IAA RAS IAA Minor Planet Database

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
2020-02-12 10:13:14 S 13 02 09.09 -69 10 34.7 – L C51
2020-02-12 19:38:22 S 13 03 05.777 -69 28 25.93 – L C51
2020-02-13 05:03:30 S 13 04 03.168 -69 46 11.93 – L C51
2020-02-13 08:11:49 S 13 04 22.28 -69 52 04.6 – L C51
2020-02-13 14:28:39 S 13 05 01.00 -70 03 49.6 – L C51
2020-02-13 17:36:57 S 13 05 20.36 -70 09 41.5 – L C51
2020-02-13 20:45:28 S 13 05 40.04 -70 15 31.8 – L C51
2020-02-14 09:18:55 S 13 06 58.93 -70 38 46.1 – L C51
2020-02-14 12:27:14 S 13 07 18.502 -70 44 33.58 – L C51
2020-02-14 18:44:03 S 13 07 58.646 -70 56 05.28 – L C51
2020-02-15 07:17:30 S 13 09 19.423 -71 18 58.75 – L C51
2020-03-15 06:41:31 S 16 42 19.277 -86 29 53.27 – L C51
2020-03-15 12:58:09 S 16 48 11.801 -86 33 36.68 – L C51
2020-03-15 16:06:28 S 16 51 12.475 -86 35 24.18 – L C51
2020-03-15 19:14:58 S 16 54 14.952 -86 37 10.20 – L C51
2020-03-16 01:31:36 S 17 00 27.331 -86 40 34.36 – L C51
2020-03-16 04:39:55 S 17 03 37.318 -86 42 12.64 – L C51
2020-03-25 14:42:27 S 21 13 36.710 -86 50 21.34 – L C51
2020-03-25 17:50:46 S 21 16 12.173 -86 49 17.00 – L C51
2020-03-25 20:59:05 S 21 18 45.432 -86 48 11.74 – L C51
2020-03-26 00:07:24 S 21 21 14.556 -86 47 04.81 – L C51
2020-03-26 06:24:14 S 21 26 08.964 -86 44 51.54 – L C51
2020-03-26 14:15:07 S 21 32 03.994 -86 41 57.84 – L C51
2020-03-26 15:49:11 S 21 33 12.521 -86 41 22.60 – L C51
2020-03-26 17:23:26 S 21 34 22.80 -86 40 47.5 – L C51
2020-03-26 18:57:29 S 21 35 30.34 -86 40 12.7 – L C51
2020-03-26 20:31:44 S 21 36 37.11 -86 39 36.5 – L C51
2020-03-26 22:06:00 S 21 37 44.07 -86 39 01.0 – L C51
2020-03-26 23:40:04 S 21 38 51.50 -86 38 25.6 – L C51
2020-03-27 04:22:38 S 21 42 07.951 -86 36 35.96 – L C51
2020-03-27 05:56:53 S 21 43 12.842 -86 35 59.03 – L C51
2020-03-27 09:05:12 S 21 45 19.920 -86 34 46.20 – L C51
2020-03-27 13:47:46 S 21 48 27.806 -86 32 54.85 – L C51
2020-03-27 15:21:50 S 21 49 29.777 -86 32 18.13 – L C51
2020-03-27 20:04:24 S 21 52 31.286 -86 30 25.06 – L C51
2020-03-27 21:38:39 S 21 53 31.490 -86 29 47.40 – L C51
2020-03-27 23:12:43 S 21 54 30.432 -86 29 10.00 – L C51
2020-03-28 00:46:58 S 21 55 29.095 -86 28 31.58 – L C51
2020-03-28 02:21:02 S 21 56 28.349 -86 27 53.17 – L C51
2020-03-28 10:12:06 S 22 01 11.822 -86 24 41.40 – L C51
2020-03-28 11:46:10 S 22 02 07.86 -86 24 03.5 – L C51
2020-03-28 16:28:45 S 22 04 51.266 -86 22 07.07 – L C51
2020-03-28 18:02:48 S 22 05 45.319 -86 21 29.38 – L C51
2020-03-28 19:37:04 S 22 06 38.39 -86 20 50.0 – L C51
2020-03-28 21:11:07 S 22 07 31.52 -86 20 10.4 – L C51
2020-03-28 21:11:19 S 22 07 31.62 -86 20 10.9 – L C51
2020-03-28 22:45:23 S 22 08 26.215 -86 19 33.82 – L C51
2020-03-29 00:19:38 S 22 09 16.98 -86 18 52.5 – L C51
2020-03-29 01:53:42 S 22 10 08.46 -86 18 13.7 – L C51
2020-03-29 05:02:11 S 22 11 50.23 -86 16 55.7 – L C51