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
2020-01-18 02:39:54 S 12 13 10.04 -46 35 52.2 – L C51
2020-01-18 04:14:10 S 12 13 16.79 -46 39 46.4 – L C51
2020-01-18 05:48:25 S 12 13 23.34 -46 43 39.4 – L C51
2020-01-18 10:30:59 S 12 13 43.33 -46 55 19.0 – L C51
2020-01-18 13:39:18 S 12 13 56.60 -47 03 05.1 – L C51
2020-01-18 16:47:48 S 12 14 09.994 -47 10 51.64 – L C51
2020-01-18 19:56:07 S 12 14 23.30 -47 18 36.9 – L C51
2020-01-18 23:04:37 S 12 14 36.64 -47 26 22.9 – L C51
2020-01-19 02:12:56 S 12 14 50.035 -47 34 06.92 – L C51
2020-01-19 05:20:43 S 12 15 03.29 -47 41 51.8 – L C51
2020-01-19 08:29:45 S 12 15 16.632 -47 49 36.01 – L C51
2020-01-19 11:38:04 S 12 15 30.34 -47 57 20.3 – L C51
2020-01-19 11:38:15 S 12 15 30.23 -47 57 20.7 – L C51
2020-01-19 14:46:34 S 12 15 43.59 -48 05 04.7 – L C51
2020-01-19 17:54:54 S 12 15 56.94 -48 12 48.1 – L C51
2020-01-19 21:03:23 S 12 16 10.39 -48 20 31.0 – L C51
2020-01-20 00:11:43 S 12 16 23.80 -48 28 15.8 – L C51
2020-01-20 03:19:28 S 12 16 37.25 -48 35 55.5 – L C51
2020-01-20 06:28:32 S 12 16 50.662 -48 43 39.25 – L C51
2020-01-20 09:37:02 S 12 17 04.19 -48 51 21.3 – L C51
2020-01-20 12:44:37 S 12 17 17.53 -48 59 01.8 – L C51
2020-01-20 15:53:51 S 12 17 31.171 -49 06 44.28 – L C51
2020-01-20 19:02:10 S 12 17 44.77 -49 14 23.7 – L C51
2020-01-20 22:10:29 S 12 17 58.17 -49 22 04.2 – L C51
2020-01-21 01:18:59 S 12 18 11.69 -49 29 45.5 – L C51
2020-01-21 04:26:34 S 12 18 25.12 -49 37 23.4 – L C51
2020-01-21 07:35:49 S 12 18 38.76 -49 45 03.8 – L C51
2020-01-21 13:51:54 S 12 19 05.77 -50 00 20.4 – L C51
2020-01-21 17:00:56 S 12 19 19.41 -50 08 00.6 – L C51
2020-01-21 20:09:16 S 12 19 33.02 -50 15 38.3 – L C51
2020-01-21 23:17:45 S 12 19 46.64 -50 23 15.0 – L C51
2020-01-22 05:33:50 S 12 20 13.78 -50 38 27.9 – L C51
2020-01-22 11:51:24 S 12 20 41.08 -50 53 42.6 – L C51
2020-01-22 14:59:43 S 12 20 54.86 -51 01 16.2 – L C51
2020-01-22 18:08:13 S 12 21 08.50 -51 08 52.1 – L C51
2020-01-23 00:24:51 S 12 21 35.837 -51 24 01.94 – L C51
2020-01-23 03:33:21 S 12 21 49.613 -51 31 34.28 – L C51
2020-02-08 21:26:49 S 12 54 03.528 -66 24 56.23 – L C51
2020-02-09 06:51:57 S 12 54 55.397 -66 43 44.65 – L C51
2020-02-09 16:17:06 S 12 55 47.928 -67 02 29.62 – L C51
2020-02-09 22:33:55 S 12 56 23.110 -67 14 54.28 – L C51
2020-02-10 01:42:14 S 12 56 40.774 -67 21 06.48 – L C51
2020-02-10 14:15:52 S 12 57 52.12 -67 45 45.8 – L C51
2020-02-10 23:41:00 S 12 58 46.18 -68 04 08.7 – L C51
2020-02-11 02:49:19 S 12 59 04.39 -68 10 13.5 – L C51
2020-02-11 15:22:46 S 13 00 17.54 -68 34 31.1 – L C51
2020-02-11 15:22:58 S 13 00 17.61 -68 34 31.4 – L C51
2020-02-11 18:31:17 S 13 00 35.95 -68 40 33.9 – L C51
2020-02-11 21:39:35 S 13 00 54.36 -68 46 35.0 – L C51
2020-02-12 00:48:06 S 13 01 13.020 -68 52 34.79 – L C51