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120439 (1978 VJ4)
Classification: Main-belt Asteroid          SPK-ID: 2120439
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1845415870652511 3.9118e-08  
a 2.453151406585767 7.8609e-09 au
q 2.000442952703076 9.771e-08 au
i 4.028590126913676 3.9361e-06 deg
node 235.4543951490557 6.2106e-05 deg
peri 170.2580609463726 6.3327e-05 deg
M 355.6946042176663 1.1695e-05 deg
tp 2459217.284002562750
(2021-Jan-02.78400256)
4.5598e-05 TDB
period 1403.411260675025
3.84
6.7456e-06
1.847e-08
d
yr
n .2565178220294769 1.233e-09 deg/d
Q 2.905859860468457 9.3115e-09 au
  Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      15415 days (42.20 yr)  
   first obs. used      1978-11-05  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49086  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:06:27  

Additional Information
 Earth MOID = 1.00918 au 
 Jupiter MOID = 2.48446 au 
 T_jup = 3.467 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457756.5 (2017-Jan-03.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1864646460234426 3.9423e-08  
q 1.995670111332795 9.8707e-08 au
tp 2457811.346732336458
(2017-Feb-26.84673234)
4.4137e-05 TDB
node 235.505050152413 6.2018e-05 deg
peri 169.7486902882916 6.3193e-05 deg
i 4.031439288499149 3.943e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      706  
   data-arc span      15415 days (42.20 yr)  
   first obs. used      1978-11-05  
   last obs. used      2021-01-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49086  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:06:27  

Additional Information
 Jupiter MOID = 2.48446 au 
 T_jup = 3.467 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.554188303943909E-15 -3.883704975923782E-15 -5.81542091294346E-13 -1.292488971414343E-14 -1.147574673065939E-13 -1.878771159647313E-15
q -3.883704975923782E-15 9.74309423150372E-15 1.423067558965071E-12 3.108324139904751E-14 2.774673214230493E-13 4.775672127951939E-15
tp -5.81542091294346E-13 1.423067558965071E-12 1.948030804249256E-9 1.12567083982473E-11 5.533471056136695E-10 1.661082055039869E-12
node -1.292488971414343E-14 3.108324139904751E-14 1.12567083982473E-11 3.846172863027774E-9 -3.833078911826931E-9 -6.957583147456763E-11
peri -1.147574673065939E-13 2.774673214230493E-13 5.533471056136695E-10 -3.833078911826931E-9 3.993380860878075E-9 6.986600983085198E-11
i -1.878771159647313E-15 4.775672127951939E-15 1.661082055039869E-12 -6.957583147456763E-11 6.986600983085198E-11 1.554726612906598E-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 16.3   n/a MPO436581  

120439 (1978 VJ4)          Discovered 1978-Nov-07 by Helin, E. F., Bus, S. J. at Palomar
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

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