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JPL Small-Body Database Browser
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21451 Fisher (1998 HS23)
Classification: Main-belt Asteroid          SPK-ID: 2021451
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07102902803869834 3.4363e-08  
a 2.280020949919632 8.2235e-09 au
q 2.118073277938971 7.7354e-08 au
i .6959467216821579 3.5029e-06 deg
node 108.9518086528916 0.00037929 deg
peri 321.068797435757 0.00038078 deg
M 195.4983959348619 3.3768e-05 deg
tp 2459175.111507966778
(2020-Nov-21.61150797)
0.00011862 TDB
period 1257.496205241435
3.44
6.8033e-06
1.863e-08
d
yr
n .2862831700799299 1.5488e-09 deg/d
Q 2.441968621900293 8.8076e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1467  
   data-arc span      9415 days (25.78 yr)  
   first obs. used      1992-09-22  
   last obs. used      2018-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55003  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:56:13  

Additional Information
 Earth MOID = 1.13209 au 
 Jupiter MOID = 2.71854 au 
 T_jup = 3.603 
[ 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 15.1   n/a MPO337439  

21451 Fisher           Discovered 1998 Apr. 28 by P. G. Comba at Prescott.
Ronald Aylmer Fisher (1890-1962), a graduate of the University of Cambridge, was the foremost statistician of his time. Initially interested in biological experiments, he made major contributions to significance testing, analysis of variance, parameter estimation and design of experiments.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1998 HS23 = 1992 SJ20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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