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JPL Small-Body Database Browser
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3446 Combes (1942 EB)
Classification: Main-belt Asteroid          SPK-ID: 2003446
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 .156464250515526 3.852e-08  
a 2.376878301925142 7.8355e-09 au
q 2.004981819847808 9.1064e-08 au
i 7.683714045620512 4.9219e-06 deg
node 34.79392765345894 2.8908e-05 deg
peri 94.99214485298518 3.3202e-05 deg
M 55.81061936468577 1.5427e-05 deg
tp 2458392.997569802699
(2018-Oct-01.49756980)
5.7147e-05 TDB
period 1338.470630166405
3.66
6.6185e-06
1.812e-08
d
yr
n .2689636902643453 1.33e-09 deg/d
Q 2.748774784002475 9.0615e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1939  
   data-arc span      28184 days (77.16 yr)  
   first obs. used      1942-03-12  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45389  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 23:14:39  

Additional Information
 Earth MOID = 1.03717 au 
 Jupiter MOID = 2.32876 au 
 T_jup = 3.512 
[ 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 13.3   n/a MPO435730  
diameter diameter 8.411 km 0.246 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.144   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

3446 Combes (1942 EB)          Discovered 1942-Mar-12 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1942 EB = 1975 GL 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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