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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .180881529929679 1.2696e-08  
a 2.351058974508641 6.997e-09 au
q 1.925795830244616 2.9593e-08 au
i 2.751572640985288 7.4112e-07 deg
node 200.9682402984741 1.2009e-05 deg
peri 173.6612763448245 1.2439e-05 deg
M 162.4067852698919 3.7009e-06 deg
tp 2458606.487778052282
(2019-May-02.98777805)
1.2538e-05 TDB
period 1316.720847258975
3.60
5.878e-06
1.609e-08
d
yr
n .2734064708927591 1.2205e-09 deg/d
Q 2.776322118772667 8.2626e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2173  
   data-arc span      21652 days (59.28 yr)  
   first obs. used      1961-12-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49325  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 14:33:24  

Additional Information
 Earth MOID = .925304 au 
 Jupiter MOID = 2.68947 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 13.84   n/a E2021B10  
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. 2020-October); 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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