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
2021-11-04 08:24:39 C 08 33 16.82 +54 05 18.9 U I41
2021-11-04 08:46:52 C 08 33 17.98 +54 05 15.1 U I41
2021-11-04 11:47:28 C 08 33 27.39 +54 04 43.8 U I41
2021-11-04 12:34:49 C 08 33 29.79 +54 04 35.2 U I41
2021-11-04 14:23:15 C 08 33 35.79 +54 04 15.7 V T08
2021-11-04 14:27:54 C 08 33 36.10 +54 04 15.3 V T08
2021-11-04 15:05:51 C 08 33 38.02 +54 04 08.4 V T08
2021-11-04 15:18:36 C 08 33 38.63 +54 04 06.0 V T08
2021-11-05 09:04:57 C 08 34 35.37 +54 00 37.7 V 703
2021-11-05 09:12:50 C 08 34 35.76 +54 00 36.6 V 703
2021-11-05 09:20:42 C 08 34 36.16 +54 00 35.4 V 703
2021-11-05 09:28:35 C 08 34 36.52 +54 00 33.6 V 703
2021-11-06 09:04:44 C 08 35 48.31 +53 56 01.0 V 703
2021-11-06 09:13:43 C 08 35 48.80 +53 55 58.4 V 703
2021-11-06 09:21:37 C 08 35 49.20 +53 55 57.6 V 703
2021-11-06 09:29:33 C 08 35 49.61 +53 55 56.2 V 703
2021-11-06 13:45:06 C 08 36 01.89 +53 55 09.0 V T05
2021-11-06 13:49:43 C 08 36 02.22 +53 55 08.4 V T05
2021-11-06 13:57:40 C 08 36 02.53 +53 55 06.9 V T05
2021-11-06 14:17:03 C 08 36 03.42 +53 55 04.8 V T05
2021-11-06 14:20:21 C 08 36 03.56 +53 55 02.3 V T05
2021-11-06 14:25:39 C 08 36 03.89 +53 55 01.1 V T05
2021-11-06 14:29:36 C 08 36 04.00 +53 55 00.3 V T05
2021-11-06 14:58:12 C 08 36 05.33 +53 54 55.5 V T05
2021-11-07 08:23:14 C 08 36 55.97 +53 51 26.4 U I41
2021-11-07 08:47:57 C 08 36 57.10 +53 51 22.1 U I41
2021-11-07 10:50:56 C 08 37 02.63 +53 51 00.2 U I41
2021-11-07 11:46:43 C 08 37 05.08 +53 50 49.9 U I41
2021-11-07 12:15:04 C 08 37 06.33 +53 50 44.5 U I41
2021-11-08 08:09:37 C 08 38 01.40 +53 46 44.8 U I41
2021-11-08 08:44:02 C 08 38 02.91 +53 46 38.7 U I41
2021-11-08 10:52:14 C 08 38 08.35 +53 46 15.6 U I41
2021-11-08 12:16:29 C 08 38 11.83 +53 45 59.7 U I41
2021-11-08 12:58:21 C 08 38 14.07 +53 45 51.9 V T08
2021-11-08 13:02:23 C 08 38 14.22 +53 45 50.7 V T08
2021-11-08 13:11:04 C 08 38 14.58 +53 45 49.6 V T08
2021-11-08 13:27:05 C 08 38 15.21 +53 45 46.0 V T08
2021-11-09 08:59:42 C 08 39 05.76 +53 41 49.2 V 703
2021-11-09 09:07:40 C 08 39 06.17 +53 41 47.0 V 703
2021-11-09 09:15:38 C 08 39 06.45 +53 41 45.3 V 703
2021-11-09 09:23:36 C 08 39 06.81 +53 41 45.1 V 703
2021-11-10 13:28:41 C 08 40 14.751 +53 36 06.00 U F52
2021-11-10 13:48:57 C 08 40 15.478 +53 36 02.20 U F52
2021-11-10 14:09:06 C 08 40 16.193 +53 35 58.30 U F52
2021-11-11 11:22:38 C 08 41 04.00 +53 31 35.5 V G96
2021-11-11 11:32:26 C 08 41 04.33 +53 31 33.5 V G96
2021-11-11 11:42:13 C 08 41 04.65 +53 31 31.5 V G96
2021-11-11 11:52:01 C 08 41 04.98 +53 31 29.6 V G96
2021-11-12 13:57:38 C 08 41 59.80 +53 26 04.2 V T08
2021-11-12 14:00:17 C 08 41 59.90 +53 26 03.8 V T08