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39561 (1992 QA)
Classification: Mars-crossing Asteroid          SPK-ID: 2039561
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1117270209197918 1.1106e-07  
a 1.869617307963333 1.2969e-08 AU
q 1.660730535884509 2.1477e-07 AU
i 26.23041295918397 9.2624e-06 deg
node 53.88822644449104 1.5173e-05 deg
peri 149.0715742126545 3.5233e-05 deg
M 351.9057516542674 3.5656e-05 deg
tp 2457021.494306395340
(2014-Dec-29.99430640)
9.2603e-05 JED
period 933.7433174146535
2.56
9.7155e-06
2.66e-08
d
yr
n .3855449279109887 4.0115e-09 deg/d
Q 2.078504080042157 1.4418e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      631  
   data-arc span      14914 days (40.83 yr)  
   first obs. used      1974-07-13  
   last obs. used      2015-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52337  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 17:23:27  

Additional Information
 Earth MOID = .670933 AU 
 T_jup = 3.852 
[ 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 15.2 mag n/a MPO250590  

39561 (1992 QA)          Discovered 1992-Aug-19 by McNaught, R. H. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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