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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05397331887779593 3.4615e-08  
a 2.257459818708155 8.3462e-09 au
q 2.135617220059209 7.8499e-08 au
i 3.263604800389835 4.0907e-06 deg
node 58.10033533617154 7.2135e-05 deg
peri 254.0325437665449 8.3216e-05 deg
M 196.8702717195239 4.1423e-05 deg
tp 2459561.882774064650
(2021-Dec-13.38277406)
0.00014246 TDB
period 1238.877798630292
3.39
6.8705e-06
1.881e-08
d
yr
n .2905855608987565 1.6115e-09 deg/d
Q 2.379302417357102 8.7967e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      15037 days (41.17 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:17:37  

Additional Information
 Earth MOID = 1.12398 au 
 Jupiter MOID = 2.73175 au 
 T_jup = 3.618 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456848.5 (2014-Jul-10.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05456489795800595 3.4672e-08  
q 2.134067075559879 7.8679e-08 au
tp 2457083.804268593607
(2015-Mar-02.30426859)
0.00014163 TDB
node 58.12086530321678 7.2148e-05 deg
peri 253.9669984069071 8.2992e-05 deg
i 3.263891345547904 4.0903e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      15037 days (41.17 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51477  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:17:37  

Additional Information
 Jupiter MOID = 2.73175 au 
 T_jup = 3.618 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.202143251541651E-15 -2.714314409763014E-15 1.38460805066981E-12 1.116202108388977E-14 3.977599697895053E-13 -2.969006065037788E-16
q -2.714314409763014E-15 6.190399263204483E-15 -3.251666118870398E-12 -2.511757341736758E-14 -9.387198198298404E-13 7.198793297277069E-16
tp 1.38460805066981E-12 -3.251666118870398E-12 2.005866006303682E-8 3.730802953287353E-11 5.823996441840763E-9 -2.927787899144031E-13
node 1.116202108388977E-14 -2.511757341736758E-14 3.730802953287353E-11 5.205405339616044E-9 -5.185912138714445E-9 -7.564331711139346E-11
peri 3.977599697895053E-13 -9.387198198298404E-13 5.823996441840763E-9 -5.185912138714445E-9 6.887682202500169E-9 7.544750077988674E-11
i -2.969006065037788E-16 7.198793297277069E-16 -2.927787899144031E-13 -7.564331711139346E-11 7.544750077988674E-11 1.673050941446535E-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 15.7   n/a MPO347635  

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

[ show close-approach data ]
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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