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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 
[ show covariance matrix ]

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1951-Dec-02 00:01 00:26 Psych 0.0453867102881395 0.0453797282396415 0.0453936923672743 1.45448295602119 1.45448277274086 2433982.500703909 25.8686089066735 349.279453612392 51.9125783254874 8.91479945316299 27733.0019783001 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 17:46:11 2021-Apr-13 17:46
2146-Oct-27 23:23 01:11 Psych 0.0460767241549277 0.0460595699047479 0.0460938795614651 1.48395095808418 1.48395078113358 2505170.474229459 70.6698848917437 920.460110388438 49.0450279079915 22.8711792562956 54701.3582231236 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 17:46:11 2021-Apr-13 17:46

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