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
1954-01-04 02:53:00 01 20 15.33 +52 03 58.3 261
1954-01-04 03:04:59 01 20 16.41 +52 03 44.3 261
1974-02-23 02:44:09 08 36 29.02 -65 22 17.7 262
1999-12-20 03:42:25 C 02 38 36.84 +65 28 40.6 18.2 a 704
1999-12-20 04:04:24 C 02 38 36.24 +65 28 06.9 18.5 a 704
1999-12-20 04:25:54 C 02 38 35.52 +65 27 34.4 18.5 a 704
1999-12-20 04:47:26 C 02 38 34.99 +65 27 01.0 18.5 a 704
1999-12-20 05:09:10 C 02 38 34.37 +65 26 27.8 18.4 a 704
1999-12-28 03:31:24 C 02 37 31.52 +60 21 46.9 18.1 a 704
1999-12-28 03:54:57 C 02 37 31.69 +60 21 08.1 18.1 a 704
1999-12-28 04:19:04 C 02 37 31.87 +60 20 27.8 18.7 a 704
1999-12-28 04:44:09 C 02 37 32.00 +60 19 46.3 18.4 a 704
1999-12-28 05:06:23 C 02 37 32.14 +60 19 08.5 19.0 a 704
1999-12-29 04:07:26 C 02 37 50.33 +59 40 39.5 18.9 a 704
1999-12-29 04:07:35 C 02 37 50.32 +59 40 39.9 18.7 a 704
1999-12-29 04:28:39 C 02 37 50.47 +59 40 04.1 18.4 a 704
1999-12-29 04:28:49 C 02 37 50.53 +59 40 04.1 18.5 a 704
1999-12-29 04:49:43 C 02 37 50.75 +59 39 28.9 18.8 a 704
1999-12-29 04:49:53 C 02 37 50.71 +59 39 28.7 18.9 a 704
1999-12-29 05:12:03 C 02 37 50.96 +59 38 50.7 18.6 a 704
1999-12-29 05:12:13 C 02 37 51.05 +59 38 51.2 18.7 a 704
1999-12-29 05:33:20 C 02 37 51.17 +59 38 14.2 18.6 a 704
1999-12-29 05:33:30 C 02 37 51.19 +59 38 13.9 18.8 a 704
1999-12-30 03:16:53 C 02 38 13.25 +59 01 42.8 18.1 a 704
1999-12-30 03:17:03 C 02 38 13.29 +59 01 42.4 18.1 a 704
1999-12-30 03:38:27 C 02 38 13.58 +59 01 06.6 18.4 a 704
1999-12-30 03:38:38 C 02 38 13.57 +59 01 06.3 18.4 a 704
1999-12-30 03:59:48 C 02 38 13.85 +59 00 30.2 18.7 a 704
1999-12-30 03:59:57 C 02 38 13.95 +59 00 30.6 18.4 a 704
1999-12-30 04:21:09 C 02 38 14.15 +58 59 53.8 18.7 a 704
1999-12-30 04:21:19 C 02 38 14.18 +58 59 53.9 18.9 a 704
1999-12-30 04:42:25 C 02 38 14.44 +58 59 17.8 18.9 a 704
1999-12-30 04:42:35 C 02 38 14.42 +58 59 18.0 18.7 a 704
1999-12-31 01:28:44 C 02 38 39.71 +58 24 09.2 18.0 a 704
1999-12-31 01:28:54 C 02 38 39.78 +58 24 08.9 18.4 a 704
1999-12-31 01:29:02 C 02 38 39.75 +58 24 08.5 18.4 a 704
1999-12-31 01:51:28 C 02 38 40.15 +58 23 31.1 18.1 a 704
1999-12-31 01:51:37 C 02 38 40.06 +58 23 31.0 18.7 a 704
1999-12-31 01:51:46 C 02 38 40.12 +58 23 30.5 18.5 a 704
1999-12-31 02:13:54 C 02 38 40.51 +58 22 52.9 18.3 a 704
1999-12-31 02:14:04 C 02 38 40.46 +58 22 53.2 18.8 a 704
1999-12-31 02:14:13 C 02 38 40.47 +58 22 52.9 18.6 a 704
1999-12-31 02:59:21 C 02 38 41.37 +58 21 35.4 18.7 a 704
1999-12-31 02:59:32 C 02 38 41.33 +58 21 35.0 19.0 a 704
1999-12-31 02:59:40 C 02 38 41.22 +58 21 34.7 19.0 a 704
2000-01-05 20:11:42 C 02 42 45.02 +54 26 35.0 118
2000-01-05 20:13:38 C 02 42 45.12 +54 26 31.8 118
2000-01-05 20:18:20 C 02 42 45.25 +54 26 23.6 118
2000-01-11 01:44:36 C 02 48 11.20 +50 51 03.4 18.2 a 704
2000-01-11 02:06:19 C 02 48 12.13 +50 50 26.4 18.6 a 704