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
2008-12-04 12:17:15 C 10 23 34.00 +10 30 59.8 r G96
2008-12-31 10:13:59 C 10 39 55.03 -13 46 03.7 r 448
2008-12-31 10:19:55 C 10 39 54.92 -13 46 20.3 r 448
2008-12-31 10:25:52 C 10 39 54.94 -13 46 35.8 r 448
2008-12-31 10:31:47 C 10 39 54.96 -13 46 53.5 r 448
2009-01-03 09:26:25 C 10 39 47.75 -17 07 12.1 r 448
2009-01-03 09:29:24 C 10 39 47.70 -17 07 21.0 r 448
2009-01-03 09:31:46 C 10 39 47.72 -17 07 27.6 r 448
2009-01-29 05:58:39 C 10 10 37.83 -47 31 46.2 r 808
2009-01-29 06:10:09 C 10 10 36.49 -47 32 17.6 r 808
2009-01-29 06:19:40 C 10 10 35.66 -47 32 38.0 r 808
2009-02-23 02:39:59 C 08 33 12.22 -65 07 04.8 r 808
2009-02-23 02:50:00 C 08 33 10.30 -65 07 12.8 r 808
2009-02-23 03:06:29 C 08 33 06.73 -65 07 26.9 r 808
2009-03-04 14:15:45 C 07 48 01.69 -67 17 26.9 r E12
2009-03-04 14:28:01 C 07 47 59.35 -67 17 30.5 r E12
2009-03-04 14:39:48 C 07 47 57.15 -67 17 34.2 r E12
2009-03-05 10:41:45 C 07 44 20.34 -67 23 43.9 r 432
2009-03-05 11:00:20 C 07 44 16.84 -67 23 50.9 r 432
2009-03-05 11:17:10 C 07 44 13.65 -67 23 53.8 r 432
2009-03-07 12:22:39 C 07 35 39.22 -67 35 50.3 r E12
2009-03-07 12:31:13 C 07 35 37.71 -67 35 51.6 r E12
2009-03-07 12:39:46 C 07 35 36.24 -67 35 53.3 r E12
2009-03-07 12:48:21 C 07 35 34.72 -67 35 54.4 r E12
2009-03-08 09:58:12 C 07 32 04.21 -67 39 55.4 r 432
2009-03-08 10:18:56 C 07 32 00.67 -67 39 58.3 r 432
2009-03-26 08:57:12 C 06 45 10.25 -67 28 02.0 r 432
2009-03-26 09:32:39 C 06 45 08.09 -67 27 57.1 r 432
2009-03-26 10:09:28 C 06 45 05.99 -67 27 51.3 r 432
2009-04-08 11:26:57 C 06 39 57.02 -66 47 19.3 r E16
2009-04-08 11:43:00 C 06 39 57.25 -66 47 17.1 r E16
2009-04-16 10:18:59 C 06 46 48.75 -66 31 07.0 r E12
2009-04-16 10:32:39 C 06 46 49.44 -66 31 05.7 r E12
2009-04-16 10:39:31 C 06 46 49.80 -66 31 04.8 r E12
2009-04-18 09:18:52 C 06 49 35.28 -66 28 31.5 r 432
2009-04-18 09:47:38 C 06 49 36.76 -66 28 31.3 r 432
2009-04-25 08:28:12 C 07 02 55.10 -66 23 58.3 r 432
2009-04-25 08:44:21 C 07 02 56.83 -66 23 58.1 r 432
2009-04-25 09:00:19 C 07 02 58.11 -66 23 58.0 r 432
2009-04-26 08:18:20 C 07 05 16.06 -66 23 51.8 r 432
2009-04-26 08:38:11 C 07 05 17.95 -66 23 52.6 r 432
2009-04-26 08:54:20 C 07 05 19.57 -66 23 52.1 r 432
2009-05-14 08:06:52 C 08 07 56.07 -66 32 09.7 r 432
2009-05-14 08:27:27 C 08 07 59.96 -66 32 09.9 r 432
2009-05-14 08:48:37 C 08 08 03.93 -66 32 09.6 r 432
2009-05-15 09:48:57 C 08 12 54.34 -66 32 00.5 r 432
2009-05-15 10:07:45 C 08 12 57.96 -66 31 59.3 r 432
2009-05-15 10:26:26 C 08 13 01.59 -66 31 58.1 r 432
2009-06-10 22:59:00 C 10 51 43.57 -63 33 12.0 r 808
2009-06-10 23:10:30 C 10 51 46.32 -63 33 04.3 r 808