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
2021-10-11 10:08:29 C 07 48 37.36 +55 38 30.5 V 703
2021-10-11 10:16:10 C 07 48 38.21 +55 38 31.5 V 703
2021-10-11 10:23:51 C 07 48 38.91 +55 38 29.7 V 703
2021-10-11 10:56:41 C 07 48 42.08 +55 38 26.0 U I41
2021-10-11 11:48:15 C 07 48 47.02 +55 38 20.1 U I41
2021-10-14 10:16:07 C 07 55 30.69 +55 28 58.9 U I41
2021-10-14 11:47:44 C 07 55 39.04 +55 28 47.5 U I41
2021-10-15 09:53:36 C 07 57 41.80 +55 25 41.8 V 703
2021-10-15 10:01:18 C 07 57 42.55 +55 25 41.3 V 703
2021-10-15 10:08:58 C 07 57 43.21 +55 25 39.5 V 703
2021-10-15 10:16:40 C 07 57 43.93 +55 25 38.2 V 703
2021-10-15 11:23:10 C 07 57 49.91 +55 25 29.5 U I41
2021-10-15 11:25:15 C 07 57 50.09 +55 25 29.2 U I41
2021-10-15 11:47:49 C 07 57 52.10 +55 25 26.2 U I41
2021-10-15 12:08:14 C 07 57 53.94 +55 25 23.5 U I41
2021-10-15 12:10:20 C 07 57 54.13 +55 25 23.3 U I41
2021-10-17 09:56:51 C 08 02 01.92 +55 18 44.3 U I41
2021-10-17 10:57:44 C 08 02 07.24 +55 18 36.3 U I41
2021-10-17 10:59:49 C 08 02 07.43 +55 18 36.1 U I41
2021-10-17 11:40:31 C 08 02 10.95 +55 18 30.4 U I41
2021-10-17 13:36:15 C 08 02 21.331 +55 18 13.96 U F52
2021-10-17 13:50:00 C 08 02 22.512 +55 18 12.21 U F52
2021-10-17 14:03:43 C 08 02 23.689 +55 18 10.22 U F52
2021-10-23 13:30:31 C 08 14 21.998 +54 55 39.44 U F52
2021-10-23 13:45:16 C 08 14 23.121 +54 55 37.12 U F52
2021-10-23 13:59:52 C 08 14 24.219 +54 55 35.05 U F52
2021-10-24 14:12:15 C 08 16 16.608 +54 51 33.89 U F51
2021-10-24 14:27:08 C 08 16 17.658 +54 51 31.55 U F51
2021-10-24 14:42:03 C 08 16 18.778 +54 51 29.27 U F51
2021-10-24 14:56:57 C 08 16 19.872 +54 51 26.86 U F51
2021-10-27 10:46:16 C 08 21 20.22 +54 39 50.3 V 703
2021-10-27 10:53:27 C 08 21 20.79 +54 39 49.2 V 703
2021-10-27 11:00:40 C 08 21 21.21 +54 39 47.5 V 703
2021-10-27 11:07:51 C 08 21 21.71 +54 39 47.7 V 703
2021-10-30 10:08:02 C 08 26 12.13 +54 27 12.2 V 703
2021-10-30 10:14:13 C 08 26 12.57 +54 27 10.9 U I41
2021-10-30 10:15:12 C 08 26 12.54 +54 27 11.2 V 703
2021-10-30 10:22:22 C 08 26 13.05 +54 27 10.0 V 703
2021-10-30 10:29:32 C 08 26 13.45 +54 27 08.7 V 703
2021-10-30 10:45:20 C 08 26 14.55 +54 27 05.8 U I41
2021-10-30 11:05:29 C 08 26 15.79 +54 27 02.4 U I41
2021-10-31 14:08:34 C 08 27 59.41 +54 22 11.0 V T08
2021-10-31 14:12:35 C 08 27 59.66 +54 22 09.5 V T08
2021-10-31 14:20:33 C 08 28 00.12 +54 22 08.7 V T08
2021-10-31 14:36:19 C 08 28 01.06 +54 22 06.6 V T08
2021-11-03 08:22:30 C 08 31 56.82 +54 09 50.7 U I41
2021-11-03 10:59:19 C 08 32 05.43 +54 09 24.2 U I41
2021-11-03 11:13:09 C 08 32 06.17 +54 09 21.8 U I41
2021-11-03 12:16:52 C 08 32 09.54 +54 09 10.4 U I41
2021-11-03 12:34:18 C 08 32 10.47 +54 09 07.2 U I41