18882 (1999 YN4)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2321218724 ± 9.10e-09
Semi-major axis (a)1.6850068777 AU ± 1.15e-09
Inclination (i)36.81465272° ± 5.29e-07
Long. of Asc. Node (Ω)291.66685521° ± 7.61e-07
Arg. of Perihelion (ω)242.66795075° ± 2.19e-06
Mean Anomaly (M)230.13214226° ± 2.27e-06
Mean Motion (n)0.4506192696°/day ± 4.60e-10
Perihelion dist (q)1.29387993 AU ± 1.54e-08
Aphelion dist (Q)2.07613383 AU ± 1.54e-08
Orbital Period2.18727061 yr ± 2.23e-09
Physical Parameters
H (abs. magnitude)16.14
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.067″
Uncertainty0
Orbit TypeAmor
MOID0.430698 AU
Observations Used2638
Gaia Obs Used122
Oppositions34
Arc Total1954-2025
First Observation Used1954-01-04
Last Observation Used2025-12-18
Observations (4085)
Date Type RA Dec Mag Band Observatory
2018-06-17 14:03:06 C 21 11 51.204 -20 50 19.65 U F51
2018-06-17 14:17:22 C 21 11 50.271 -20 50 07.44 U F51
2018-06-18 08:40:17 C 21 10 40.67 -20 34 21.2 U 703
2018-06-18 08:48:02 C 21 10 40.17 -20 34 14.7 U 703
2018-06-18 08:55:46 C 21 10 39.62 -20 34 07.8 U 703
2018-06-18 09:03:32 C 21 10 39.13 -20 34 01.0 U 703
2018-06-19 13:28:50 C 21 08 46.634 -20 09 23.19 U F51
2018-06-19 13:43:45 C 21 08 45.584 -20 09 10.12 U F51
2018-06-21 09:04:14 C 21 05 45.35 -19 31 11.1 U 703
2018-06-21 09:11:36 C 21 05 44.80 -19 31 04.7 U 703
2018-06-21 09:18:58 C 21 05 44.25 -19 30 58.2 U 703
2018-06-21 09:26:20 C 21 05 43.69 -19 30 51.5 U 703
2018-06-22 12:32:48 C 21 03 45.21 -19 06 47.2 U T08
2018-06-22 12:51:21 C 21 03 43.80 -19 06 30.1 U T08
2018-06-22 12:52:41 C 21 03 43.70 -19 06 29.6 U T08
2018-06-22 13:05:57 C 21 03 42.65 -19 06 18.0 U T08
2018-06-24 12:38:19 C 21 00 04.89 -18 23 35.6 U T05
2018-06-24 12:59:41 C 21 00 03.15 -18 23 16.4 U T05
2018-06-24 13:03:54 C 21 00 02.81 -18 23 12.6 U T05
2018-06-24 13:07:13 C 21 00 02.50 -18 23 09.5 U T05
2018-06-24 13:23:57 C 21 00 01.17 -18 22 54.0 U T05
2018-06-24 13:24:36 C 21 00 01.13 -18 22 53.9 U T05
2018-06-24 13:40:18 C 20 59 59.84 -18 22 39.5 U T05
2018-06-26 11:16:14 C 20 56 19.61 -17 41 07.0 U T08
2018-06-26 11:27:40 C 20 56 18.66 -17 40 56.6 U T08
2018-06-26 11:35:00 C 20 56 18.06 -17 40 49.9 U T08
2018-06-26 11:36:20 C 20 56 17.83 -17 40 48.9 U T08
2018-06-26 11:52:16 C 20 56 16.56 -17 40 34.9 U T08
2018-06-27 12:13:54 C 20 54 14.12 -17 18 09.9 U T08
2018-06-27 12:23:46 C 20 54 13.31 -17 18 00.9 U T08
2018-06-27 12:37:16 C 20 54 12.14 -17 17 48.8 U T08
2018-06-27 12:50:30 C 20 54 10.90 -17 17 35.6 U T08
2018-07-05 08:02:35 C 20 37 03.38 -14 21 45.0 U 703
2018-07-05 08:10:34 C 20 37 02.51 -14 21 37.9 U 703
2018-07-05 08:18:33 C 20 37 01.71 -14 21 30.2 U 703
2018-07-05 08:26:32 C 20 37 00.88 -14 21 22.8 U 703
2018-07-07 13:03:32 C 20 31 49.37 -13 31 18.9 U T05
2018-07-07 13:06:29 C 20 31 49.05 -13 31 16.2 U T05
2018-07-07 13:18:51 C 20 31 47.80 -13 31 04.2 U T05
2018-07-07 13:20:10 C 20 31 47.68 -13 31 03.3 U T05
2018-07-07 13:21:37 C 20 31 47.49 -13 31 01.1 U T05
2018-07-07 13:48:57 C 20 31 44.70 -13 30 35.9 U T05
2018-07-07 13:51:36 C 20 31 44.44 -13 30 32.5 U T05
2018-07-11 13:17:59 C 20 22 04.43 -12 00 07.8 U T05
2018-07-11 13:33:29 C 20 22 02.78 -11 59 53.2 U T05
2018-07-11 13:48:59 C 20 22 01.18 -11 59 38.5 U T05
2018-07-11 14:04:31 C 20 21 59.55 -11 59 23.6 U T05
2018-07-11 15:37:58 C 20 21 50.63 -11 57 57.5 q D29
2018-07-11 15:39:44 C 20 21 50.45 -11 57 55.9 q D29
2018-07-11 16:06:20 C 20 21 47.66 -11 57 30.9 q D29