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447287 (2005 WU9)
Classification: Main-belt Asteroid          SPK-ID: 2447287
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1407202556339427 2.251e-07  
a 2.997183666620713 4.8733e-08 au
q 2.575419214871968 6.7983e-07 au
i 1.799500296441759 1.2018e-05 deg
node 60.01099096895452 0.00023555 deg
peri 309.0443001755262 0.00024173 deg
M 337.8811091296037 4.0957e-05 deg
tp 2459116.947269057673
(2020-Sep-24.44726906)
0.00021591 TDB
period 1895.258541958305
5.19
4.6224e-05
1.266e-07
d
yr
n .1899476994985731 4.6327e-09 deg/d
Q 3.418948118369457 5.5591e-08 au
  Orbit Determination Parameters
   # obs. used (total)      92  
   data-arc span      4093 days (11.21 yr)  
   first obs. used      2005-11-21  
   last obs. used      2017-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60027  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 11:41:00  

Additional Information
 Earth MOID = 1.57522 au 
 Jupiter MOID = 2.04287 au 
 T_jup = 3.238 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456801.5 (2014-May-24.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1457269072997216 2.2632e-07  
q 2.55945406512581 6.8966e-07 au
tp 2457218.796034031297
(2015-Jul-15.29603403)
0.00019504 TDB
node 60.0459568467134 0.00023473 deg
peri 308.6789905016259 0.00024013 deg
i 1.805397273486859 1.2038e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      92  
   data-arc span      4093 days (11.21 yr)  
   first obs. used      2005-11-21  
   last obs. used      2017-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60027  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 11:41:00  

Additional Information
 Jupiter MOID = 2.04287 au 
 T_jup = 3.238 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.122011508859285E-14 -1.558093117114201E-13 -1.397479982136342E-11 -2.633298735138578E-13 -6.348854824453032E-12 4.599999772218193E-15
q -1.558093117114201E-13 4.756315303587774E-13 4.143447291918286E-11 7.943625128933105E-13 1.897281029528684E-11 -1.324151335848391E-14
tp -1.397479982136342E-11 4.143447291918286E-11 3.804147482752745E-8 1.185339335153611E-10 9.560293984046209E-9 -1.095595520440365E-11
node -2.633298735138578E-13 7.943625128933105E-13 1.185339335153611E-10 5.509867513091319E-8 -5.502479986269691E-8 -7.402687504279597E-10
peri -6.348854824453032E-12 1.897281029528684E-11 9.560293984046209E-9 -5.502479986269691E-8 5.766033566106505E-8 7.370604831996254E-10
i 4.599999772218193E-15 -1.324151335848391E-14 -1.095595520440365E-11 -7.402687504279597E-10 7.370604831996254E-10 1.449134440738599E-10

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.0   n/a MPO361037  

447287 (2005 WU9)          Discovered 2005-Nov-21 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-10-28
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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