285263 (1998 QE2)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5727151351 ± 2.12e-09
Semi-major axis (a)2.4206926771 AU ± 5.13e-09
Inclination (i)12.87778231° ± 6.59e-07
Long. of Asc. Node (Ω)250.07086861° ± 5.35e-07
Arg. of Perihelion (ω)345.66936702° ± 1.74e-06
Mean Anomaly (M)113.98169612° ± 3.79e-06
Mean Motion (n)0.2616994389°/day ± 8.32e-10
Perihelion dist (q)1.03432534 AU ± 5.59e-09
Aphelion dist (Q)3.80706001 AU ± 9.57e-09
Orbital Period3.76625295 yr ± 1.20e-08
Physical Parameters
H (abs. magnitude)17.28
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.291″
Uncertainty0
Orbit TypeAmor
MOID0.029660 AU
Observations Used1844
Radar Obs Used4
Oppositions11
Arc Total1998-2025
First Observation Used1998-08-19
Last Observation Used2025-11-23
Observations (1924)
Date Type RA Dec Mag Band Observatory
1998-08-27 08:02:46 C 22 36 28.67 +18 20 08.9 20.0 a 704
1998-08-27 08:53:36 C 22 36 26.04 +18 19 49.5 19.4 a 704
1998-09-09 21:54:24 C 22 20 23.30 +15 37 56.8 046
1998-09-09 21:57:10 C 22 20 23.25 +15 37 55.1 046
1998-09-09 22:01:49 C 22 20 22.97 +15 37 52.7 046
1998-09-09 22:04:22 C 22 20 22.85 +15 37 51.0 046
1998-09-12 14:01:39 C 22 17 46.02 +15 02 16.5 z 402
1998-09-12 14:03:39 C 22 17 45.91 +15 02 17.5 z 402
1998-09-12 14:05:39 C 22 17 45.82 +15 02 15.8 z 402
1998-09-15 21:05:19 C 22 14 50.79 +14 17 42.9 z 587
1998-09-15 21:21:34 C 22 14 50.17 +14 17 33.1 z 587
1998-09-15 21:52:50 C 22 14 49.03 +14 17 17.3 z 587
1998-09-16 13:42:29 C 22 14 16.44 +14 08 20.7 360
1998-09-16 13:48:30 C 22 14 16.27 +14 08 16.7 360
1998-09-16 13:56:29 C 22 14 15.93 +14 08 11.8 360
1998-09-20 18:57:48 C 22 11 09.43 +13 11 07.7 557
1998-09-20 19:02:04 C 22 11 09.27 +13 11 05.6 557
1998-09-23 07:01:55 C 22 09 35.54 +12 37 37.7 658
1998-09-23 07:11:33 C 22 09 35.26 +12 37 32.1 658
1998-09-23 07:23:51 C 22 09 35.00 +12 37 25.4 658
1998-09-23 20:55:59 C 22 09 15.86 +12 29 56.7 046
1998-09-23 20:59:01 C 22 09 15.79 +12 29 55.2 046
1998-09-23 21:02:13 C 22 09 15.74 +12 29 53.4 046
2000-12-05 08:42:26 C 05 44 01.64 +19 32 22.4 693
2000-12-05 08:45:54 C 05 44 01.48 +19 32 21.7 693
2000-12-05 08:52:16 C 05 44 01.20 +19 32 21.1 693
2000-12-20 07:19:06 C 05 27 19.12 +18 47 41.4 696
2000-12-20 07:25:12 C 05 27 18.86 +18 47 40.8 696
2002-09-03 09:22:27 C 00 32 22.08 +23 27 28.3 o 644
2002-09-03 09:25:48 C 00 32 21.94 +23 27 27.9 o 644
2002-09-03 09:37:45 C 00 32 21.42 +23 27 26.2 o 644
2002-09-03 09:41:17 C 00 32 21.26 +23 27 25.2 o 644
2002-09-03 09:54:40 C 00 32 20.62 +23 27 23.3 o 644
2002-09-03 09:58:02 C 00 32 20.52 +23 27 22.6 o 644
2002-09-06 22:35:07 C 00 28 37.88 +23 11 27.6 d 540
2002-09-06 23:04:32 C 00 28 36.53 +23 11 22.4 d 540
2002-09-08 09:23:11 C 00 27 02.65 +23 03 52.1 c 671
2002-09-08 09:28:54 C 00 27 02.38 +23 03 50.6 c 671
2002-09-11 12:15:10 C 00 23 32.39 +22 45 19.9 o 644
2002-09-11 12:29:59 C 00 23 31.66 +22 45 16.4 o 644
2002-10-03 06:27:26 C 23 58 42.16 +19 31 01.5 o 644
2007-11-13 06:26:15 C 04 07 41.27 +23 52 16.9 o 691
2007-11-13 06:51:39 C 04 07 40.10 +23 52 13.8 o 691
2007-11-13 07:17:03 C 04 07 39.21 +23 52 10.1 o 691
2008-09-28 11:19:50 C 07 35 50.45 +16 34 23.1 o 291
2008-09-28 11:27:50 C 07 35 50.74 +16 34 21.3 o 291
2008-09-28 11:35:51 C 07 35 51.16 +16 34 19.7 o 291
2008-09-29 11:50:00 C 07 36 50.60 +16 28 52.6 o 291
2008-09-29 11:55:26 C 07 36 50.94 +16 28 50.6 o 291
2008-09-29 12:01:12 C 07 36 51.03 +16 28 50.9 o 291
Radar Observations (4)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2013-06-07 05:00:00 55277706.99 1 us 2380 -1 -1
2013-06-11 06:16:00 75259618.58 1 us 2380 -1 -1
2013-06-13 05:59:00 86115379.37 1 us 2380 -1 -1
2013-06-27 06:00:00 169939823.4 2 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)