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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .172883791034805 5.7105e-08  
a 2.946016813533292 1.551e-08 au
q 2.43669825835738 1.7109e-07 au
i 8.383390212605084 7.24e-06 deg
node 25.97810204156385 3.1037e-05 deg
peri 290.3132617931068 3.9976e-05 deg
M 113.9873558273761 2.1075e-05 deg
tp 2458615.702594458594
(2019-May-12.20259446)
0.00010852 TDB
period 1846.933499481566
5.06
1.4585e-05
3.993e-08
d
yr
n .1949176838803628 1.5393e-09 deg/d
Q 3.455335368709203 1.8191e-08 au
  Orbit Determination Parameters
   # obs. used (total)      541  
   data-arc span      9580 days (26.23 yr)  
   first obs. used      1994-10-26  
   last obs. used      2021-01-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50302  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:48:41  

Additional Information
 Earth MOID = 1.43758 au 
 Jupiter MOID = 1.93424 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 15.23   n/a MPCxxxxx  

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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