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
1998-09-26 04:33:41 C 00 28 11.14 +05 32 13.8 18.0 a 704
1998-09-26 04:57:37 C 00 28 10.53 +05 31 56.9 18.1 a 704
1998-09-27 07:04:05 C 00 27 34.09 +05 14 00.2 18.4 a 704
1998-09-27 07:29:17 C 00 27 33.37 +05 13 42.7 a 704
1998-09-27 07:55:11 C 00 27 32.67 +05 13 25.5 18.7 a 704
1998-09-27 08:20:17 C 00 27 31.99 +05 13 07.3 18.9 a 704
1998-09-27 08:46:04 C 00 27 31.28 +05 12 49.4 19.0 a 704
1998-10-02 13:01:11 C 00 24 50.59 +03 51 48.4 z 402
1998-10-02 13:03:12 C 00 24 50.53 +03 51 47.4 z 402
1998-10-02 13:05:11 C 00 24 50.50 +03 51 45.6 z 402
1998-10-02 16:11:00 C 00 24 45.98 +03 49 52.2 360
1998-10-02 16:14:59 C 00 24 45.90 +03 49 49.2 360
1998-10-02 16:20:00 C 00 24 45.77 +03 49 46.4 360
1998-10-12 21:31:53 C 00 20 51.60 +01 38 17.4 a 470
1998-10-12 21:42:22 C 00 20 51.55 +01 38 12.5 a 470
1998-10-13 15:45:44 C 00 20 39.49 +01 30 32.9 422
1998-10-13 15:48:08 C 00 20 39.47 +01 30 31.9 422
1998-10-13 22:21:16 C 00 20 36.06 +01 27 21.4 557
1998-10-13 22:34:32 C 00 20 35.93 +01 27 16.4 046
1998-10-13 22:37:23 C 00 20 35.89 +01 27 15.0 046
1998-10-14 05:21:50 C 00 20 32.23 +01 24 25.6 a 699
1998-10-14 05:57:34 C 00 20 31.81 +01 24 09.0 a 699
1998-10-14 06:33:22 C 00 20 31.35 +01 23 53.4 a 699
1998-10-14 20:57:26 C 00 20 23.64 +01 17 50.8 a 470
1998-10-14 21:09:11 C 00 20 23.51 +01 17 46.4 a 470
1998-10-14 21:29:00 C 00 20 23.35 +01 17 37.9 a 470
1998-10-15 04:47:08 C 00 20 19.74 +01 14 38.1 18.8 a 704
1998-10-15 05:42:37 C 00 20 19.04 +01 14 17.1 19.1 a 704
1998-10-15 06:10:17 C 00 20 18.72 +01 14 06.8 19.1 a 704
1998-10-15 06:38:02 C 00 20 18.21 +01 13 53.5 19.5 a 704
1998-10-19 06:11:02 C 00 19 44.23 +00 38 27.4 a 699
1998-10-19 06:46:48 C 00 19 44.02 +00 38 16.7 a 699
1998-10-19 07:22:33 C 00 19 43.77 +00 38 03.0 a 699
1998-11-15 04:46:24 C 00 27 57.87 -00 36 57.1 z 711
1998-11-15 05:05:29 C 00 27 58.35 -00 36 55.8 z 711
1998-11-16 04:50:28 C 00 28 38.20 -00 35 11.5 z 711
1998-11-16 05:09:42 C 00 28 38.72 -00 35 10.2 z 711
2001-04-05 14:53:52 C 15 12 57.33 -14 09 00.7 413
2001-04-05 14:59:47 C 15 12 57.33 -14 08 59.4 413
2001-04-05 15:04:23 C 15 12 57.35 -14 08 57.8 413
2001-04-06 14:35:51 C 15 12 59.61 -14 02 16.5 413
2001-04-06 14:40:29 C 15 12 59.62 -14 02 15.3 413
2001-04-06 14:45:04 C 15 12 59.61 -14 02 13.5 413
2001-04-18 09:45:46 C 15 10 41.06 -12 21 35.3 d 691
2001-04-18 10:16:51 C 15 10 40.45 -12 21 21.9 d 691
2001-04-18 10:47:38 C 15 10 39.79 -12 21 08.8 d 691
2001-04-25 14:00:49 C 15 06 47.43 -11 02 19.2 V 608
2001-04-25 14:16:41 C 15 06 46.94 -11 02 11.2 V 608
2001-05-12 23:00:34 C 14 51 36.37 -07 13 45.9 118
2001-05-12 23:02:08 C 14 51 36.30 -07 13 44.5 118