IAA RAS IAA Minor Planet Database

85839 (1998 YO4)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2481006912 ± 1.24e-08
Semi-major axis (a)1.6534926704 AU ± 9.96e-10
Inclination (i)9.31939239° ± 8.81e-07
Long. of Asc. Node (Ω)28.50072273° ± 2.80e-06
Arg. of Perihelion (ω)199.69071851° ± 2.99e-06
Mean Anomaly (M)97.04138343° ± 2.26e-06
Mean Motion (n)0.4635631070°/day ± 4.19e-10
Perihelion dist (q)1.24326000 AU ± 2.05e-08
Aphelion dist (Q)2.06372534 AU ± 2.05e-08
Orbital Period2.12619656 yr ± 1.92e-09
Physical Parameters
H (abs. magnitude)16.58
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.072″
Uncertainty0
Orbit TypeAmor
MOID0.239954 AU
Observations Used2510
Gaia Obs Used50
Oppositions12
Arc Total1993-2025
First Observation Used1993-04-25
Last Observation Used2025-11-08
Observations (3041)
Date Type RA Dec Mag Band Observatory
2021-09-24 06:43:57 s 1 -94209.084 0 +342318.42 5010.0 – C57
2021-09-24 08:23:57 S 00 41 10.853 -04 23 10.28 – V C57
2021-09-24 08:23:57 s 1 -97631.550 0 +339782.54 2330.0 – C57
2021-09-24 08:33:57 S 00 41 10.464 -04 23 17.41 – V C57
2021-09-24 08:33:57 s 1 -97972.108 0 +339522.90 5080.0 – C57
2021-09-24 08:53:57 S 00 41 09.041 -04 23 12.26 – V C57
2021-09-24 08:53:57 s 1 -98652.284 0 +339000.31 7250.0 – C57
2021-09-24 09:06:45 C 00 41 44.82 -04 22 33.9 – V T05
2021-09-24 09:12:05 C 00 41 44.41 -04 22 35.1 – V T05
2021-09-24 09:22:39 C 00 41 43.70 -04 22 34.8 – V T05
2021-09-24 09:39:21 C 00 41 42.56 -04 22 38.3 – V T05
2021-09-25 10:23:45 C 00 40 03.659 -04 25 46.74 – U F51
2021-09-25 10:41:02 C 00 40 02.460 -04 25 48.90 – U F51
2021-09-25 10:58:21 C 00 40 01.260 -04 25 51.05 – U F51
2021-09-25 11:15:40 C 00 40 00.061 -04 25 53.23 – U F51
2021-09-27 10:57:10 C 00 36 49.09 -04 31 35.1 – V T08
2021-09-27 11:01:09 C 00 36 48.76 -04 31 36.2 – V T08
2021-09-27 11:49:13 C 00 36 45.44 -04 31 41.6 – V T08
2021-09-27 11:58:32 C 00 36 44.80 -04 31 42.3 – V T08
2021-09-29 09:17:34 C 00 33 43.91 -04 36 39.8 – V T05
2021-09-29 09:20:13 C 00 33 43.72 -04 36 39.9 – V T05
2021-09-29 09:24:12 C 00 33 43.41 -04 36 40.2 – V T05
2021-09-29 10:05:15 C 00 33 40.60 -04 36 44.6 – V T05
2021-09-29 11:06:50 C 00 33 36.350 -04 36 51.02 – U F51
2021-09-29 11:22:57 C 00 33 35.235 -04 36 52.69 – U F51
2021-09-29 11:39:04 C 00 33 34.121 -04 36 54.33 – U F51
2021-09-29 11:55:12 C 00 33 33.011 -04 36 55.97 – U F51
2021-09-29 16:40:51 C 00 33 14.16 -04 37 27.0 – V D29
2021-09-29 17:01:13 C 00 33 12.75 -04 37 29.2 – V D29
2021-09-29 17:21:34 C 00 33 11.36 -04 37 31.1 – V D29
2021-09-30 01:13:57 S 00 32 44.842 -04 37 25.00 – V C57
2021-09-30 01:13:57 s 1 +130241.64 2 -23606.745 2630.0 – C57
2021-09-30 02:23:57 S 00 32 39.422 -04 37 29.71 – V C57
2021-09-30 02:23:57 s 1 +134920.19 5 -16842.698 3230.0 – C57
2021-09-30 03:13:57 S 00 32 35.381 -04 37 33.17 – V C57
2021-09-30 03:13:57 s 1 +138062.87 6 -11985.313 6190.0 – C57
2021-09-30 05:33:57 S 00 32 25.171 -04 37 49.58 – V C57
2021-09-30 05:33:57 s 1 +146031.73 4 + 1669.874 7220.0 – C57
2021-09-30 05:43:57 S 00 32 24.463 -04 37 42.35 – V C57
2021-09-30 05:43:57 s 1 +146556.31 1 + 2646.054 3110.0 – C57
2021-09-30 06:03:57 S 00 32 22.286 -04 37 46.67 – V C57
2021-09-30 06:03:57 s 1 +147588.34 9 + 4598.058 8530.0 – C57
2021-09-30 06:43:57 S 00 32 19.534 -04 37 48.47 – V C57
2021-09-30 06:43:57 s 1 +149585.13 4 + 8499.640 7860.0 – C57
2021-09-30 08:03:57 S 00 32 13.750 -04 37 54.70 – V C57
2021-09-30 08:03:57 s 1 +153318.71 9 +16285.763 1150.0 – C57
2021-09-30 08:33:38 C 00 32 11.276 -04 39 00.48 – U F51
2021-09-30 08:55:00 C 00 32 09.804 -04 39 02.62 – U F51
2021-09-30 09:17:44 C 00 32 08.242 -04 39 04.85 – U F51
2021-09-30 09:40:50 C 00 32 06.652 -04 39 07.15 – U F51