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4444 Escher (1985 SA)
Classification: Main-belt Asteroid          SPK-ID: 2004444
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .134888166673585 5.2879e-08  
a 2.324718162385131 1.7069e-08 au
q 2.011141191428215 1.209e-07 au
i 7.391914497864905 5.7883e-06 deg
node 121.2890225295644 4.7333e-05 deg
peri 181.6026143159477 5.8392e-05 deg
M 234.4030522138439 4.2116e-05 deg
tp 2457852.179598265369
(2017-Apr-08.67959827)
0.00015499 JED
period 1294.654513837286
3.54
1.4259e-05
3.904e-08
d
yr
n .2780664618647792 3.0625e-09 deg/d
Q 2.638295133342047 1.9371e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1113  
   data-arc span      11068 days (30.30 yr)  
   first obs. used      1985-08-13  
   last obs. used      2015-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5061  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:52:28  

Additional Information
 Earth MOID = .993908 au 
 Jupiter MOID = 2.5627 au 
 T_jup = 3.552 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7 mag n/a MPO337289  

4444 Escher           Discovered 1985 Sept. 16 by H. U. Norgaard-Nielsen, L. Hansen and P. R. Christensen at the European Southern Observatory.
The prints of Dutch graphic artist Maurits C. Escher (1898-1972) are characterized by their sophisticated use of visual illusion. The name was suggested by J. Meeus.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060413/MPCPages.arcLast Updated: 2006-04-17
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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