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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .262766375464795 4.5422e-08  
a 2.57660702939079 1.2014e-08 au
q 1.899561339280659 1.1983e-07 au
i 8.529551634824047 3.0816e-06 deg
node 306.0485699342525 3.3678e-05 deg
peri 44.16464989127665 3.4478e-05 deg
M 28.59896377791742 6.6976e-06 deg
tp 2459080.489704609357
(2020-Aug-18.98970461)
2.8401e-05 TDB
period 1510.673836860864
4.14
1.0566e-05
2.893e-08
d
yr
n .2383042528545204 1.6668e-09 deg/d
Q 3.25365271950092 1.5171e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1537  
   data-arc span      24159 days (66.14 yr)  
   first obs. used      1954-12-21  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46132  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:21:26  

Additional Information
 Earth MOID = .901594 au 
 Jupiter MOID = 2.22102 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 14.75   n/a E2021B10  
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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