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3000 Leonardo (1981 EG19)
Classification: Main-belt Asteroid          SPK-ID: 2003000
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .180714188365629 4.2197e-08  
a 2.351365588618331 7.8336e-09 au
q 1.9264404647203 9.751e-08 au
i 2.751223207635407 4.0137e-06 deg
node 200.9746639589834 7.1949e-05 deg
peri 173.6700411316091 7.2559e-05 deg
M 107.724086878386 1.0057e-05 deg
tp 2458606.415834688937
(2019-May-02.91583469)
3.6189e-05 TDB
period 1316.978436513884
3.61
6.5813e-06
1.802e-08
d
yr
n .2733529950216499 1.366e-09 deg/d
Q 2.776290712516362 9.2492e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2043  
   data-arc span      21329 days (58.40 yr)  
   first obs. used      1961-12-03  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49408  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:48:26  

Additional Information
 Earth MOID = .927388 au 
 Jupiter MOID = 2.68835 au 
 T_jup = 3.534 
[ show covariance matrix ]

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 13.8   n/a MPO502182  
diameter diameter 9.838 km 0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.524 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Hayes-Gehrke, M.N.; (2016) Minor Planet Bull. 43, 119.]
geometric albedo albedo 0.115   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3000 Leonardo (1981 EG19)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1981 EG19 = 1961 XB = 1975 NK1 = 1979 UT4 = 1979 WC6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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