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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1358356563249824 6.3175e-08  
a 2.323160484458165 1.6206e-08 AU
q 2.007592455303526 1.4725e-07 AU
i 7.395371939025788 7.0774e-06 deg
node 121.2981834533171 5.9774e-05 deg
peri 181.4285690279 7.0394e-05 deg
M 67.6583959216197 4.3903e-05 deg
tp 2456557.427156638427
(2013-Sep-21.92715664)
0.00015611 JED
period 1293.353506511443
3.54
1.3533e-05
3.705e-08
d
yr
n .2783461738709215 2.9125e-09 deg/d
Q 2.638728513612804 1.8407e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      943  
   data-arc span      10100 days (27.65 yr)  
   first obs. used      1985-08-13  
   last obs. used      2013-04-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5737  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 14:46:04  

Additional Information
 Earth MOID = .991373 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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