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185815 (1999 XH139)
Classification: Main-belt Asteroid          SPK-ID: 2185815
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1729106472693404 6.1168e-08  
a 2.945266878876163 1.5954e-08 au
q 2.435998876468736 1.8386e-07 au
i 8.384346927729544 7.5032e-06 deg
node 25.98425282804038 3.2191e-05 deg
peri 290.223505795402 4.2401e-05 deg
M 75.08541208458041 2.2734e-05 deg
tp 2458615.431072796408
(2019-May-11.93107280)
0.00011706 TDB
period 1846.22831445792
5.05
1.5001e-05
4.107e-08
d
yr
n .1949921346026488 1.5844e-09 deg/d
Q 3.45453488128359 1.8713e-08 au
  Orbit Determination Parameters
   # obs. used (total)      518  
   data-arc span      9134 days (25.01 yr)  
   first obs. used      1994-10-26  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51551  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 20:53:10  

Additional Information
 Earth MOID = 1.43883 au 
 Jupiter MOID = 1.93488 au 
 T_jup = 3.233 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.2   n/a MPO449930  

185815 (1999 XH139)          Discovered 1999-Dec-02 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 1999 XH139 = 1994 UC3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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