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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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1357252341224005 5.7349e-08  
a 2.323248448054931 1.8848e-08 AU
q 2.007925008518172 1.3449e-07 AU
i 7.395367636930862 6.4181e-06 deg
node 121.2984309604762 5.6702e-05 deg
peri 181.4390631712584 6.6334e-05 deg
M 123.3269579318691 4.1088e-05 deg
tp 2456557.404408934579
(2013-Sep-21.90440893)
0.0001444 JED
period 1293.426964051719
3.54
1.574e-05
4.309e-08
d
yr
n .2783303657689982 3.3871e-09 deg/d
Q 2.638571887591691 2.1406e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      923  
   data-arc span      10616 days (29.07 yr)  
   first obs. used      1985-08-13  
   last obs. used      2014-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52448  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 13:46:01  

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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