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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457093.5 (2015-Mar-12.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1524442716754599 3.0899e-08  
q 2.008216434143184 7.1367e-08 au
tp 2457284.531084441324
(2015-Sep-19.03108444)
7.4412e-05 TDB
node 229.4345112340307 4.0159e-05 deg
peri 243.8957996246613 4.5411e-05 deg
i 5.935661395946388 5.3125e-06 deg
  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
 Jupiter MOID = 2.40378 au 
 T_jup = 3.522 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.54760217733979E-16 -2.191578363774451E-15 2.79591671005143E-13 1.458760139636094E-15 8.180401781230678E-14 -1.001286587727065E-15
q -2.191578363774451E-15 5.093262402172849E-15 -5.901494433398551E-13 -3.796186763194423E-15 -1.756396057852635E-13 2.2278812464554E-15
tp 2.79591671005143E-13 -5.901494433398551E-13 5.537092915552887E-9 1.899100298910179E-12 1.592789636790126E-9 -4.761981513967659E-12
node 1.458760139636094E-15 -3.796186763194423E-15 1.899100298910179E-12 1.612765944255577E-9 -1.602999297819644E-9 -8.917410835498437E-11
peri 8.180401781230678E-14 -1.756396057852635E-13 1.592789636790126E-9 -1.602999297819644E-9 2.062174477598949E-9 8.733293141520243E-11
i -1.001286587727065E-15 2.2278812464554E-15 -4.761981513967659E-12 -8.917410835498437E-11 8.733293141520243E-11 2.822281679375769E-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 15.89   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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