54509 YORP (2000 PH5)

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2299638514 ± 2.00e+00
Semi-major axis (a)1.0058563387 AU ± 3.00e+00
Inclination (i)1.59947613° ± 4.00e+00
Long. of Asc. Node (Ω)278.18541804° ± 5.00e+00
Arg. of Perihelion (ω)278.99868894° ± 6.00e+00
Mean Anomaly (M)130.15651893° ± 1.73e-04
Mean Motion (n)0.9770309931°/day ± 4.37e+00
Perihelion dist (q)0.77454574 AU ± 3.06e+00
Aphelion dist (Q)1.23716694 AU ± 4.20e+00
Orbital Period1.00879736 yr ± 4.51e+00
NGA Modelr2
A28.79457947e-07 AU/d²
Physical Parameters
H (abs. magnitude)22.66
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-27
RMS Residual0.478″
Uncertainty0
Orbit TypeApollo
MOID0.000494 AU
Observations Used515
Oppositions1
Arc Total2000-2005
First Observation Used2000-08-03
Last Observation Used2005-08-03
Observations (548)
Date Type RA Dec Mag Band Observatory
2004-07-30 22:45:08 C 18 41 56.39 +09 15 32.6 c A48
2004-07-31 05:21:33 C 18 44 47.47 +08 18 22.8 r 649
2004-07-31 05:24:43 C 18 44 48.52 +08 17 56.0 r 649
2004-07-31 05:30:59 C 18 44 50.65 +08 17 03.2 r 649
2004-07-31 20:55:54 C 18 50 43.98 +06 16 51.0 r 118
2004-07-31 20:57:09 C 18 50 44.32 +06 16 42.1 r 118
2004-07-31 20:59:40 C 18 50 45.06 +06 16 24.2 r 118
2004-07-31 22:38:15 C 18 51 13.72 +06 05 08.3 c A55
2004-07-31 22:39:19 C 18 51 14.04 +06 05 01.1 c A55
2004-07-31 22:41:28 C 18 51 14.64 +06 04 45.6 c A55
2004-07-31 22:43:38 C 18 51 15.25 +06 04 31.5 c A55
2004-07-31 22:44:42 C 18 51 15.56 +06 04 23.5 c A55
2004-08-01 05:39:03 C 18 53 31.95 +05 17 52.4 r 649
2004-08-01 05:44:32 C 18 53 33.34 +05 17 16.5 r 649
2004-08-01 05:49:18 C 18 53 34.55 +05 16 44.9 r 649
2004-08-01 19:51:59 C 18 57 51.99 +03 50 45.3 c A55
2004-08-01 19:53:28 C 18 57 52.26 +03 50 36.8 c A55
2004-08-01 19:54:58 C 18 57 52.62 +03 50 28.6 c A55
2004-08-01 19:56:28 C 18 57 52.99 +03 50 19.4 c A55
2004-08-01 21:36:31 C 18 58 14.17 +03 40 28.2 d 048
2004-08-01 21:36:57 C 18 58 14.31 +03 40 25.5 d 048
2004-08-01 21:39:29 C 18 58 14.80 +03 40 11.5 d 048
2004-08-01 21:39:54 C 18 58 14.96 +03 40 09.3 d 048
2004-08-01 21:41:35 C 18 58 15.23 +03 39 59.4 d 048
2004-08-02 20:10:20 C 19 03 49.43 +01 46 01.2 o 198
2004-08-02 20:15:48 C 19 03 50.41 +01 45 36.2 o 198
2004-08-02 20:18:31 C 19 03 50.89 +01 45 23.8 o 198
2004-08-02 20:21:15 C 19 03 51.39 +01 45 11.1 o 198
2004-08-08 21:20:33 C 19 23 56.90 -05 05 02.1 o 198
2004-08-08 21:22:20 C 19 23 57.00 -05 05 05.0 o 198
2004-08-08 21:30:30 C 19 23 57.49 -05 05 19.7 r 240
2004-08-08 21:31:08 C 19 23 57.56 -05 05 20.5 o 198
2004-08-08 21:33:06 C 19 23 57.65 -05 05 24.2 r 240
2004-08-08 21:35:33 C 19 23 57.84 -05 05 28.2 o 198
2004-08-08 21:35:40 C 19 23 57.80 -05 05 28.4 r 240
2004-08-08 21:38:14 C 19 23 57.98 -05 05 33.1 r 240
2004-08-08 21:39:56 C 19 23 58.13 -05 05 35.9 o 198
2004-08-09 04:45:35 C 19 24 37.13 -05 17 21.0 18.5 c 704
2004-08-09 04:59:04 C 19 24 37.86 -05 17 43.0 18.7 c 704
2004-08-09 05:12:32 C 19 24 38.75 -05 18 07.2 19.9 c 704
2004-08-09 05:26:00 C 19 24 39.31 -05 18 28.5 18.6 c 704
2004-08-09 05:40:03 C 19 24 40.07 -05 18 52.2 18.7 c 704
2005-07-31 11:07:41 C 16 02 49.20 -01 43 50.9 r E12
2005-07-31 11:18:48 C 16 02 58.27 -01 44 33.8 r E12
2005-07-31 11:29:54 C 16 03 07.34 -01 45 16.0 r E12
2005-07-31 11:41:05 C 16 03 16.52 -01 45 59.1 r E12
2005-08-03 22:22:14 C 17 02 08.31 -06 04 13.1 18.5 r 130
2005-08-03 22:25:53 C 17 02 10.42 -06 04 21.0 18.6 r 130
Radar Observations (5)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2001-07-27 01:54:00 -152234.612 5 Hz 8560 -14 -14
2001-07-27 08:01:00 13507054.547 10 us 8560 -14 -14
2001-07-28 05:00:00 15490726.314 1 us 8560 -14 -14
2004-07-27 01:13:00 14410506.25 0.3 us 2380 -1 -1
2004-07-28 01:55:00 16817885.86 0.3 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)