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
1997-01-13 06:03:30 C 02 15 47.55 +11 56 28.9 c 566
1997-01-13 06:15:39 C 02 15 49.19 +11 55 48.0 c 566
1997-01-13 06:27:44 C 02 15 50.94 +11 55 07.1 c 566
1998-12-12 09:19:10 C 08 14 23.17 +51 36 21.2 17.5 a 704
1998-12-12 09:39:27 C 08 14 20.27 +51 35 04.6 17.8 a 704
1998-12-12 10:00:01 C 08 14 17.26 +51 33 46.2 17.8 a 704
1998-12-12 10:20:09 C 08 14 14.35 +51 32 28.9 18.2 a 704
1998-12-12 10:40:15 C 08 14 11.43 +51 31 11.4 a 704
1998-12-13 04:37:50 C 08 11 52.13 +50 19 45.7 761
1998-12-13 05:02:30 C 08 11 48.43 +50 18 08.4 761
1998-12-13 10:17:11 C 08 11 02.19 +49 56 29.9 z 711
1998-12-13 10:22:09 C 08 11 01.43 +49 56 08.9 z 711
1998-12-13 10:27:11 C 08 11 00.65 +49 55 47.8 z 711
1998-12-13 18:41:30 C 08 09 53.40 +49 20 39.5 327
1998-12-13 18:45:44 C 08 09 52.76 +49 20 21.2 16.6 327
1998-12-13 18:49:58 C 08 09 52.10 +49 20 03.0 327
1998-12-13 18:55:23 C 08 09 51.28 +49 19 39.5 327
1998-12-13 19:57:59 C 08 09 45.44 +49 14 42.0 046
1998-12-13 19:59:39 C 08 09 45.41 +49 14 35.0 046
1998-12-13 20:01:19 C 08 09 45.07 +49 14 28.1 046
1998-12-13 20:04:36 C 08 09 44.78 +49 14 13.7 046
1998-12-13 20:05:28 C 08 09 44.48 +49 14 10.1 046
1998-12-13 22:40:53 C 08 09 22.04 +49 03 07.0 i 106
1998-12-13 22:49:03 C 08 09 20.82 +49 02 31.9 i 106
1998-12-13 22:59:20 C 08 09 19.32 +49 01 46.7 i 106
1998-12-13 23:11:30 C 08 09 17.50 +49 00 54.7 i 106
1998-12-13 23:18:29 C 08 09 16.46 +49 00 24.4 i 106
1998-12-13 23:27:09 C 08 09 15.07 +48 59 46.7 i 106
1998-12-14 09:46:10 C 08 07 46.61 +48 13 38.4 658
1998-12-14 09:46:44 C 08 07 45.50 +48 13 50.1 z 711
1998-12-14 09:48:23 C 08 07 46.27 +48 13 28.5 658
1998-12-14 09:51:23 C 08 07 45.82 +48 13 14.6 658
1998-12-14 09:52:05 C 08 07 44.65 +48 13 25.7 z 711
1998-12-14 09:57:12 C 08 07 43.99 +48 13 04.6 z 711
1998-12-14 10:27:51 C 08 07 39.25 +48 10 37.6 19.1 a 704
1998-12-14 10:59:18 C 08 07 34.07 +48 08 16.0 a 704
1998-12-14 11:30:52 C 08 07 29.18 +48 05 48.7 a 704
1998-12-14 12:02:19 C 08 07 24.28 +48 03 23.0 18.1 a 704
1998-12-14 12:33:44 C 08 07 19.34 +48 00 56.6 a 704
1998-12-14 23:36:44 C 08 05 47.51 +47 08 50.0 z 151
1998-12-14 23:42:04 C 08 05 46.75 +47 08 25.8 z 151
1998-12-14 23:46:57 C 08 05 45.96 +47 08 02.4 z 151
1998-12-14 23:52:24 C 08 05 45.08 +47 07 36.0 z 151
1998-12-15 18:41:47 C 08 02 58.61 +45 33 36.0 z 151
1998-12-15 18:46:03 C 08 02 57.92 +45 33 14.8 z 151
1998-12-15 18:52:54 C 08 02 56.99 +45 32 39.9 z 151
1998-12-15 18:55:47 C 08 02 56.40 +45 32 26.7 z 151
1998-12-15 20:32:28 C 08 02 42.06 +45 24 18.8 540
1998-12-15 20:34:39 C 08 02 41.27 +45 24 07.0 540
1998-12-15 20:36:38 C 08 02 41.43 +45 23 58.1 540