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JPL Small-Body Database Browser
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27758 Michelson (1991 RJ4)
Classification: Main-belt Asteroid          SPK-ID: 2027758
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09653315821184272 4.1274e-08  
a 3.028687432414424 2.025e-08 au
q 2.736318669326943 1.3051e-07 au
i 8.68435486166112 6.2206e-06 deg
node 353.4783384927075 2.9094e-05 deg
peri 71.69010940897557 4.3182e-05 deg
M 34.66785043537115 3.2549e-05 deg
tp 2458415.102222545125
(2018-Oct-23.60222255)
0.00017347 TDB
period 1925.218871247291
5.27
1.9308e-05
5.286e-08
d
yr
n .1869917261754072 1.8754e-09 deg/d
Q 3.321056195501906 2.2205e-08 au
  Orbit Determination Parameters
   # obs. used (total)      984  
   data-arc span      24866 days (68.08 yr)  
   first obs. used      1951-02-04  
   last obs. used      2019-03-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53546  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:05:18  

Additional Information
 Earth MOID = 1.76453 au 
 Jupiter MOID = 1.98456 au 
 T_jup = 3.219 
[ 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 13.9   n/a MPO337493  
diameter diameter 5.326 km 0.150 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.156   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27758 Michelson           Discovered 1991 Sept. 12 by F. Borngen and L. D. Schmadel at Tautenburg.
German-American physicist Albert Abraham Michelson (1852-1931), 1907 Nobel Physics Laureate, refuted the supposition of the ether and made an accurate determination of the speed of light. He also measured interferometrically the absolute diameters of several stars and resolved the structure of their spectral lines.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011101/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1991 RJ4 = 1999 AW25 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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