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
1998-08-29 08:23:22 C 22 41 19.23 +19 24 36.8 658
1998-08-29 08:27:30 C 22 41 19.04 +19 24 35.2 658
1998-08-31 20:01:01 C 22 38 56.42 +18 55 20.9 046
1998-08-31 20:02:54 C 22 38 56.38 +18 55 20.3 046
1998-08-31 20:04:33 C 22 38 56.27 +18 55 19.5 046
1998-08-31 20:06:05 C 22 38 56.22 +18 55 19.2 046
1998-09-01 16:42:29 C 22 38 08.84 +18 44 59.4 360
1998-09-01 16:52:00 C 22 38 08.42 +18 44 54.4 360
1998-09-01 16:58:29 C 22 38 08.12 +18 44 51.3 360
1998-09-02 04:56:05 C 22 37 42.60 +18 39 09.3 z 860
1998-09-02 05:07:34 C 22 37 42.02 +18 39 03.7 z 860
1998-09-02 05:15:16 C 22 37 41.64 +18 38 58.0 z 860
1998-09-03 12:55:56 C 22 36 39.43 +18 22 00.2 z 402
1998-09-03 12:57:56 C 22 36 39.34 +18 21 59.1 z 402
1998-09-03 12:59:56 C 22 36 39.26 +18 21 58.1 z 402
1998-09-04 19:24:25 C 22 35 42.47 +18 05 43.2 118
1998-09-04 19:29:38 C 22 35 42.31 +18 05 39.8 118
1998-09-08 15:09:10 C 22 33 14.95 +17 16 03.2 z 402
1998-09-08 15:11:40 C 22 33 14.92 +17 16 01.8 z 402
1998-09-08 15:14:11 C 22 33 14.82 +17 16 00.3 z 402
1998-09-09 22:10:05 C 22 32 34.49 +16 58 54.2 046
1998-09-09 22:13:09 C 22 32 34.40 +16 58 52.6 046
1998-09-09 22:16:25 C 22 32 34.34 +16 58 51.0 046
1998-09-09 22:19:18 C 22 32 34.25 +16 58 49.4 046
1998-09-14 21:05:47 C 22 30 36.83 +15 53 21.1 z 587
1998-09-14 21:31:54 C 22 30 36.36 +15 53 07.9 z 587
1998-09-20 20:07:17 C 22 29 33.87 +14 36 23.2 118
1998-09-20 20:18:04 C 22 29 33.74 +14 36 17.4 118
1998-09-22 09:02:43 C 22 29 30.27 +14 17 11.8 658
1998-09-22 09:09:25 C 22 29 30.22 +14 17 08.5 658
1998-09-23 21:16:31 C 22 29 33.62 +13 58 48.4 z 587
1998-09-23 21:29:44 C 22 29 33.48 +13 58 40.3 z 587
1998-09-23 21:36:08 C 22 29 33.47 +13 58 36.8 046
1998-09-23 21:39:21 C 22 29 33.44 +13 58 35.2 046
1998-09-23 21:42:14 C 22 29 33.44 +13 58 34.0 046
1998-09-23 21:45:30 C 22 29 33.43 +13 58 32.0 046
1998-09-27 20:55:15 C 22 30 04.48 +13 12 06.9 557
1998-09-27 21:05:30 C 22 30 04.53 +13 12 02.9 557
1998-10-13 20:31:10 C 22 37 12.22 +10 41 29.1 557
1998-10-13 20:40:00 C 22 37 12.44 +10 41 26.1 557
1998-10-27 06:49:39 C 22 48 05.60 +09 23 42.0 658
1998-10-27 06:55:03 C 22 48 05.77 +09 23 40.2 658
1998-10-27 07:06:53 C 22 48 06.13 +09 23 38.8 658
1998-10-27 07:13:14 C 22 48 06.49 +09 23 37.5 658
1998-11-16 03:34:18 C 23 09 45.71 +08 44 18.6 z 711
1998-11-16 03:53:21 C 23 09 46.69 +08 44 18.3 z 711
1998-11-17 03:57:48 C 23 11 00.03 +08 44 22.2 z 711
2001-03-02 08:11:07 C 11 03 56.96 -08 28 52.9 d 691
2001-03-02 08:21:31 C 11 03 56.26 -08 28 53.8 d 691
2001-03-02 08:32:27 C 11 03 55.56 -08 28 55.7 d 691