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
2014-07-17 08:48:59 C 23 25 06.95 +37 25 23.8 u H21
2014-07-17 08:54:31 C 23 25 06.88 +37 25 29.5 u H21
2014-07-17 08:59:43 C 23 25 06.80 +37 25 34.5 u H21
2014-08-14 06:34:50 C 22 59 12.91 +47 42 48.6 u H21
2014-08-14 06:42:58 C 22 59 12.37 +47 42 54.8 u H21
2014-08-14 06:50:53 C 22 59 11.79 +47 43 00.5 u H21
2014-08-14 06:58:43 C 22 59 11.26 +47 43 06.0 u H21
2014-08-14 07:05:31 C 22 59 10.76 +47 43 11.1 u H21
2014-08-14 07:11:38 C 22 59 10.34 +47 43 15.2 u H21
2016-06-05 10:15:38 C 22 19 59.42 +03 36 25.1 q 703
2016-06-05 10:23:36 C 22 19 59.44 +03 36 32.9 q 703
2016-06-05 10:39:32 C 22 19 59.56 +03 36 49.4 q 703
2016-06-17 07:55:50 C 22 20 34.62 +08 29 29.1 V G45
2016-06-17 08:56:43 C 22 20 34.18 +08 30 32.7 V G45
2016-06-17 09:23:31 C 22 20 34.00 +08 31 01.0 V G45
2016-06-17 10:19:47 C 22 20 33.42 +08 31 58.6 V G45
2016-07-04 08:54:30 C 22 12 04.11 +15 33 38.6 q 703
2016-07-04 09:01:00 C 22 12 03.87 +15 33 44.7 q 703
2016-07-04 09:07:29 C 22 12 03.65 +15 33 51.6 q 703
2016-07-04 09:13:58 C 22 12 03.39 +15 33 58.3 q 703
2016-07-07 08:06:29 C 22 09 18.50 +16 45 25.7 R G45
2016-07-07 08:13:51 C 22 09 18.19 +16 45 32.9 R G45
2016-07-07 08:21:28 C 22 09 17.85 +16 45 40.8 R G45
2016-07-07 08:28:15 C 22 09 17.57 +16 45 47.3 R G45
2016-07-07 08:43:35 C 22 09 16.91 +16 46 02.9 R G45
2016-07-09 07:32:06 C 22 07 15.00 +17 32 27.4 q 703
2016-07-09 07:37:52 C 22 07 14.78 +17 32 33.0 q 703
2016-07-09 07:43:39 C 22 07 14.47 +17 32 38.5 q 703
2016-07-09 07:49:26 C 22 07 14.20 +17 32 44.7 q 703
2016-07-15 05:59:02 C 22 00 01.06 +19 48 38.0 q 703
2016-07-15 06:07:46 C 22 00 00.55 +19 48 46.9 q 703
2016-07-15 06:25:10 C 21 59 59.47 +19 49 03.6 q 703
2016-07-19 05:26:36 C 21 54 18.64 +21 14 21.8 u H21
2016-07-19 05:35:38 C 21 54 18.07 +21 14 29.5 u H21
2016-07-19 05:44:00 C 21 54 17.51 +21 14 36.8 u H21
2016-07-19 05:50:43 C 21 54 17.10 +21 14 42.5 u H21
2016-07-27 18:34:04 C 21 39 57.27 +23 57 46.1 q D29
2016-07-27 18:58:15 C 21 39 55.38 +23 58 03.7 q D29
2016-07-29 01:28:41 C 21 37 34.89 +24 19 26.1 o Z22
2016-07-29 01:43:25 C 21 37 33.73 +24 19 36.2 o Z22
2016-07-29 01:54:40 C 21 37 32.82 +24 19 44.3 o Z22
2016-08-01 15:47:28 C 21 30 42.52 +25 15 08.8 q D29
2016-08-01 16:09:07 C 21 30 40.75 +25 15 20.2 q D29
2016-08-01 23:20:07 C 21 30 05.65 +25 19 37.3 18.4 c 122
2016-08-01 23:25:41 C 21 30 05.23 +25 19 40.6 18.6 c 122
2016-08-01 23:32:40 C 21 30 04.60 +25 19 44.6 19.3 c 122
2016-08-15 21:17:26 C 21 01 57.29 +27 39 02.9 q Z52
2016-08-15 21:54:07 C 21 01 54.18 +27 39 11.3 q Z52
2016-08-15 22:38:26 C 21 01 50.43 +27 39 22.2 q Z52
2016-08-16 22:22:58 C 20 59 51.89 +27 44 38.9 q Z52