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442743 (2012 WF9)
Classification: Main-belt Asteroid          SPK-ID: 2442743
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1764214854754161 6.3942e-08  
a 2.256130393123641 1.6145e-08 au
q 1.858100517742534 1.4441e-07 au
i 6.608042710206071 6.8213e-06 deg
node 79.88595606440256 7.969e-05 deg
peri 307.7552966406669 8.5009e-05 deg
M 106.1727621257713 2.9077e-05 deg
tp 2458635.447492336703
(2019-May-31.94749234)
9.8281e-05 TDB
period 1237.783590890377
3.39
1.3287e-05
3.638e-08
d
yr
n .2908424401886282 3.122e-09 deg/d
Q 2.654160268504748 1.8994e-08 au
  Orbit Determination Parameters
   # obs. used (total)      96  
   data-arc span      8815 days (24.13 yr)  
   first obs. used      1995-12-16  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58377  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:43:03  

Additional Information
 Earth MOID = .872034 au 
 Jupiter MOID = 2.79474 au 
 T_jup = 3.594 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.9   n/a MPO402749  

442743 (2012 WF9)          Discovered 1995-Dec-16 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2012 WF9 = 1995 YU5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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