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55751 (1991 NM4)
Classification: Main-belt Asteroid          SPK-ID: 2055751
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1864829496978784 9.0081e-08  
a 2.745363387526148 3.8294e-08 AU
q 2.233399925027713 2.453e-07 AU
i 8.963408758806324 8.9194e-06 deg
node 277.0727718485102 5.2811e-05 deg
peri 45.17361569851732 5.9656e-05 deg
M 349.240636940719 3.6331e-05 deg
tp 2456850.157201984949
(2014-Jul-11.65720198)
0.00016826 JED
period 1661.491727352896
4.55
3.4764e-05
9.518e-08
d
yr
n .2166727610335775 4.5335e-09 deg/d
Q 3.257326850024584 4.5436e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      603  
   data-arc span      8034 days (22.00 yr)  
   first obs. used      1991-07-08  
   last obs. used      2013-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58957  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-06 06:01:57  

Additional Information
 Earth MOID = 1.22973 AU 
 T_jup = 3.305 
[ 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 14.0 mag n/a MPO266206  

55751 (1991 NM4)          Discovered 1991-Jul-08 by Debehogne, H. at La Silla (809)
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 NM4 = 2001 XQ106 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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