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20457 (1999 LX7)
Classification: Main-belt Asteroid          SPK-ID: 2020457
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2629496858106858 4.5969e-08  
a 2.577213677907076 1.2297e-08 au
q 1.899536151034408 1.2138e-07 au
i 8.52940543496028 3.3179e-06 deg
node 306.0482989747769 3.4052e-05 deg
peri 44.14535022771551 3.4869e-05 deg
M 340.9558792063138 6.8998e-06 deg
tp 2459080.443377920624
(2020-Aug-18.94337792)
2.8764e-05 TDB
period 1511.20738852728
4.14
1.0816e-05
2.961e-08
d
yr
n .2382201164003251 1.7049e-09 deg/d
Q 3.254891204779744 1.553e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1307  
   data-arc span      24056 days (65.86 yr)  
   first obs. used      1954-12-21  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47596  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:02:43  

Additional Information
 Earth MOID = .903307 au 
 Jupiter MOID = 2.21918 au 
 T_jup = 3.362 
[ 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 14.6   n/a MPO337431  
diameter diameter 4.603 km 0.890 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20457 (1999 LX7)          Discovered 1999-Jun-10 by Zoltowski, F. B. at Woomera
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 LX7 = 1991 RZ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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