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
2016-08-16 23:39:58 C 20 59 45.42 +27 44 55.5 q Z52
2016-08-26 20:56:38 C 20 41 14.86 +28 06 11.0 q 160
2016-08-26 20:56:55 C 20 41 14.86 +28 06 11.0 q 160
2016-08-26 20:59:36 C 20 41 14.63 +28 06 10.2 q 160
2016-08-26 20:59:53 C 20 41 14.63 +28 06 10.2 q 160
2016-08-26 21:02:36 C 20 41 14.42 +28 06 09.8 q 160
2016-08-26 21:02:53 C 20 41 14.42 +28 06 09.8 q 160
2016-08-28 20:44:00 C 20 37 53.37 +28 04 08.6 q 160
2016-08-28 20:46:12 C 20 37 53.21 +28 04 08.6 q 160
2016-08-28 20:48:27 C 20 37 53.03 +28 04 08.7 q 160
2016-10-31 18:29:47 C 20 22 50.68 +21 16 58.7 t 240
2016-10-31 18:32:27 C 20 22 50.77 +21 16 58.2 t 240
2016-10-31 18:36:42 C 20 22 50.92 +21 16 57.9 t 240
2018-05-01 15:55:37 S 21 21 36.312 -34 39 44.35 L C51
2018-05-01 19:03:57 S 21 21 43.807 -34 37 36.91 L C51
2018-05-19 14:19:53 C 21 31 01.03 -29 44 56.6 U T05
2018-05-19 14:21:13 C 21 31 01.03 -29 44 56.5 U T05
2018-05-19 14:31:05 C 21 31 01.02 -29 44 48.7 U T05
2018-05-19 14:41:04 C 21 31 01.10 -29 44 41.9 U T05
2018-05-21 14:03:12 C 21 31 09.23 -29 11 13.9 U T08
2018-05-21 14:14:25 C 21 31 09.26 -29 11 05.5 U T08
2018-05-21 14:25:45 C 21 31 09.21 -29 10 58.3 U T08
2018-05-21 14:37:01 C 21 31 09.22 -29 10 49.8 U T08
2018-06-06 13:13:05 C 21 24 46.96 -24 26 53.4 U T08
2018-06-06 13:17:44 C 21 24 46.79 -24 26 50.6 U T08
2018-06-06 13:24:25 C 21 24 46.50 -24 26 44.4 U T08
2018-06-06 13:29:04 C 21 24 46.34 -24 26 40.4 U T08
2018-06-06 13:35:42 C 21 24 46.10 -24 26 35.4 U T08
2018-06-06 13:40:22 C 21 24 45.95 -24 26 31.4 U T08
2018-06-06 13:51:42 C 21 24 45.52 -24 26 23.8 U T08
2018-06-10 13:03:37 C 21 20 56.73 -23 10 46.5 U T08
2018-06-10 13:14:55 C 21 20 56.16 -23 10 37.2 U T08
2018-06-10 13:26:14 C 21 20 55.65 -23 10 28.3 U T08
2018-06-10 13:37:31 C 21 20 55.14 -23 10 18.9 U T08
2018-06-12 13:06:29 C 21 18 39.79 -22 31 40.6 U T05
2018-06-12 13:12:26 C 21 18 39.49 -22 31 35.8 U T05
2018-06-12 13:17:44 C 21 18 39.18 -22 31 31.7 U T05
2018-06-12 13:23:41 C 21 18 38.91 -22 31 27.2 U T05
2018-06-12 13:29:00 C 21 18 38.64 -22 31 22.4 U T05
2018-06-12 13:34:57 C 21 18 38.29 -22 31 17.6 U T05
2018-06-13 18:30:14 C 21 17 08.90 -22 07 27.7 q D29
2018-06-13 18:50:36 C 21 17 07.75 -22 07 10.6 q D29
2018-06-13 19:10:57 C 21 17 06.58 -22 06 54.3 q D29
2018-06-15 13:23:33 C 21 14 46.545 -21 31 37.62 U F51
2018-06-15 13:54:01 C 21 14 44.707 -21 31 12.02 U F51
2018-06-16 12:47:19 C 21 13 24.20 -21 11 51.6 U T05
2018-06-16 12:57:51 C 21 13 23.56 -21 11 42.3 U T05
2018-06-16 13:09:08 C 21 13 22.83 -21 11 32.9 U T05
2018-06-17 13:34:37 C 21 11 53.062 -20 50 44.04 U F51
2018-06-17 13:48:51 C 21 11 52.132 -20 50 31.88 U F51