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447297 (2005 WM78)
Classification: Main-belt Asteroid          SPK-ID: 2447297
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07161161021491938 5.6345e-08  
a 3.080720255428336 5.1648e-08 au
q 2.860104917315395 2.0289e-07 au
i 13.36976057856508 7.1717e-06 deg
node 68.65672879632048 2.3771e-05 deg
peri 246.2208928275155 7.5118e-05 deg
M 2.808951296429038 6.5549e-05 deg
tp 2458985.089436075426
(2020-May-15.58943608)		 0.00035981 TDB
period 1975.044216643899
5.41		 4.9668e-05
1.36e-07		 d
yr
n .1822744002216474 4.5838e-09 deg/d
Q 3.301335593541277 5.5347e-08 au
   Orbit Determination Parameters
   # obs. used (total)      154  
   data-arc span      5362 days (14.68 yr)  
   first obs. used      2005-11-25  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49501  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 07:52:35  

Additional Information
 Earth MOID = 1.87654 au 
 Jupiter MOID = 1.90022 au 
 T_jup = 3.182 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457943.5 (2017-Jul-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07331791998823492 5.7297e-08  
q 2.852425400249353 2.0696e-07 au
tp 2457021.044317966208
(2014-Dec-29.54431797)		 0.0003783 TDB
node 68.69371708086112 2.3742e-05 deg
peri 248.064970290283 7.345e-05 deg
i 13.38320901778955 7.1806e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      154  
   data-arc span      5362 days (14.68 yr)  
   first obs. used      2005-11-25  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49501  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 07:52:35  

Additional Information
 Jupiter MOID = 1.90022 au 
 T_jup = 3.182 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.282998513188936E-15 -1.163207977887435E-14 9.570044693054094E-12 -3.591813711828344E-15 1.759962624129186E-12 -7.583670469870759E-15
q -1.163207977887435E-14 4.283359118697401E-14 -4.072840702004713E-11 1.117888604584955E-14 -7.369201095121502E-12 3.14919421244113E-14
tp 9.570044693054094E-12 -4.072840702004713E-11 1.431096728180555E-7 -1.681365723343273E-11 2.62951810355394E-8 -6.655380988863205E-11
node -3.591813711828344E-15 1.117888604584955E-14 -1.681365723343273E-11 5.63670876772115E-10 -5.513337794795957E-10 -3.579195085739978E-11
peri 1.759962624129186E-12 -7.369201095121502E-12 2.62951810355394E-8 -5.513337794795957E-10 5.394864800677744E-9 2.293793318360688E-11
i -7.583670469870759E-15 3.14919421244113E-14 -6.655380988863205E-11 -3.579195085739978E-11 2.293793318360688E-11 5.156074423057766E-11

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.98   n/a E2021B25  

447297 (2005 WM78)          Discovered 2005-Nov-25 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-10-28

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