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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 ]

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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .181074728816027 1.2696e-08  
a 2.350677618093861 6.6744e-09 au
q 1.925029305863611 2.9509e-08 au
i 2.751998477483188 7.4099e-07 deg
node 200.9679790683353 1.1964e-05 deg
peri 173.6627143465846 1.2336e-05 deg
M 216.002536284367 3.8043e-06 deg
tp 2459923.050921554951
(2022-Dec-09.55092156)
1.5274e-05 TDB
period 1316.400489762259
3.60
5.6066e-06
1.535e-08
d
yr
n .2734730067329401 1.1647e-09 deg/d
Q 2.776325930324111 7.883e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2442  
   data-arc span      21757 days (59.57 yr)  
   first obs. used      1961-12-03  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48437  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:08:23  

Additional Information
 Earth MOID = .925181 au 
 Jupiter MOID = 2.69034 au 
 T_jup = 3.534 
[ 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 13.84   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

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