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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1808815299382584 1.2696e-08  
a 2.35105897441896 6.9907e-09 au
q 1.925795830150986 2.9592e-08 au
i 2.751572640357019 7.4112e-07 deg
node 200.9682403553944 1.2008e-05 deg
peri 173.6612763467916 1.2437e-05 deg
M 162.4067852617386 3.7006e-06 deg
tp 2458606.487778116091
(2019-May-02.98777812)
1.2535e-05 TDB
period 1316.720847183635
3.60
5.8728e-06
1.608e-08
d
yr
n .2734064709084027 1.2194e-09 deg/d
Q 2.776322118686934 8.2552e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2181  
   data-arc span      21660 days (59.30 yr)  
   first obs. used      1961-12-03  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49265  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:39:50  

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 ]

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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