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
2011-02-01 10:31:58 C 04 30 08.75 +29 44 32.2 o 300
2011-02-01 10:34:58 C 04 30 08.81 +29 44 26.0 o 300
2011-02-01 10:36:27 C 04 30 08.82 +29 44 23.5 o 300
2011-02-01 10:37:57 C 04 30 08.85 +29 44 19.9 o 300
2011-02-04 21:44:57 C 04 32 01.64 +27 09 26.7 c A24
2011-02-04 21:46:20 C 04 32 01.65 +27 09 24.5 c A24
2011-02-04 22:00:19 C 04 32 02.00 +27 08 59.0 c A24
2011-02-04 22:15:40 C 04 32 02.34 +27 08 31.0 c A24
2011-02-04 22:29:40 C 04 32 02.71 +27 08 05.7 c A24
2011-02-04 22:31:02 C 04 32 02.74 +27 08 03.2 c A24
2011-02-05 20:50:43 C 04 32 39.63 +26 28 00.6 c A24
2011-02-05 20:52:05 C 04 32 39.64 +26 27 58.2 c A24
2011-02-05 21:06:33 C 04 32 40.04 +26 27 32.4 c A24
2011-02-05 21:21:29 C 04 32 40.42 +26 27 05.7 c A24
2011-02-05 21:35:29 C 04 32 40.80 +26 26 40.6 c A24
2011-02-05 21:36:51 C 04 32 40.84 +26 26 38.5 c A24
2011-02-06 03:31:25 C 04 32 51.25 +26 16 12.2 r 703
2011-02-06 03:42:19 C 04 32 51.54 +26 15 52.2 r 703
2011-02-06 03:53:11 C 04 32 51.86 +26 15 32.9 r 703
2011-02-06 04:04:03 C 04 32 52.08 +26 15 13.4 r 703
2011-02-06 04:15:02 C 04 32 52.36 +26 14 54.4 r 703
2011-02-07 20:21:17 C 04 34 05.72 +25 04 56.1 c A24
2011-02-07 20:22:39 C 04 34 05.74 +25 04 53.8 c A24
2011-02-07 20:36:41 C 04 34 06.18 +25 04 29.5 c A24
2011-02-07 20:51:37 C 04 34 06.64 +25 04 03.8 c A24
2011-02-07 21:06:06 C 04 34 07.08 +25 03 38.6 c A24
2011-02-07 21:07:28 C 04 34 07.12 +25 03 36.4 c A24
2011-02-08 02:03:15 C 04 34 17.15 +24 55 12.7 18.4 c 704
2011-02-08 02:22:12 C 04 34 17.64 +24 54 40.3 18.6 c 704
2011-02-08 02:40:31 C 04 34 18.20 +24 54 08.6 18.4 c 704
2011-02-08 02:59:09 C 04 34 18.74 +24 53 36.9 18.5 c 704
2011-02-08 03:17:59 C 04 34 19.32 +24 53 05.0 18.3 c 704
2011-02-08 18:40:02 C 04 34 50.01 +24 26 56.2 c A24
2011-02-08 18:41:24 C 04 34 50.06 +24 26 54.0 c A24
2011-02-08 20:50:12 C 04 34 54.05 +24 23 16.1 c A24
2011-02-08 20:51:34 C 04 34 54.11 +24 23 14.0 c A24
2011-02-08 21:35:02 C 04 34 55.49 +24 22 00.5 c A24
2011-02-08 21:36:25 C 04 34 55.53 +24 21 58.0 c A24
2011-02-10 03:02:10 C 04 35 57.58 +23 32 59.8 r G96
2011-02-10 03:12:49 C 04 35 57.94 +23 32 42.1 r G96
2011-02-10 03:23:37 C 04 35 58.30 +23 32 24.3 r G96
2011-02-10 03:34:31 C 04 35 58.66 +23 32 06.5 r G96
2011-02-10 19:45:55 C 04 36 34.18 +23 05 35.2 c A24
2011-02-10 19:47:17 C 04 36 34.21 +23 05 32.4 c A24
2011-02-10 20:12:38 C 04 36 35.11 +23 04 51.5 c A24
2011-02-10 21:04:42 C 04 36 36.94 +23 03 26.6 c A24
2011-02-21 19:30:14 C 04 48 25.39 +16 39 16.9 r B60
2011-02-21 19:54:39 C 04 48 26.59 +16 38 45.0 r B60
2011-02-25 03:47:51 C 04 52 43.27 +14 57 11.2 18.3 c 704
2011-02-25 04:05:17 C 04 52 44.18 +14 56 50.4 18.4 c 704