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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07480872084517091 6.5722e-08  
a 2.281552024791293 1.1062e-08 au
q 2.110872036274947 1.5226e-07 au
i 23.73338716387084 5.7191e-06 deg
node 49.04705036575726 9.1844e-06 deg
peri 166.2008691716764 2.9036e-05 deg
M 262.426190453697 3.0746e-05 deg
tp 2459341.673076489258
(2021-May-07.17307649)
0.00010849 TDB
period 1258.763064671042
3.45
9.1547e-06
2.506e-08
d
yr
n .2859950455362944 2.08e-09 deg/d
Q 2.452232013307639 1.189e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1339  
   data-arc span      13951 days (38.20 yr)  
   first obs. used      1981-10-24  
   last obs. used      2020-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47073  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 23:18:15  

Additional Information
 Earth MOID = 1.10472 au 
 Jupiter MOID = 2.53311 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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