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3530 Hammel (1981 EC20)
Classification: Main-belt Asteroid          SPK-ID: 2003530
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2262882618954534 3.3957e-08  
a 2.40058240295279 8.987e-09 au
q 1.857358783451792 8.2567e-08 au
i 1.17250066975043 3.7051e-06 deg
node 262.6474859309347 0.00019999 deg
peri 75.9468014337284 0.00020017 deg
M 296.1201718896169 9.5492e-06 deg
tp 2458841.565239898768
(2019-Dec-24.06523990)
3.6591e-05 TDB
period 1358.54289109226
3.72
7.6289e-06
2.089e-08
d
yr
n .2649897933738125 1.4881e-09 deg/d
Q 2.943806022453788 1.1021e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1713  
   data-arc span      16032 days (43.89 yr)  
   first obs. used      1975-12-01  
   last obs. used      2019-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52131  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:27:03  

Additional Information
 Earth MOID = .847892 au 
 Jupiter MOID = 2.44955 au 
 T_jup = 3.490 
[ 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 14.2   n/a MPO439098  
diameter diameter 5.305 km 0.619 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.173   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3530 Hammel (1981 EC20)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 EC20 = 1975 XG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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