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
2007-07-16 05:48:58 C 19 13 49.82 -24 37 43.3 17.6 c 704
2007-07-16 06:04:54 C 19 13 48.08 -24 37 22.8 17.6 c 704
2007-07-16 06:19:31 C 19 13 46.58 -24 37 03.7 17.8 c 704
2007-07-16 06:35:24 C 19 13 44.71 -24 36 44.7 17.6 c 704
2007-07-16 06:50:02 C 19 13 43.11 -24 36 27.4 17.8 c 704
2007-07-19 05:33:39 C 19 06 26.20 -23 09 54.9 17.1 c 704
2007-07-19 05:48:40 C 19 06 24.58 -23 09 37.7 17.6 c 704
2007-07-19 06:04:46 C 19 06 22.94 -23 09 18.1 17.7 c 704
2007-07-19 06:19:55 C 19 06 21.35 -23 08 58.9 17.7 c 704
2007-07-19 06:34:50 C 19 06 19.91 -23 08 41.1 17.5 c 704
2007-08-07 02:33:00 C 18 33 25.86 -15 05 51.0 r 808
2007-08-07 02:46:30 C 18 33 25.10 -15 05 35.6 r 808
2007-08-07 02:59:00 C 18 33 24.38 -15 05 24.9 r 808
2008-09-29 11:42:07 C 08 25 19.34 +39 07 59.2 r 703
2008-09-29 11:49:11 C 08 25 20.10 +39 07 55.8 r 703
2008-09-29 11:56:15 C 08 25 20.78 +39 07 51.0 r 703
2008-09-29 12:03:28 C 08 25 21.46 +39 07 46.2 r 703
2008-10-08 10:02:11 C 08 46 22.40 +36 40 31.2 19.3 c 704
2008-10-08 10:39:12 C 08 46 25.80 +36 40 05.3 20.0 c 704
2008-10-08 10:57:38 C 08 46 27.53 +36 39 52.4 19.8 c 704
2008-10-08 11:16:03 C 08 46 29.24 +36 39 38.6 19.9 c 704
2008-10-26 12:04:57 C 09 24 21.09 +30 38 14.3 r 703
2008-10-26 12:14:28 C 09 24 21.88 +30 38 05.7 r 703
2008-10-26 12:23:55 C 09 24 22.60 +30 37 56.4 r 703
2008-10-26 12:33:23 C 09 24 23.32 +30 37 48.3 r 703
2008-10-27 10:43:45 C 09 26 09.81 +30 16 42.9 r 703
2008-10-27 10:55:36 C 09 26 10.78 +30 16 32.1 r 703
2008-10-27 11:07:35 C 09 26 11.65 +30 16 21.2 r 703
2008-10-27 11:20:53 C 09 26 12.76 +30 16 08.1 r 703
2008-11-04 10:16:57 C 09 40 45.46 +27 02 50.2 19.3 c 704
2008-11-04 10:34:06 C 09 40 46.65 +27 02 31.6 19.3 c 704
2008-11-04 10:52:35 C 09 40 47.94 +27 02 11.7 19.5 c 704
2008-11-04 11:09:53 C 09 40 49.22 +27 01 53.5 19.4 c 704
2008-11-04 11:27:22 C 09 40 50.42 +27 01 34.8 19.3 c 704
2008-11-22 12:27:26 C 10 08 59.02 +18 06 35.3 r 703
2008-11-22 12:28:18 C 10 08 59.13 +18 06 34.0 r 703
2008-11-22 12:34:20 C 10 08 59.46 +18 06 26.2 r 703
2008-11-22 12:35:13 C 10 08 59.42 +18 06 24.8 r 703
2008-11-22 12:41:11 C 10 08 59.85 +18 06 16.4 r 703
2008-11-22 12:42:03 C 10 08 59.82 +18 06 15.0 r 703
2008-11-22 12:48:06 C 10 09 00.21 +18 06 07.9 r 703
2008-11-22 12:48:59 C 10 09 00.21 +18 06 05.5 r 703
2008-12-02 10:32:32 C 10 21 18.99 +11 56 50.1 18.1 c 704
2008-12-02 10:50:51 C 10 21 19.81 +11 56 19.3 18.2 c 704
2008-12-02 11:09:14 C 10 21 20.63 +11 55 47.8 18.7 c 704
2008-12-02 11:27:26 C 10 21 21.42 +11 55 17.1 18.5 c 704
2008-12-02 11:45:39 C 10 21 22.24 +11 54 46.0 18.3 c 704
2008-12-04 11:28:41 C 10 23 32.02 +10 32 25.0 r G96
2008-12-04 11:44:51 C 10 23 32.67 +10 31 56.7 r G96
2008-12-04 12:01:03 C 10 23 33.36 +10 31 28.3 r G96