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20968 (1978 VM8)
Classification: Main-belt Asteroid          SPK-ID: 2020968
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1520568863219624 3.0772e-08  
a 2.370403402061403 9.6794e-09 au
q 2.009967241416959 7.0965e-08 au
i 5.935818368506625 5.3127e-06 deg
node 229.378643697077 4.0146e-05 deg
peri 243.7365362908061 4.5457e-05 deg
M 157.9121967476918 2.0895e-05 deg
tp 2458615.783978453451
(2019-May-12.28397845)
7.6345e-05 TDB
period 1333.005126216347
3.65
8.1648e-06
2.235e-08
d
yr
n .2700664783051793 1.6542e-09 deg/d
Q 2.730839562705847 1.1151e-08 au
  Orbit Determination Parameters
   # obs. used (total)      845  
   data-arc span      15228 days (41.69 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-07-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54493  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:23  

Additional Information
 Earth MOID = 1.03462 au 
 Jupiter MOID = 2.40378 au 
 T_jup = 3.522 
[ 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 15.89   n/a E2021B10  

20968 (1978 VM8)          Discovered 1978-Nov-07 by Helin, E. F., Bus, S. J. at Palomar
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1978 VM8 = 1998 HK78 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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