27031 (1998 RO4)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4263352489 ± 1.08e-08
Semi-major axis (a)2.1382953708 AU ± 5.86e-10
Inclination (i)5.35636020° ± 9.58e-07
Long. of Asc. Node (Ω)191.76085314° ± 9.41e-06
Arg. of Perihelion (ω)111.91346324° ± 1.02e-05
Mean Anomaly (M)268.64042015° ± 1.21e-06
Mean Motion (n)0.3152177992°/day ± 1.30e-10
Perihelion dist (q)1.22666468 AU ± 2.31e-08
Aphelion dist (Q)3.04992606 AU ± 2.31e-08
Orbital Period3.12681037 yr ± 1.28e-09
Physical Parameters
H (abs. magnitude)17.89
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.190″
Uncertainty0
Orbit TypeAmor
MOID0.230503 AU
Observations Used906
Oppositions50
Arc Total1951-2025
First Observation Used1951-08-26
Last Observation Used2025-01-22
Observations (1000)
Date Type RA Dec Mag Band Observatory
2023-08-10 23:23:21 C 21 52 03.08 +09 21 55.6 16.3 122
2023-08-10 23:40:53 C 21 52 03.92 +09 21 47.2 16.3 122
2023-08-12 00:36:57 C 21 53 24.934 +09 09 20.70 q M16
2023-08-12 00:48:37 C 21 53 25.450 +09 09 14.47 q M16
2023-08-12 01:00:21 C 21 53 26.021 +09 09 08.35 q M16
2023-08-12 05:44:28 C 21 53 41.542 +09 07 23.20 V W68
2023-08-12 05:49:43 C 21 53 41.782 +09 07 20.35 V W68
2023-08-12 05:57:37 C 21 53 42.137 +09 07 16.32 V W68
2023-08-12 06:11:59 C 21 53 42.790 +09 07 08.65 V W68
2023-08-12 21:07:30 C 21 54 31.61 +08 58 25.6 V M31
2023-08-12 21:12:49 C 21 54 31.81 +08 58 22.3 V M31
2023-08-12 21:18:11 C 21 54 32.07 +08 58 20.0 V M31
2023-08-12 22:09:27 C 21 54 34.90 +08 57 56.9 Y 557
2023-08-12 22:36:23 C 21 54 36.05 +08 57 42.9 X G02
2023-08-12 22:42:23 C 21 54 36.33 +08 57 39.7 X G02
2023-08-12 22:48:06 C 21 54 36.59 +08 57 36.6 X G02
2023-08-12 23:10:26 C 21 54 37.74 +08 57 24.2 Y 557
2023-08-13 00:01:29 C 21 54 40.10 +08 56 56.8 Y 557
2023-08-13 01:11:48 C 21 54 43.38 +08 56 18.2 Y 557
2023-08-13 02:09:44 C 21 54 46.12 +08 55 46.3 Y 557
2023-08-13 03:05:36 C 21 54 50.85 +08 55 45.7 q X33
2023-08-13 03:10:01 C 21 54 51.06 +08 55 43.6 q X33
2023-08-13 03:14:08 C 21 54 51.26 +08 55 41.4 q X33
2023-08-13 21:42:07 C 21 55 49.34 +08 44 58.1 V 130
2023-08-13 21:44:52 C 21 55 49.46 +08 44 56.5 V 130
2023-08-13 21:48:10 C 21 55 49.62 +08 44 54.7 V 130
2023-08-13 21:49:48 C 21 55 49.69 +08 44 53.8 V 130
2023-08-13 21:59:41 C 21 55 50.09 +08 44 46.1 V G33
2023-08-13 22:07:07 C 21 55 50.46 +08 44 41.4 V G33
2023-08-13 22:13:54 C 21 55 50.585 +08 45 23.47 V M22
2023-08-13 22:16:30 C 21 55 50.698 +08 45 22.10 V M22
2023-08-13 23:07:46 C 21 55 52.922 +08 44 53.16 V M22
2023-08-13 23:44:44 C 21 55 55.08 +08 43 49.8 16.4 122
2023-08-13 23:46:16 C 21 55 54.590 +08 44 31.24 V M22
2023-08-13 23:57:49 C 21 55 55.66 +08 43 42.4 16.3 122
2023-08-14 00:13:20 C 21 55 56.35 +08 43 33.6 16.3 122
2023-08-14 07:09:41 C 21 56 18.40 +08 39 33.0 q U55
2023-08-14 07:18:21 C 21 56 18.79 +08 39 27.5 q U55
2023-08-14 07:27:02 C 21 56 19.22 +08 39 21.9 q U55
2023-08-14 21:16:50 C 21 57 02.294 +08 31 20.39 q M16
2023-08-14 21:28:16 C 21 57 02.839 +08 31 13.87 q M16
2023-08-14 21:39:46 C 21 57 03.331 +08 31 06.74 q M16
2023-08-14 23:10:12 C 21 57 07.40 +08 30 14.4 X C95
2023-08-14 23:17:12 C 21 57 07.74 +08 30 10.0 X C95
2023-08-14 23:23:21 C 21 57 08.04 +08 30 05.9 X C95
2023-08-15 06:45:25 C 21 57 29.342 +08 26 22.92 V W68
2023-08-15 06:52:47 C 21 57 29.662 +08 26 18.67 V W68
2023-08-15 07:43:09 C 21 57 31.829 +08 25 47.82 V W68
2023-08-16 02:52:48 C 21 58 31.60 +08 13 50.5 q X33
2023-08-16 02:57:12 C 21 58 31.65 +08 13 48.4 q X33