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
2021-12-18 09:48:16 C 08 13 49.09 +47 48 45.1 V T08
2021-12-18 09:59:36 C 08 13 47.79 +47 48 36.0 V T08
2021-12-18 10:19:40 C 08 13 45.43 +47 48 19.8 V T08
2021-12-18 10:23:43 C 08 13 44.95 +47 48 16.2 V T08
2021-12-21 15:37:04 C 08 04 26.83 +46 37 23.1 q Q21
2021-12-21 15:44:38 C 08 04 25.84 +46 37 17.1 q Q21
2021-12-26 10:55:15 C 07 48 42.13 +44 24 58.1 V T08
2021-12-26 10:57:54 C 07 48 41.74 +44 24 54.8 V T08
2021-12-26 11:01:55 C 07 48 41.11 +44 24 49.5 V T08
2021-12-26 11:09:13 C 07 48 40.03 +44 24 40.2 V T08
2021-12-26 11:14:32 C 07 48 39.22 +44 24 33.3 V T08
2021-12-26 11:17:11 C 07 48 38.83 +44 24 29.8 V T08
2021-12-26 11:28:30 C 07 48 37.11 +44 24 15.0 V T08
2021-12-26 11:37:56 C 07 48 35.68 +44 24 02.9 V T08
2021-12-31 08:43:53 S 07 31 20.410 +41 30 47.92 V C57
2021-12-31 08:43:53 s 1 +135823.19 0 -13697.686 5860.0 C57
2021-12-31 09:13:53 S 07 31 16.219 +41 30 05.15 V C57
2021-12-31 09:13:53 s 1 +137630.86 4 -10827.295 2560.0 C57
2021-12-31 10:03:53 S 07 31 09.701 +41 28 47.14 V C57
2021-12-31 10:03:53 s 1 +140528.10 9 - 6034.719 5100.0 C57
2021-12-31 10:23:53 S 07 31 06.869 +41 28 16.75 V C57
2021-12-31 10:23:53 s 1 +141647.49 8 - 4115.694 760.0 C57
2021-12-31 10:43:53 S 07 31 04.318 +41 27 49.72 V C57
2021-12-31 10:43:53 s 1 +142744.78 3 - 2196.017 690.0 C57
2021-12-31 11:23:53 S 07 30 58.709 +41 26 47.69 V C57
2021-12-31 11:23:53 s 1 +144874.28 8 + 1644.079 9090.0 C57
2021-12-31 11:53:53 S 07 30 54.631 +41 26 02.94 V C57
2021-12-31 11:53:53 s 1 +146415.69 1 + 4523.675 2160.0 C57
2021-12-31 12:03:53 S 07 30 53.494 +41 25 46.13 V C57
2021-12-31 12:03:53 s 1 +146919.07 9 + 5483.269 1590.0 C57
2021-12-31 12:13:53 S 07 30 51.910 +41 25 35.04 V C57
2021-12-31 12:13:53 s 1 +147417.32 3 + 6442.674 8840.0 C57
2021-12-31 12:33:53 S 07 30 49.337 +41 25 01.09 V C57
2021-12-31 12:33:53 s 1 +148398.52 5 + 8360.792 7470.0 C57
2021-12-31 12:43:53 S 07 30 47.796 +41 24 47.95 V C57
2021-12-31 12:43:53 s 1 +148881.55 6 + 9319.445 9190.0 C57
2021-12-31 12:53:53 S 07 30 46.361 +41 24 31.57 V C57
2021-12-31 12:53:53 s 1 +149359.58 9 +10277.788 9390.0 C57
2021-12-31 13:03:53 S 07 30 45.062 +41 24 16.85 V C57
2021-12-31 13:03:53 s 1 +149832.66 0 +11235.792 8250.0 C57
2021-12-31 13:23:53 S 07 30 42.403 +41 23 46.61 V C57
2021-12-31 13:23:53 s 1 +150764.06 0 +13150.675 2570.0 C57
2021-12-31 13:33:53 S 07 30 41.138 +41 23 32.35 V C57
2021-12-31 13:33:53 s 1 +151222.45 9 +14107.499 8350.0 C57
2021-12-31 13:43:53 S 07 30 39.530 +41 23 15.61 V C57
2021-12-31 13:43:53 s 1 +151676.03 7 +15063.876 3430.0 C57
2021-12-31 13:53:53 S 07 30 38.316 +41 22 59.88 V C57
2021-12-31 13:53:53 s 1 +152124.83 1 +16019.782 7960.0 C57
2021-12-31 14:03:53 S 07 30 36.926 +41 22 44.54 V C57
2021-12-31 14:03:53 s 1 +152568.87 3 +16975.190 2100.0 C57