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129342 Ependes (2005 VA4)
Classification: Main-belt Asteroid          SPK-ID: 2129342
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2228833010202022 6.0043e-08  
a 2.616102434646081 2.1633e-08 au
q 2.033016888205174 1.6669e-07 au
i 5.083396521781386 5.7299e-06 deg
node 153.3095495502554 5.4101e-05 deg
peri 189.4479584777009 5.4981e-05 deg
M 259.3802536054807 1.2727e-05 deg
tp 2459632.477634505992
(2022-Feb-21.97763451)
5.7806e-05 TDB
period 1545.541049292762
4.23
1.917e-05
5.248e-08
d
yr
n .2329281387671557 2.8892e-09 deg/d
Q 3.199187981086987 2.6455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      498  
   data-arc span      6979 days (19.11 yr)  
   first obs. used      2002-01-09  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56374  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:46:10  

Additional Information
 Earth MOID = 1.02337 au 
 Jupiter MOID = 2.21256 au 
 T_jup = 3.366 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456939.5 (2014-Oct-09.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2211121800643813 5.9633e-08  
q 2.039375142394809 1.6508e-07 au
tp 2456534.193707277293
(2013-Aug-29.69370728)
4.579e-05 TDB
node 153.3521224384277 5.4157e-05 deg
peri 188.6260293130991 5.5052e-05 deg
i 5.075513866049146 5.7234e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      498  
   data-arc span      6979 days (19.11 yr)  
   first obs. used      2002-01-09  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56374  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:46:10  

Additional Information
 Jupiter MOID = 2.21256 au 
 T_jup = 3.366 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.556113169029709E-15 -9.807872274997288E-15 8.065936726078168E-14 -2.268274919271129E-14 9.477952877255756E-14 -1.787542256536547E-15
q -9.807872274997288E-15 2.725290589026403E-14 -2.333995625356468E-13 6.428984209896232E-14 -2.572471492362524E-13 5.315183512391112E-15
tp 8.065936726078168E-14 -2.333995625356468E-13 2.096725058244551E-9 5.709445680527543E-12 4.704849342559181E-10 6.472523670476562E-13
node -2.268274919271129E-14 6.428984209896232E-14 5.709445680527543E-12 2.932972995315784E-9 -2.920474361258102E-9 5.675023245583757E-11
peri 9.477952877255756E-14 -2.572471492362524E-13 4.704849342559181E-10 -2.920474361258102E-9 3.030758933165878E-9 -5.64109627043098E-11
i -1.787542256536547E-15 5.315183512391112E-15 6.472523670476562E-13 5.675023245583757E-11 -5.64109627043098E-11 3.275701558978833E-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 15.7   n/a MPO333805  

129342 Ependes           Discovered 2005 Nov. 5 by P. Kocher at the Observatoire Naef, Marly.
Ependes is a small village in a green landscape some 6 km from Fribourg, Switzerland. This municipality made property available for the the R. A. Naef Observatory. Its goal is to introduce astronomy to the people, especially to young people.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

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Alternate Designations
 2005 VA4 = 2004 MP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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