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21664 Konradzuse (1999 RG1)
Classification: Main-belt Asteroid          SPK-ID: 2021664
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2089700911968351 3.3755e-08  
a 2.613169047069532 1.1822e-08 au
q 2.067094872990665 8.7815e-08 au
i 9.552639880760506 5.9313e-06 deg
node 29.55539918000874 2.9251e-05 deg
peri 71.06450119595767 3.3933e-05 deg
M 279.1425397539991 1.8314e-05 deg
tp 2459547.051098664048
(2021-Nov-28.55109866)
7.9733e-05 TDB
period 1542.942297958555
4.22
1.0471e-05
2.867e-08
d
yr
n .2333204556491263 1.5834e-09 deg/d
Q 3.159243221148399 1.4293e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1239  
   data-arc span      12062 days (33.02 yr)  
   first obs. used      1988-01-11  
   last obs. used      2021-01-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50482  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:53:52  

Additional Information
 Earth MOID = 1.10636 au 
 Jupiter MOID = 2.10325 au 
 T_jup = 3.358 
[ 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 14.44   n/a E2021B10  
diameter diameter 4.156 km 0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.195   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21664 Konradzuse           Discovered 1999 Sept. 4 by L. Šarounová at Ondřejov.
German engineer Konrad Zuse (1910-1995) developed and built the first binary digital computer. Working in complete isolation and secrecy, in 1941 he completed the Z3, the first operational program-controlled computer, before fleeing to Switzerland. Zuse computers were the first to be used by astronomers in Czechoslovakia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010902/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1999 RG1 = 1988 AR2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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