27 C 04 26 42.10 +33 04 50.9 a 658
1999-01-24 05:40:41 C 04 26 41.83 +33 04 50.8 a 658
1999-02-20 02:40:35 C 04 09 26.40 +33 17 00.9 z 711