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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04463494960511261 0.00026693  
a 42.76669966641035 0.015736 au
q 40.85781018202314 0.0036332 au
i 3.185158234699525 0.00023896 deg
node 133.0368452942142 0.001097 deg
peri 185.1138624925824 0.092267 deg
M 22.67270195192115 0.095066 deg
tp 2452166.844381526273
(2001-Sep-14.34438153)
23.902 TDB
period 102154.3893428321
279.68
56.381
0.1544
d
yr
n .003524077646745389 1.945e-06 deg/d
Q 44.67558915079756 0.016438 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 = 39.8438 au 
 Jupiter MOID = 35.7873 au 
 T_jup = 5.841 
[ 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 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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