172974 (2005 YW55)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2464808739 ± 3.21e-08
Semi-major axis (a)1.6370166952 AU ± 4.04e-09
Inclination (i)8.47291926° ± 4.96e-06
Long. of Asc. Node (Ω)239.35197615° ± 2.23e-05
Arg. of Perihelion (ω)256.74539085° ± 2.74e-05
Mean Anomaly (M)162.84422405° ± 2.05e-05
Mean Motion (n)0.4705790766°/day ± 1.74e-09
Perihelion dist (q)1.23352339 AU ± 5.27e-08
Aphelion dist (Q)2.04051000 AU ± 5.28e-08
Orbital Period2.09449662 yr ± 7.75e-09
Physical Parameters
H (abs. magnitude)19.40
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.399″
Uncertainty0
Orbit TypeAmor
MOID0.293200 AU
Observations Used220
Oppositions12
Arc Total2002-2025
First Observation Used2002-06-04
Last Observation Used2025-06-22
Observations (226)
Date Type RA Dec Mag Band Observatory
2005-12-29 07:52:18 C 08 57 37.61 -06 22 02.5 r 703
2005-12-29 08:15:56 C 08 57 38.24 -06 22 34.5 c 651
2005-12-29 08:17:45 C 08 57 38.28 -06 22 37.2 c 651
2005-12-29 08:19:34 C 08 57 38.37 -06 22 39.6 c 651
2005-12-29 09:32:24 C 08 57 39.68 -06 24 24.3 r 734
2005-12-29 09:32:59 C 08 57 40.05 -06 24 23.1 c 701
2005-12-29 09:35:59 C 08 57 40.27 -06 24 27.7 c 673
2005-12-29 09:36:38 C 08 57 39.81 -06 24 30.4 r 734
2005-12-29 09:39:19 C 08 57 40.36 -06 24 32.7 c 673
2005-12-29 09:40:52 C 08 57 39.89 -06 24 36.4 r 734
2005-12-29 09:51:07 C 08 57 40.33 -06 24 47.6 c 711
2005-12-29 09:51:20 C 08 57 40.66 -06 24 49.3 c 673
2005-12-29 09:57:29 C 08 57 40.78 -06 24 58.0 c 673
2005-12-29 09:58:13 C 08 57 40.50 -06 24 57.6 c 711
2005-12-29 10:02:59 C 08 57 40.76 -06 25 04.5 c 701
2005-12-29 10:08:50 C 08 57 40.76 -06 25 13.3 c 711
2005-12-29 10:32:58 C 08 57 41.48 -06 25 46.9 c 701
2006-01-02 09:30:22 C 09 00 10.96 -08 37 02.4 c 711
2006-01-02 09:37:25 C 09 00 11.08 -08 37 12.2 c 711
2006-01-02 09:44:28 C 09 00 11.20 -08 37 21.7 c 711
2006-01-07 06:17:38 C 09 02 23.59 -11 13 28.8 r 448
2006-01-07 06:23:17 C 09 02 23.67 -11 13 35.9 r 448
2006-01-07 06:28:56 C 09 02 23.67 -11 13 43.7 r 448
2006-01-09 15:18:56 C 09 03 06.84 -12 26 26.1 r E12
2006-01-09 15:32:31 C 09 03 06.91 -12 26 43.4 r E12
2006-01-09 15:45:57 C 09 03 06.98 -12 27 00.3 r E12
2006-01-09 15:58:50 C 09 03 07.05 -12 27 16.3 r E12
2006-02-25 04:54:25 C 08 58 36.44 -21 15 21.5 r 703
2006-02-25 05:02:11 C 08 58 36.48 -21 15 18.3 r 703
2006-02-25 05:17:50 C 08 58 36.51 -21 15 12.3 r 703
2006-03-20 20:45:37 C 09 18 14.73 -15 01 43.8 c 246
2006-03-20 20:46:39 C 09 18 14.76 -15 01 43.1 c 246
2006-03-20 20:47:37 C 09 18 14.79 -15 01 41.9 c 246
2006-03-20 20:48:27 C 09 18 14.84 -15 01 41.3 c 246
2006-03-20 20:49:05 C 09 18 14.90 -15 01 41.6 c 246
2006-03-20 20:49:57 C 09 18 14.97 -15 01 40.0 c 246
2006-03-20 20:50:40 C 09 18 15.02 -15 01 39.6 c 246
2006-04-21 04:49:56 C 10 15 38.48 -06 54 55.6 r 703
2006-04-21 05:03:40 C 10 15 39.67 -06 54 48.5 r 703
2006-04-21 05:16:03 C 10 15 40.93 -06 54 44.7 r 703
2006-04-21 05:28:39 C 10 15 41.83 -06 54 38.2 r 703
2007-09-13 07:59:43 C 03 38 32.10 +27 32 06.8 o H55
2007-09-13 08:24:14 C 03 38 33.48 +27 32 10.5 o H55
2007-09-13 08:42:56 C 03 38 34.47 +27 32 13.2 o H55
2007-09-13 09:32:14 C 03 38 37.42 +27 32 21.1 o 291
2007-09-13 09:39:38 C 03 38 37.84 +27 32 22.5 o 291
2007-09-13 09:45:41 C 03 38 38.17 +27 32 23.9 o 291
2007-11-02 07:15:31 C 04 07 17.94 +25 23 36.4 o 691
2007-11-02 07:40:57 C 04 07 17.27 +25 23 23.6 o 691
2007-11-02 08:06:24 C 04 07 16.58 +25 23 12.6 o 691