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13943 (1990 HG)
Classification: Main-belt Asteroid          SPK-ID: 2013943
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07505839016140617 6.5932e-08  
a 2.28114684548544 1.1649e-08 au
q 2.109927635541533 1.5251e-07 au
i 23.73671153531978 5.8827e-06 deg
node 49.048867308768 1.0152e-05 deg
peri 166.1570427997097 3.025e-05 deg
M 148.0727347132002 3.0867e-05 deg
tp 2458082.892109348459
(2017-Nov-25.39210935)
0.00010686 TDB
period 1258.427765216004
3.45
9.6397e-06
2.639e-08
d
yr
n .2860712469564811 2.1913e-09 deg/d
Q 2.452366055429346 1.2524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1263  
   data-arc span      13914 days (38.09 yr)  
   first obs. used      1981-10-24  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47674  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 23:02:05  

Additional Information
 Earth MOID = 1.10388 au 
 Jupiter MOID = 2.53353 au 
 T_jup = 3.490 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9   n/a MPO299064  
diameter diameter 4.203 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.437   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13943 (1990 HG)          Discovered 1990-Apr-26 by Helin, E. F. at Palomar
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1990 HG = 1981 UF23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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