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439858 (1999 ON4)
Classification: TransNeptunian Object          SPK-ID: 2439858
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04721685621868838 0.00026957  
a 42.90420544913802 0.015846 au
q 40.878403749269 0.0035424 au
i 3.18265754062874 0.00023865 deg
node 133.0102059885451 0.0010969 deg
peri 187.3900117214127 0.077121 deg
M 21.89817525379621 0.080035 deg
tp 2452756.632927525696
(2003-Apr-27.13292753)
19.972 TDB
period 102647.4635461271
281.03
56.867
0.1557
d
yr
n .003507149495595916 1.943e-06 deg/d
Q 44.93000714900703 0.016594 au
  Orbit Determination Parameters
   # obs. used (total)      43  
   data-arc span      5792 days (15.86 yr)  
   first obs. used      1999-07-19  
   last obs. used      2015-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .28577  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:53:55  

Additional Information
 Earth MOID = 39.8657 au 
 Jupiter MOID = 35.8181 au 
 T_jup = 5.849 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454165.5 (2007-Mar-06.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04285124212258437 0.00026539  
q 40.87890367929776 0.0036835 au
tp 2451886.693836058560
(2000-Dec-08.19383606)
26.37 TDB
node 133.0550130968411 0.0010981 deg
peri 184.0550259089049 0.10163 deg
i 3.186575531979274 0.0002393 deg
  Orbit Determination Parameters
   # obs. used (total)      43  
   data-arc span      5792 days (15.86 yr)  
   first obs. used      1999-07-19  
   last obs. used      2015-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .28577  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 12:53:55  

Additional Information
 Jupiter MOID = 35.8181 au 
 T_jup = 5.849 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.043061318052275E-8 9.711520027276031E-7 .005961792719429333 -1.071954715511591E-8 2.297583252149726E-5 -4.505448514852117E-9
q 9.711520027276031E-7 1.35683021055262E-5 .08781386584511564 -1.46636569214135E-7 .0003384268328747067 -6.179166901224279E-8
tp .005961792719429333 .08781386584511564 695.3926535019515 -.0008624718093957866 2.679986095192977 -.0003679611778967578
node -1.071954715511591E-8 -1.46636569214135E-7 -.0008624718093957866 1.205856830036997E-6 -4.526223592064932E-6 2.269652007210228E-7
peri 2.297583252149726E-5 .0003384268328747067 2.679986095192977 -4.526223592064932E-6 .01032964883091465 -1.64400905819072E-6
i -4.505448514852117E-9 -6.179166901224279E-8 -.0003679611778967578 2.269652007210228E-7 -1.64400905819072E-6 5.726241256704367E-8

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.6   n/a MPO224580  

439858 (1999 ON4)          Discovered 1999-Jul-19 by Mauna Kea at Mauna Kea
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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