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JPL Small-Body Database Browser
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39530 (1990 EX1)
Classification: Outer Main-belt Asteroid          SPK-ID: 2039530
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1523785019976849 3.4341e-08  
a 3.223578722855627 2.1331e-08 au
q 2.732374625995277 1.1018e-07 au
i 11.78991465659365 4.5085e-06 deg
node 203.9304559158211 1.9066e-05 deg
peri 300.8310137352826 2.4342e-05 deg
M 104.7828403212968 1.4529e-05 deg
tp 2458385.190651394389
(2018-Sep-23.69065139)
8.5787e-05 TDB
period 2114.004209265534
5.79
2.0983e-05
5.745e-08
d
yr
n .1702929437993287 1.6903e-09 deg/d
Q 3.714782819715978 2.4581e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1084  
   data-arc span      10668 days (29.21 yr)  
   first obs. used      1990-02-24  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55244  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 04:09:36  

Additional Information
 Earth MOID = 1.7661 au 
 Jupiter MOID = 1.43316 au 
 T_jup = 3.137 
[ 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 13.9   n/a MPO474252  
diameter diameter 9.420 km 0.493 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39530 (1990 EX1)          Discovered 1990-Mar-02 by Elst, E. W. at La Silla
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 EX1 = 1999 VK95 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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