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
2010-11-19 09:17:35 C 07 26 37.49 +68 08 40.3 18.3 c 704
2010-11-19 09:35:59 C 07 26 36.32 +68 08 43.1 18.5 c 704
2010-11-19 09:54:38 C 07 26 35.13 +68 08 45.5 18.6 c 704
2010-11-19 10:13:08 C 07 26 33.87 +68 08 48.0 18.9 c 704
2010-11-19 10:31:35 C 07 26 32.60 +68 08 50.4 18.6 c 704
2010-12-13 08:11:56 C 06 09 09.61 +66 20 34.1 r 703
2010-12-13 08:17:51 C 06 09 08.42 +66 20 30.5 r 703
2010-12-13 08:23:37 C 06 09 07.38 +66 20 26.6 r 703
2010-12-13 08:29:31 C 06 09 06.19 +66 20 21.6 r 703
2011-01-15 20:28:07 C 04 32 04.71 +43 45 15.9 u 160
2011-01-15 20:29:38 C 04 32 04.66 +43 45 12.5 u 160
2011-01-15 20:31:00 C 04 32 04.61 +43 45 09.3 u 160
2011-01-20 19:13:28 C 04 29 13.83 +39 22 11.2 w I99
2011-01-20 19:17:44 C 04 29 13.75 +39 22 01.7 w I99
2011-01-20 19:22:04 C 04 29 13.65 +39 21 52.5 w I99
2011-01-21 19:27:55 C 04 28 54.86 +38 29 16.6 u A06
2011-01-21 19:34:48 C 04 28 54.75 +38 29 01.6 u A06
2011-01-21 19:49:42 C 04 28 54.53 +38 28 29.2 u A06
2011-01-22 18:51:10 C 04 28 41.58 +37 38 35.9 c A53
2011-01-22 19:01:10 C 04 28 41.45 +37 38 14.6 c A53
2011-01-22 19:11:40 C 04 28 41.36 +37 37 51.9 c A53
2011-01-22 19:23:15 C 04 28 41.23 +37 37 26.7 c A53
2011-01-22 22:28:31 C 04 28 39.26 +37 30 45.5 r 203
2011-01-23 01:38:17 C 04 28 37.63 +37 23 52.8 r 203
2011-01-25 00:05:30 C 04 28 27.77 +35 44 51.4 u I15
2011-01-25 00:13:57 C 04 28 27.74 +35 44 33.5 u I15
2011-01-25 00:22:23 C 04 28 27.71 +35 44 15.5 u I15
2011-01-28 03:22:18 C 04 28 44.32 +33 08 34.7 G92
2011-01-28 03:43:20 C 04 28 44.43 +33 07 52.0 G92
2011-01-28 04:04:21 C 04 28 44.52 +33 07 08.5 G92
2011-01-29 19:00:27 C 04 29 08.85 +31 48 37.9 o 639
2011-01-29 19:11:26 C 04 29 08.94 +31 48 16.6 o 639
2011-01-29 19:17:24 C 04 29 08.99 +31 48 04.7 o 639
2011-01-29 19:31:24 C 04 29 09.14 +31 47 36.8 o 639
2011-01-29 19:43:14 C 04 29 09.24 +31 47 13.0 o 639
2011-01-30 17:44:34 C 04 29 27.68 +31 03 38.5 u 240
2011-01-30 17:47:14 C 04 29 27.71 +31 03 33.4 u 240
2011-01-30 17:49:53 C 04 29 27.78 +31 03 27.3 u 240
2011-01-30 17:55:11 C 04 29 27.81 +31 03 17.9 u 240
2011-01-30 17:58:23 C 04 29 27.85 +31 03 11.6 u 240
2011-01-30 18:01:02 C 04 29 27.88 +31 03 06.4 u 240
2011-01-30 22:05:26 C 04 29 31.09 +30 55 05.6 o J16
2011-01-30 22:16:45 C 04 29 31.25 +30 54 43.3 o J16
2011-01-30 22:26:28 C 04 29 31.34 +30 54 24.1 o J16
2011-01-31 18:34:14 C 04 29 51.41 +30 15 12.6 o 639
2011-01-31 18:45:40 C 04 29 51.57 +30 14 51.2 o 639
2011-01-31 18:51:40 C 04 29 51.67 +30 14 38.9 o 639
2011-02-01 10:23:07 C 04 30 08.64 +29 44 49.0 o 300
2011-02-01 10:26:04 C 04 30 08.70 +29 44 42.7 o 300
2011-02-01 10:30:29 C 04 30 08.75 +29 44 34.9 o 300