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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05397331092801711 3.3911e-08  
a 2.257459821253097 8.0469e-09 au
q 2.135617240413097 7.646e-08 au
i 3.263604282842204 3.8746e-06 deg
node 58.10034224494467 6.9758e-05 deg
peri 254.0325185843968 7.9628e-05 deg
M 196.8702881156145 3.8922e-05 deg
tp 2459561.882718589647
(2021-Dec-13.38271859)
0.00013415 TDB
period 1238.87780072526
3.39
6.6241e-06
1.814e-08
d
yr
n .2905855604073702 1.5537e-09 deg/d
Q 2.379302402093096 8.4812e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1273  
   data-arc span      15065 days (41.25 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5114  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:47:39  

Additional Information
 Earth MOID = 1.12398 au 
 Jupiter MOID = 2.73175 au 
 T_jup = 3.618 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456953.5 (2014-Oct-23.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05458793923862374 3.3953e-08  
q 2.134171868515311 7.661e-08 au
tp 2457083.575392539347
(2015-Mar-02.07539254)
0.00013214 TDB
node 58.12030988274432 6.9775e-05 deg
peri 253.8928867199443 7.9428e-05 deg
i 3.263777123771435 3.8739e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1273  
   data-arc span      15065 days (41.25 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5114  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:47:39  

Additional Information
 Jupiter MOID = 2.73175 au 
 T_jup = 3.618 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.152807947113696E-15 -2.588417254278724E-15 1.028221515923145E-12 6.937860826778676E-15 2.925858642745526E-13 -4.89595014922173E-17
q -2.588417254278724E-15 5.869070650618845E-15 -2.340874065634274E-12 -1.551481117470831E-14 -6.687591592073606E-13 1.696041321397413E-16
tp 1.028221515923145E-12 -2.340874065634274E-12 1.74602754956136E-8 3.410762252212575E-11 5.029233432940804E-9 -4.511258924137326E-13
node 6.937860826778676E-15 -1.551481117470831E-14 3.410762252212575E-11 4.868563414372195E-9 -4.850589628786135E-9 -5.156155622489295E-11
peri 2.925858642745526E-13 -6.687591592073606E-13 5.029233432940804E-9 -4.850589628786135E-9 6.308840285019191E-9 5.135536948844276E-11
i -4.89595014922173E-17 1.696041321397413E-16 -4.511258924137326E-13 -5.156155622489295E-11 5.135536948844276E-11 1.500703401802833E-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

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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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