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55740 (1989 YL2)
Classification: Outer Main-belt Asteroid          SPK-ID: 2055740
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ 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 .163816650820465 7.2519e-08  
a 3.437078656813116 4.883e-08 AU
q 2.874027942647488 2.6486e-07 AU
i 6.14557865011195 8.2774e-06 deg
node 127.8480859087828 7.6381e-05 deg
peri 315.9498937118368 8.254e-05 deg
M 352.9708035672958 2.824e-05 deg
tp 2457045.944969108152
(2015-Jan-23.44496911)
0.00018279 JED
period 2327.462183702391
6.37
4.9598e-05
1.358e-07
d
yr
n .1546749083705124 3.2961e-09 deg/d
Q 4.000129370978742 5.6829e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      640  
   data-arc span      9183 days (25.14 yr)  
   first obs. used      1989-12-30  
   last obs. used      2015-02-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58442  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 16:47:55  

Additional Information
 Earth MOID = 1.89396 AU 
 T_jup = 3.108 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7 mag n/a MPO270408  

55740 (1989 YL2)          Discovered 1989-Dec-30 by McNaught, R. H. at Siding Spring
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1989 YL2 = 1990 BY2 = 2001 UQ135 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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