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20047 (1993 FD18)
Classification: Main-belt Asteroid          SPK-ID: 2020047
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2746368468471412 5.011e-08  
a 2.744744156571446 1.7262e-08 au
q 1.990936276008548 1.3932e-07 au
i 10.70530801413825 5.1659e-06 deg
node 47.0159981151913 2.4833e-05 deg
peri 311.9647953753914 2.5911e-05 deg
M 186.1726613039282 1.1726e-05 deg
tp 2459802.486044284157
(2022-Aug-10.98604428)
5.9118e-05 TDB
period 1660.929621934211
4.55
1.5668e-05
4.29e-08
d
yr
n .2167460892056145 2.0447e-09 deg/d
Q 3.498552037134344 2.2002e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1182  
   data-arc span      12223 days (33.46 yr)  
   first obs. used      1986-12-01  
   last obs. used      2020-05-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52847  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:05:05  

Additional Information
 Earth MOID = 1.00667 au 
 Jupiter MOID = 2.01862 au 
 T_jup = 3.268 
[ 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 14.0   n/a MPO431730  
diameter diameter 4.677 km 0.303 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.424   0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20047 (1993 FD18)          Discovered 1993-Mar-17 by UESAC at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1993 FD18 = 1986 XQ1 = 1999 VA191 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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