356991 (1998 QA1)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5342592316 ± 5.91e-08
Semi-major axis (a)2.1018872400 AU ± 3.24e-08
Inclination (i)8.19293884° ± 1.22e-05
Long. of Asc. Node (Ω)298.84659667° ± 7.09e-05
Arg. of Perihelion (ω)333.18255171° ± 6.78e-05
Mean Anomaly (M)353.18827135° ± 7.09e-05
Mean Motion (n)0.3234432972°/day ± 7.48e-09
Perihelion dist (q)0.97893458 AU ± 1.25e-07
Aphelion dist (Q)3.22483990 AU ± 1.34e-07
Orbital Period3.04729234 yr ± 7.05e-08
Physical Parameters
H (abs. magnitude)19.07
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.481″
Uncertainty0
Orbit TypeApollo
MOID0.000401 AU
Observations Used201
Oppositions17
Arc Total1998-2023
First Observation Used1998-08-19
Last Observation Used2023-11-19
Observations (202)
Date Type RA Dec Mag Band Observatory
1998-08-19 09:04:07 C 22 54 01.21 +20 57 20.2 18.3 a 704
1998-08-19 09:21:19 C 22 53 59.90 +20 57 15.5 18.7 a 704
1998-08-19 09:39:32 C 22 53 58.51 +20 57 09.7 18.6 a 704
1998-08-19 09:57:56 C 22 53 57.13 +20 57 03.9 18.1 a 704
1998-08-19 10:16:03 C 22 53 55.84 +20 56 58.2 18.2 a 704
1998-08-19 19:47:22 C 22 53 22.76 +20 54 04.1 557
1998-08-19 20:08:45 C 22 53 21.55 +20 54 03.5 z 596
1998-08-19 20:08:50 C 22 53 21.31 +20 53 58.5 557
1998-08-19 20:23:35 C 22 53 20.57 +20 53 59.2 z 596
1998-08-19 20:38:24 C 22 53 19.51 +20 53 55.0 z 596
1998-08-19 20:39:29 C 22 53 19.34 +20 53 50.5 b 611
1998-08-19 20:46:20 C 22 53 18.83 +20 53 48.7 b 611
1998-08-19 21:11:00 C 22 53 17.21 +20 53 42.7 b 611
1998-08-20 00:10:29 C 22 53 04.86 +20 53 02.0 z 620
1998-08-20 00:34:29 C 22 53 03.11 +20 52 54.3 z 620
1998-08-20 00:55:09 C 22 53 01.20 +20 52 41.7 046
1998-08-20 00:57:48 C 22 53 01.02 +20 52 40.9 046
1998-08-20 01:00:41 C 22 53 00.82 +20 52 40.0 046
1998-08-20 01:03:33 C 22 53 00.61 +20 52 39.1 046
1998-08-20 01:14:09 C 22 53 00.22 +20 52 42.6 z 620
1998-08-20 02:46:33 C 22 52 56.94 +20 52 08.1 z 734
1998-08-20 02:51:29 C 22 52 56.58 +20 52 06.9 z 734
1998-08-20 02:57:15 C 22 52 56.19 +20 52 05.0 z 734
1998-08-20 08:06:14 C 22 52 35.46 +20 50 44.2 z 670
1998-08-20 08:20:30 C 22 52 34.34 +20 50 40.6 z 670
1998-08-20 08:43:15 C 22 52 32.78 +20 50 33.7 z 670
1998-08-20 09:00:14 C 22 52 31.48 +20 50 27.8 z 670
1998-08-20 15:11:00 C 22 52 09.24 +20 48 34.8 z 402
1998-08-20 15:12:31 C 22 52 09.12 +20 48 34.3 z 402
1998-08-20 15:14:01 C 22 52 09.00 +20 48 33.9 z 402
1998-08-20 15:15:32 C 22 52 08.90 +20 48 33.6 z 402
1998-08-20 19:27:50 C 22 51 55.17 +20 47 01.8 z 104
1998-08-20 19:33:19 C 22 51 54.85 +20 47 00.5 z 104
1998-08-20 19:39:24 C 22 51 54.44 +20 46 58.9 z 104
1998-08-20 19:43:59 C 22 51 54.14 +20 46 58.0 z 104
1998-08-20 19:58:23 C 22 51 53.26 +20 46 54.8 z 108
1998-08-20 20:04:28 C 22 51 52.86 +20 46 52.3 z 108
1998-08-20 20:21:18 C 22 51 51.65 +20 46 47.8 z 108
1998-08-20 20:32:42 C 22 51 50.98 +20 46 43.4 z 108
1998-08-20 21:59:31 C 22 51 44.86 +20 46 16.9 557
1998-08-20 22:03:24 C 22 51 44.63 +20 46 16.0 557
1998-08-20 22:07:08 C 22 51 44.31 +20 46 15.0 557
1998-08-20 22:12:14 C 22 51 44.30 +20 46 15.0 z 587
1998-08-20 22:20:29 C 22 51 43.78 +20 46 13.5 z 587
1998-08-21 05:19:00 C 22 51 18.98 +20 44 02.5 b 713
1998-08-21 05:46:00 C 22 51 17.12 +20 43 54.9 b 713
1998-08-21 06:11:00 C 22 51 15.43 +20 43 47.0 b 713
1998-08-21 22:50:20 C 22 50 16.25 +20 38 12.2 17.1 143
1998-08-21 22:55:58 C 22 50 15.85 +20 38 10.1 17.2 143
1998-08-21 23:01:38 C 22 50 15.50 +20 38 08.7 17.1 143