439854 (1998 XA5)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3071831048 ± 7.74e-08
Semi-major axis (a)1.5583005808 AU ± 1.75e-08
Inclination (i)31.75771298° ± 1.66e-05
Long. of Asc. Node (Ω)274.15237535° ± 4.16e-06
Arg. of Perihelion (ω)211.32659630° ± 4.73e-05
Mean Anomaly (M)283.37460518° ± 1.06e-04
Mean Motion (n)0.5066819431°/day ± 8.55e-09
Perihelion dist (q)1.07961697 AU ± 1.21e-07
Aphelion dist (Q)2.03698419 AU ± 1.23e-07
Orbital Period1.94525638 yr ± 3.28e-08
Physical Parameters
H (abs. magnitude)18.73
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.597″
Uncertainty0
Orbit TypeAmor
MOID0.130179 AU
Observations Used257
Oppositions13
Arc Total1997-2023
First Observation Used1997-01-13
Last Observation Used2023-07-15
Observations (266)
Date Type RA Dec Mag Band Observatory
1999-01-01 01:46:31 C 06 55 06.77 -11 11 31.6 z 860
1999-01-01 02:09:05 C 06 55 02.54 -11 15 07.7 z 860
1999-01-01 02:26:26 C 06 54 59.24 -11 17 54.1 z 860
1999-01-04 11:08:39 C 06 41 30.21 -22 49 14.0 422
1999-01-04 11:09:23 C 06 41 30.08 -22 49 19.2 422
1999-01-04 11:10:13 C 06 41 29.94 -22 49 25.3 422
1999-01-04 21:49:07 C 06 39 45.97 -24 10 23.2 z 587
1999-01-04 21:51:41 C 06 39 45.43 -24 10 45.4 z 587
1999-01-05 22:08:36 C 06 35 55.00 -27 02 56.4 z 587
1999-01-05 22:14:40 C 06 35 53.96 -27 03 38.0 z 587
1999-01-07 11:21:17 C 06 30 14.67 -30 59 56.1 z 428
1999-01-07 11:34:01 C 06 30 12.59 -31 01 12.3 z 428
1999-01-07 11:36:28 C 06 30 12.20 -31 01 27.4 z 428
1999-01-08 12:47:51 C 06 26 28.42 -33 25 33.8 z 428
1999-01-08 12:51:52 C 06 26 27.84 -33 25 53.1 z 428
1999-01-08 12:57:46 C 06 26 26.84 -33 26 27.6 z 428
1999-01-08 13:02:45 C 06 26 26.02 -33 26 55.0 z 428
1999-01-08 13:08:40 C 06 26 25.10 -33 27 26.9 z 428
1999-01-10 12:36:50 C 06 19 45.73 -37 25 12.1 422
1999-01-10 12:37:41 C 06 19 45.58 -37 25 16.0 422
1999-01-10 12:40:22 C 06 19 45.19 -37 25 28.6 422
1999-01-10 15:40:29 C 06 19 18.27 -37 39 05.6 z 428
1999-01-10 15:51:15 C 06 19 16.67 -37 39 53.7 z 428
1999-01-10 16:12:30 C 06 19 13.61 -37 41 28.3 z 428
1999-01-10 16:16:00 C 06 19 13.14 -37 41 43.3 z 428
1999-01-10 16:19:10 C 06 19 12.69 -37 41 57.3 z 428
1999-01-11 15:08:09 C 06 16 11.50 -39 21 00.8 z 428
1999-01-11 15:13:15 C 06 16 10.78 -39 21 21.9 z 428
1999-01-12 11:31:10 C 06 13 37.26 -40 42 40.8 422
1999-01-13 12:02:59 C 06 10 34.04 -42 13 13.1 z 428
1999-01-13 12:05:30 C 06 10 33.74 -42 13 21.9 z 428
1999-01-13 12:17:55 C 06 10 32.00 -42 14 06.6 z 428
1999-01-15 13:21:52 C 06 04 47.97 -44 52 24.6 z 428
1999-01-16 12:12:16 C 06 02 19.34 -45 57 07.2 z 428
1999-01-16 12:17:04 C 06 02 18.73 -45 57 20.9 z 428
1999-01-16 12:22:44 C 06 02 18.02 -45 57 35.8 z 428
1999-01-18 13:07:20 C 05 57 19.35 -47 59 20.1 z 428
1999-01-19 13:59:02 C 05 54 57.66 -48 53 57.2 z 428
1999-01-19 14:37:13 C 05 54 53.80 -48 55 15.2 z 428
1999-01-19 14:49:10 C 05 54 52.53 -48 55 39.3 z 428
1999-01-26 10:41:51 C 05 42 25.40 -53 22 18.4 z 428
1999-01-26 10:52:24 C 05 42 24.70 -53 22 31.2 z 428
1999-02-06 10:23:13 C 05 31 40.65 -57 11 40.0 z 428
1999-02-06 10:42:08 C 05 31 40.03 -57 11 50.9 z 428
1999-02-06 11:05:01 C 05 31 39.28 -57 12 05.3 z 428
1999-02-13 09:55:27 C 05 29 48.52 -58 31 06.5 z 428
1999-02-14 11:25:35 C 05 29 48.98 -58 40 20.3 z 428
1999-02-14 12:05:35 C 05 29 48.77 -58 40 31.3 z 428
1999-04-13 11:54:44 C 07 23 06.99 -59 12 52.8 422
1999-04-13 11:57:03 C 07 23 07.32 -59 12 51.6 422