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JPL Small-Body Database Browser
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18458 Caesar (1995 EY8)
Classification: Main-belt Asteroid          SPK-ID: 2018458
[ 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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1383695926849267 4.7333e-08  
a 2.300055400272484 7.8673e-09 au
q 1.981797671384015 1.0987e-07 au
i 5.871793273747003 4.8758e-06 deg
node 353.7207563456597 3.1e-05 deg
peri 220.6858114462445 3.3603e-05 deg
M 51.59855060019434 1.3376e-05 deg
tp 2458817.883138858043
(2019-Nov-30.38313886)		 4.7132e-05 TDB
period 1274.106912818146
3.49		 6.5371e-06
1.79e-08		 d
yr
n .2825508569008 1.4497e-09 deg/d
Q 2.618313129160954 8.9559e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1449  
   data-arc span      11383 days (31.16 yr)  
   first obs. used      1988-03-22  
   last obs. used      2019-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52618  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 22:39:07  

Additional Information
 Earth MOID = .980214 au 
 Jupiter MOID = 2.36238 au 
 T_jup = 3.572 
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[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0   n/a MPO384912  
diameter diameter 2.425 km 0.608 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.300   0.187 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18458 Caesar           Discovered 1995 Mar. 5 by F. Börngen at Tautenburg.
Emperor Gaius Julius Caesar (100-44 B.C.) promulgated in 46 B.C. on the advice of the Alexandrine astronomer Sosigenes what is now called the Julian calendar. In 44 B.C., after the assassination of Julius, the fifth month "Quintilis" was renamed Julius (July).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020526/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1995 EY8 = 1993 TF7 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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