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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1118458514335788 1.1112e-07  
a 1.869653284916902 1.2978e-08 au
q 1.660540321379784 2.1489e-07 au
i 26.23138125967408 9.2628e-06 deg
node 53.88029636382628 1.5172e-05 deg
peri 149.1653176889322 3.5196e-05 deg
M 223.1223089392579 3.703e-05 deg
tp 2457955.534217976613
(2017-Jul-21.03421798)
9.8309e-05 JED
period 933.7702695091605
2.56
9.7227e-06
2.662e-08
d
yr
n .3855337996456401 4.0143e-09 deg/d
Q 2.07876624845402 1.443e-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 = .668836 au 
 Jupiter MOID = 2.92476 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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