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
2019-12-30 12:45:47 S 11 42 40.440 -27 55 42.96 – L C51
2019-12-30 14:20:35 S 11 42 46.862 -27 59 37.50 – L C51
2019-12-30 15:54:50 S 11 42 53.25 -28 03 30.7 – L C51
2019-12-30 17:29:05 S 11 42 59.57 -28 07 23.8 – L C51
2019-12-30 20:37:24 S 11 43 12.30 -28 15 11.9 – L C51
2019-12-30 22:11:39 S 11 43 18.54 -28 19 04.8 – L C51
2019-12-30 23:45:55 S 11 43 24.92 -28 22 58.5 – L C51
2019-12-31 01:19:58 S 11 43 31.342 -28 26 52.40 – L C51
2019-12-31 02:54:13 S 11 43 37.63 -28 30 46.5 – L C51
2019-12-31 04:27:44 S 11 43 43.87 -28 34 37.9 – L C51
2019-12-31 06:02:43 S 11 43 50.32 -28 38 33.7 – L C51
2019-12-31 07:36:47 S 11 43 56.66 -28 42 26.6 – L C51
2019-12-31 09:11:02 S 11 44 03.019 -28 46 21.68 – L C51
2019-12-31 10:45:17 S 11 44 09.350 -28 50 15.94 – L C51
2019-12-31 12:18:49 S 11 44 15.69 -28 54 09.3 – L C51
2019-12-31 13:53:36 S 11 44 22.09 -28 58 02.6 – L C51
2019-12-31 15:27:51 S 11 44 28.45 -29 01 59.6 – L C51
2019-12-31 18:36:21 S 11 44 41.09 -29 09 47.1 – L C51
2019-12-31 21:44:40 S 11 44 53.90 -29 17 36.0 – L C51
2020-01-01 00:53:10 S 11 45 06.47 -29 25 25.0 – L C51
2020-01-01 02:27:15 S 11 45 12.83 -29 29 19.5 – L C51
2020-01-01 04:00:46 S 11 45 19.11 -29 33 12.1 – L C51
2020-01-01 07:09:59 S 11 45 31.91 -29 41 03.7 – L C51
2020-01-01 10:18:19 S 11 45 44.635 -29 48 53.93 – L C51
2020-01-01 12:55:12 C 11 45 55.94 -29 55 35.4 – V T05
2020-01-01 12:57:12 C 11 45 56.07 -29 55 40.2 – V T05
2020-01-01 13:03:51 C 11 45 56.49 -29 55 57.1 – V T05
2020-01-01 13:26:04 S 11 45 57.29 -29 56 43.2 – L C51
2020-01-01 16:35:08 S 11 46 10.02 -30 04 35.2 – L C51
2020-01-01 19:43:38 S 11 46 22.65 -30 12 25.1 – L C51
2020-01-02 02:00:27 S 11 46 48.14 -30 28 06.2 – L C51
2020-01-02 05:08:46 S 11 47 00.763 -30 35 57.62 – L C51
2020-01-02 08:17:16 S 11 47 13.51 -30 43 48.5 – L C51
2020-01-02 11:25:35 S 11 47 26.191 -30 51 41.11 – L C51
2020-01-02 14:34:05 S 11 47 38.911 -30 59 31.81 – L C51
2020-01-02 17:42:25 S 11 47 51.61 -31 07 24.8 – L C51
2020-01-02 23:59:14 S 11 48 17.09 -31 23 08.0 – L C51
2020-01-03 13:33:51 C 11 49 12.63 -31 57 23.4 – V T08
2020-01-03 13:39:12 C 11 49 12.98 -31 57 37.1 – V T08
2020-01-03 13:49:50 C 11 49 13.67 -31 58 03.7 – V T08
2020-01-03 14:05:50 C 11 49 14.70 -31 58 44.3 – V T08
2020-01-07 14:18:04 C 11 55 45.21 -36 01 18.7 – V T08
2020-01-07 14:30:02 C 11 55 45.98 -36 01 48.6 – V T08
2020-01-07 14:34:03 C 11 55 46.24 -36 01 59.0 – V T08
2020-01-07 15:03:22 C 11 55 48.13 -36 03 13.0 – V T08
2020-01-17 20:23:05 S 12 12 43.53 -46 20 19.0 – L C51
2020-01-17 21:57:21 S 12 12 50.08 -46 24 11.4 – L C51
2020-01-17 23:31:36 S 12 12 56.777 -46 28 04.26 – L C51
2020-01-18 01:05:39 S 12 13 03.31 -46 31 58.4 – L C51
2020-01-18 01:05:51 S 12 13 03.35 -46 31 59.2 – L C51