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
1951-08-26 05:21:00 19 26 01.68 -05 07 44.2 c 261
1951-08-26 06:11:00 19 26 07.51 -05 08 14.7 c 261
1951-08-26 06:17:00 19 26 08.27 -05 08 19.2 c 261
1951-08-26 06:27:00 19 26 09.43 -05 08 25.2 c 261
1995-10-17 10:57:37 C 03 35 03.81 +14 20 39.0 b 691
1995-10-17 11:32:44 C 03 35 02.15 +14 20 25.6 b 691
1995-10-17 12:07:23 C 03 35 00.51 +14 20 12.8 b 691
1998-08-23 10:08:06 C 00 34 49.83 +14 12 23.7 a 699
1998-08-23 10:42:53 C 00 34 50.39 +14 12 09.1 a 699
1998-08-23 11:18:53 C 00 34 50.98 +14 11 55.0 a 699
1998-08-27 09:33:07 C 00 36 28.26 +13 29 30.8 a 699
1998-08-27 10:19:01 C 00 36 28.53 +13 29 08.2 a 699
1998-08-27 10:54:46 C 00 36 28.81 +13 28 50.5 a 699
1998-08-28 06:21:20 C 00 36 43.48 +13 19 06.5 17.8 a 704
1998-08-28 06:34:28 C 00 36 43.45 +13 18 59.1 17.8 a 704
1998-08-28 06:47:49 C 00 36 43.68 +13 18 53.0 18.0 a 704
1998-08-28 07:01:15 C 00 36 43.71 +13 18 46.9 18.0 a 704
1998-08-28 07:14:31 C 00 36 43.80 +13 18 39.4 18.0 a 704
1998-08-28 09:30:01 C 00 36 44.53 +13 17 31.6 c 699
1998-08-28 10:05:45 C 00 36 44.67 +13 17 13.3 c 699
1998-08-28 10:55:24 C 00 36 44.95 +13 16 47.4 c 699
1998-09-14 08:32:07 C 00 34 23.04 +08 57 18.9 18.2 a 704
1998-09-14 09:04:04 C 00 34 22.25 +08 56 55.3 a 704
1998-09-14 09:35:45 C 00 34 21.56 +08 56 32.8 a 704
1998-09-15 09:37:22 C 00 33 54.42 +08 39 05.4 a 699
1998-09-15 10:13:07 C 00 33 53.57 +08 38 39.0 a 699
1998-09-15 10:48:51 C 00 33 52.69 +08 38 12.8 a 699
1998-09-18 08:57:27 C 00 32 26.67 +07 46 58.3 18.3 a 704
1998-09-18 09:15:46 C 00 32 26.18 +07 46 44.6 18.6 a 704
1998-09-18 09:35:02 C 00 32 25.69 +07 46 31.1 18.6 a 704
1998-09-18 09:54:43 C 00 32 25.23 +07 46 16.4 18.6 a 704
1998-09-18 10:14:19 C 00 32 24.66 +07 46 02.1 18.7 a 704
1998-09-20 00:14:37 C 00 31 35.13 +07 18 12.8 a 470
1998-09-20 00:23:13 C 00 31 34.89 +07 18 07.1 a 470
1998-09-20 00:34:50 C 00 31 34.59 +07 17 58.7 a 470
1998-09-20 01:59:58 C 00 31 32.36 +07 16 53.8 557
1998-09-20 02:03:20 C 00 31 32.27 +07 16 51.5 557
1998-09-20 02:06:40 C 00 31 32.20 +07 16 48.8 557
1998-09-20 03:15:46 C 00 31 30.44 +07 15 58.2 557
1998-09-23 14:20:55 C 00 29 37.19 +06 16 23.3 b 426
1998-09-23 14:39:21 C 00 29 36.71 +06 16 10.4 b 426
1998-09-23 14:59:20 C 00 29 36.13 +06 15 56.2 b 426
1998-09-23 20:35:49 C 00 29 28.91 +06 11 30.6 z 540
1998-09-23 20:43:39 C 00 29 28.70 +06 11 25.2 z 540
1998-09-23 20:50:50 C 00 29 28.50 +06 11 19.9 z 540
1998-09-25 23:47:32 C 00 28 16.94 +05 35 28.4 557
1998-09-25 23:54:54 C 00 28 16.73 +05 35 23.3 557
1998-09-26 03:21:57 C 00 28 13.02 +05 33 02.8 17.9 a 704
1998-09-26 03:45:41 C 00 28 12.38 +05 32 46.3 18.2 a 704
1998-09-26 04:09:51 C 00 28 11.72 +05 32 30.0 18.4 a 704