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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1638166549390556 7.2747e-08  
a 3.437078646674861 5.1048e-08 AU
q 2.874027920014129 2.6681e-07 AU
i 6.145576888622922 8.4492e-06 deg
node 127.8480674085249 7.8411e-05 deg
peri 315.9499078020215 8.4593e-05 deg
M 352.9708096530701 2.9655e-05 deg
tp 2457045.944929561498
(2015-Jan-23.44492956)
0.00019203 JED
period 2327.462173404516
6.37
5.1851e-05
1.42e-07
d
yr
n .1546749090548727 3.4459e-09 deg/d
Q 4.000129373335593 5.941e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      608  
   data-arc span      9156 days (25.07 yr)  
   first obs. used      1989-12-30  
   last obs. used      2015-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58935  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 15:20:59  

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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