137078 (1998 XZ4)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6379071136 ± 7.58e-09
Semi-major axis (a)1.9385185544 AU ± 1.50e-09
Inclination (i)23.14653620° ± 3.85e-07
Long. of Asc. Node (Ω)324.43101836° ± 3.94e-06
Arg. of Perihelion (ω)9.64010941° ± 4.32e-06
Mean Anomaly (M)29.30107170° ± 2.11e-06
Mean Motion (n)0.3651802931°/day ± 4.24e-10
Perihelion dist (q)0.70192378 AU ± 1.47e-08
Aphelion dist (Q)3.17511333 AU ± 1.49e-08
Orbital Period2.69901279 yr ± 3.14e-09
Physical Parameters
H (abs. magnitude)16.36
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.018″
Uncertainty0
Orbit TypeApollo
MOID0.300990 AU
Observations Used845
Gaia Obs Used132
Oppositions12
Arc Total1998-2017
First Observation Used1998-12-11
Last Observation Used2026-01-08
Observations (933)
Date Type RA Dec Mag Band Observatory
1998-12-11 10:18:43 C 08 19 14.19 +66 48 38.2 18.6 a 704
1998-12-11 10:45:31 C 08 19 06.87 +66 48 34.3 18.6 a 704
1998-12-11 11:12:07 C 08 18 59.37 +66 48 32.5 18.7 a 704
1998-12-11 11:38:49 C 08 18 52.12 +66 48 30.9 18.9 a 704
1998-12-11 12:05:29 C 08 18 44.41 +66 48 29.0 18.6 a 704
1998-12-13 19:00:09 C 08 03 41.62 +66 40 41.8 327
1998-12-13 19:04:23 C 08 03 40.43 +66 40 41.0 327
1998-12-13 19:12:30 C 08 03 38.10 +66 40 39.3 17.9 327
1998-12-13 19:16:45 C 08 03 36.96 +66 40 38.3 327
1998-12-13 20:23:30 C 08 03 20.14 +66 40 16.8 046
1998-12-13 20:25:48 C 08 03 19.52 +66 40 16.4 046
1998-12-13 20:27:21 C 08 03 19.10 +66 40 15.8 046
1998-12-13 20:28:56 C 08 03 18.73 +66 40 15.4 046
1998-12-13 20:32:35 C 08 03 17.71 +66 40 14.9 046
1998-12-13 20:34:15 C 08 03 17.23 +66 40 14.5 046
1998-12-14 09:26:28 C 07 59 43.70 +66 37 22.7 z 711
1998-12-14 09:33:23 C 07 59 42.14 +66 37 21.3 z 711
1998-12-14 09:40:12 C 07 59 40.24 +66 37 19.6 z 711
1998-12-14 10:27:36 C 07 59 27.05 +66 37 07.1 18.2 a 704
1998-12-14 10:27:53 C 07 59 27.05 +66 37 02.3 658
1998-12-14 10:31:03 C 07 59 26.23 +66 37 01.9 658
1998-12-14 10:49:03 C 07 59 21.14 +66 36 57.5 658
1998-12-14 10:52:19 C 07 59 20.27 +66 36 56.4 658
1998-12-14 10:55:33 C 07 59 19.43 +66 36 55.7 658
1998-12-14 10:59:03 C 07 59 18.24 +66 36 58.7 19.3 a 704
1998-12-14 11:30:39 C 07 59 09.24 +66 36 49.5 19.9 a 704
1998-12-14 12:02:04 C 07 59 00.47 +66 36 41.8 18.8 a 704
1998-12-14 12:33:29 C 07 58 51.58 +66 36 33.1 18.6 a 704
1998-12-14 23:12:59 C 07 55 59.02 +66 33 34.4 z 587
1998-12-16 19:02:45 C 07 44 03.78 +66 18 35.6 360
1998-12-16 19:06:29 C 07 44 02.75 +66 18 33.9 360
1998-12-16 19:09:59 C 07 44 01.81 +66 18 32.5 360
1998-12-17 17:49:48 C 07 38 00.67 +66 08 38.0 540
1998-12-17 17:54:55 C 07 37 59.15 +66 08 36.9 540
1998-12-17 17:59:54 C 07 37 57.97 +66 08 33.3 540
1998-12-23 11:59:39 C 07 03 28.04 +64 42 31.5 z 402
1998-12-23 12:01:28 C 07 03 27.64 +64 42 30.2 z 402
1998-12-23 12:03:15 C 07 03 27.22 +64 42 28.8 z 402
1998-12-27 15:49:14 C 06 42 00.00 +63 15 47.8 z 402
1998-12-27 15:51:14 C 06 41 59.49 +63 15 46.1 z 402
1998-12-27 15:53:14 C 06 41 59.11 +63 15 44.5 z 402
1999-01-05 23:39:42 C 06 06 17.71 +59 15 17.3 557
1999-01-05 23:42:43 C 06 06 17.35 +59 15 13.9 557
1999-01-18 14:08:32 C 05 41 03.10 +53 24 17.4 z 402
1999-01-18 14:10:33 C 05 41 02.98 +53 24 15.1 z 402
1999-01-18 14:12:33 C 05 41 02.88 +53 24 12.5 z 402
1999-01-22 13:29:00 C 05 37 07.28 +51 39 10.3 360
1999-01-22 13:34:59 C 05 37 07.09 +51 39 03.7 360
1999-01-22 13:41:30 C 05 37 06.85 +51 38 56.5 360
2000-02-10 16:07:53 C 10 46 26.64 +00 09 28.6 413