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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1637136898711559 7.4549e-08  
a 3.43683660537476 7.0568e-08 AU
q 2.8741794032246 2.7953e-07 AU
i 6.145569027227893 9.3549e-06 deg
node 127.8480054182822 8.9214e-05 deg
peri 315.9171892490028 9.7727e-05 deg
M 322.0535047047128 4.2768e-05 deg
tp 2457045.804731534075
(2015-Jan-23.30473153)
0.00028117 JED
period 2327.216325646672
6.37
7.1676e-05
1.962e-07
d
yr
n .1546912489538184 4.7644e-09 deg/d
Q 3.99949380752492 8.2121e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      540  
   data-arc span      8735 days (23.92 yr)  
   first obs. used      1989-12-30  
   last obs. used      2013-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61566  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Dec-20 16:30:58  

Additional Information
 Earth MOID = 1.89372 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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