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13909 (1978 VD8)
Classification: Main-belt Asteroid          SPK-ID: 2013909
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05408435512106673 3.3553e-08  
a 2.257103202253558 7.956e-09 au
q 2.13502923111798 7.5748e-08 au
i 3.263717256645207 3.8548e-06 deg
node 58.0958058615047 6.9089e-05 deg
peri 254.1725601028928 7.888e-05 deg
M 254.8563569433052 3.8627e-05 deg
tp 2459562.247944452141
(2021-Dec-13.74794445)
0.00013304 TDB
period 1238.584247385736
3.39
6.5488e-06
1.793e-08
d
yr
n .2906544312668658 1.5368e-09 deg/d
Q 2.379177173389136 8.3863e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1301  
   data-arc span      15439 days (42.27 yr)  
   first obs. used      1978-11-05  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50285  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:11:58  

Additional Information
 Earth MOID = 1.12143 au 
 Jupiter MOID = 2.73129 au 
 T_jup = 3.619 
[ 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 15.77   n/a E2021B10  

13909 (1978 VD8)          Discovered 1978-Nov-07 by Helin, E. F., Bus, S. J. at Palomar
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1978 VD8 = 1987 KJ4 = 1998 SG128 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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