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
2003-08-23 09:30:59 C 22 01 18.66 +43 38 05.7 c 670
2005-06-18 09:30:15 C 22 00 08.84 +01 15 04.9 o 699
2005-06-18 09:50:05 C 22 00 08.35 +01 15 25.9 o 699
2005-06-18 10:09:58 C 22 00 07.85 +01 15 45.4 o 699
2005-06-18 10:29:50 C 22 00 07.40 +01 16 05.3 o 699
2005-06-24 07:18:40 C 21 56 19.07 +03 37 33.4 r 649
2005-06-24 07:28:54 C 21 56 18.67 +03 37 43.8 r 649
2005-07-02 08:29:43 C 21 48 31.24 +06 50 19.1 r 703
2005-07-02 08:39:10 C 21 48 30.74 +06 50 28.3 r 703
2005-07-02 08:48:34 C 21 48 30.27 +06 50 37.6 r 703
2005-07-02 08:57:58 C 21 48 29.84 +06 50 46.8 r 703
2005-07-06 06:28:28 C 21 43 37.95 +08 21 51.4 o 699
2005-07-06 06:57:26 C 21 43 36.33 +08 22 19.3 o 699
2005-07-06 07:26:25 C 21 43 34.64 +08 22 47.2 o 699
2005-07-06 07:55:23 C 21 43 33.00 +08 23 15.7 o 699
2005-07-16 08:35:38 C 21 27 54.97 +12 02 53.1 r 703
2005-07-16 08:44:49 C 21 27 54.25 +12 03 00.0 r 703
2005-07-16 08:54:04 C 21 27 53.60 +12 03 07.9 r 703
2005-07-16 09:03:17 C 21 27 52.84 +12 03 16.5 r 703
2005-07-27 05:14:57 C 21 07 03.49 +15 20 40.8 18.3 o 644
2005-07-27 07:12:30 C 21 06 53.26 +15 21 58.2 18.3 o 644
2005-07-27 08:50:21 C 21 06 44.70 +15 23 01.9 18.3 o 644
2005-07-27 22:03:32 C 21 05 37.07 +15 31 30.3 o 240
2005-07-27 22:07:28 C 21 05 36.74 +15 31 32.5 o 240
2005-07-27 22:15:21 C 21 05 36.07 +15 31 37.4 o 240
2005-07-27 22:19:17 C 21 05 35.73 +15 31 40.0 o 240
2005-07-29 06:38:24 C 21 02 48.82 +15 51 49.3 18.9 c 704
2005-07-29 06:54:45 C 21 02 47.43 +15 51 59.3 19.3 c 704
2005-07-29 07:11:03 C 21 02 45.90 +15 52 09.1 19.0 c 704
2005-07-29 07:27:22 C 21 02 44.52 +15 52 18.9 18.8 c 704
2005-07-29 07:44:03 C 21 02 42.99 +15 52 28.8 19.1 c 704
2005-08-29 19:51:55 C 20 04 45.08 +19 00 30.7 r A13
2005-08-29 20:14:10 C 20 04 43.86 +19 00 29.2 r A13
2006-12-26 16:46:08 C 13 29 46.32 -40 33 32.0 r E12
2006-12-26 16:57:16 C 13 29 47.94 -40 33 48.7 r E12
2006-12-26 17:19:35 C 13 29 51.36 -40 34 23.5 r E12
2007-04-07 18:21:42 C 20 39 32.94 -52 12 40.9 r E12
2007-04-07 18:33:15 C 20 39 33.91 -52 12 35.0 r E12
2007-04-25 18:08:10 C 21 08 15.57 -48 35 26.4 r E12
2007-04-25 18:20:32 C 21 08 15.97 -48 35 21.2 r E12
2007-04-25 18:32:59 C 21 08 16.62 -48 35 14.7 r E12
2007-04-25 18:45:27 C 21 08 17.08 -48 35 09.6 r E12
2007-05-20 18:03:59 C 21 17 00.56 -43 45 01.4 r E12
2007-05-20 18:58:01 C 21 16 59.37 -43 44 35.7 r E12
2007-05-20 19:16:56 C 21 16 58.94 -43 44 26.0 r E12
2007-06-09 18:51:26 C 20 52 41.34 -39 19 13.6 r E12
2007-06-09 19:10:07 C 20 52 39.75 -39 19 01.4 r E12
2007-06-09 19:28:56 C 20 52 38.13 -39 18 48.9 r E12
2007-07-12 14:30:13 C 19 23 29.23 -26 25 21.7 r 428
2007-07-12 15:00:29 C 19 23 25.68 -26 24 44.5 r 428