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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1357252464597804 5.369e-08  
a 2.323248443304467 1.7147e-08 AU
q 2.007924975749667 1.2335e-07 AU
i 7.395367025320047 5.9037e-06 deg
node 121.2984233480214 4.9529e-05 deg
peri 181.439074228141 6.0144e-05 deg
M 123.3269576793403 4.1086e-05 deg
tp 2456557.404411200908
(2013-Sep-21.90441120)
0.00014437 JED
period 1293.426960084615
3.54
1.432e-05
3.921e-08
d
yr
n .2783303666226727 3.0815e-09 deg/d
Q 2.638571910859267 1.9475e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1004  
   data-arc span      10756 days (29.45 yr)  
   first obs. used      1985-08-13  
   last obs. used      2015-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51216  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:09:54  

Additional Information
 Earth MOID = .993644 AU 
 T_jup = 3.553 
[ 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 13.6 mag n/a MPO259370  

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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