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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1863750740614616 8.1712e-08  
a 2.744950541715703 2.9263e-08 AU
q 2.233360181208389 2.3055e-07 AU
i 8.963240543270118 7.112e-06 deg
node 277.0701150238591 4.6982e-05 deg
peri 45.15203614870325 5.103e-05 deg
M 32.5992086634033 1.84e-05 deg
tp 2456850.080282194361
(2014-Jul-11.58028219)
8.5324e-05 JED
period 1661.116960511424
4.55
2.6563e-05
7.273e-08
d
yr
n .2167216448678986 3.4656e-09 deg/d
Q 3.256540902223016 3.4717e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      654  
   data-arc span      8478 days (23.21 yr)  
   first obs. used      1991-07-08  
   last obs. used      2014-09-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56514  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 15:51:45  

Additional Information
 Earth MOID = 1.23155 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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