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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1638166436905429 7.4056e-08  
a 3.437078681120464 6.6852e-08 AU
q 2.874027987478991 2.7963e-07 AU
i 6.145575115312874 9.1304e-06 deg
node 127.8480511575186 8.3126e-05 deg
peri 315.9499388535684 9.0875e-05 deg
M 352.9707885806412 3.9662e-05 deg
tp 2457045.945066481551
(2015-Jan-23.44506648)
0.00025721 JED
period 2327.462208392443
6.37
6.7905e-05
1.859e-07
d
yr
n .1546749067296989 4.5127e-09 deg/d
Q 4.000129374761936 7.7804e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      543  
   data-arc span      9013 days (24.68 yr)  
   first obs. used      1989-12-30  
   last obs. used      2014-09-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61612  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 14:57:48  

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 (413)
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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