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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1728114528239608 5.7176e-08  
a 2.946506151617778 1.5561e-08 au
q 2.437316142801972 1.7139e-07 au
i 8.383050761255816 7.2401e-06 deg
node 25.9690476169485 3.1037e-05 deg
peri 290.3829395626477 3.9969e-05 deg
M 152.1132867087727 2.1048e-05 deg
tp 2458615.907984733361
(2019-May-12.40798473)
0.00010853 TDB
period 1847.393686483163
5.06
1.4634e-05
4.007e-08
d
yr
n .1948691297550783 1.5437e-09 deg/d
Q 3.455696160433584 1.825e-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 = 1.43948 au 
 Jupiter MOID = 1.93347 au 
 T_jup = 3.232 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457272.5 (2015-Sep-07.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1758134729653425 5.7747e-08  
q 2.425310139070268 1.7387e-07 au
tp 2456771.224226567277
(2014-Apr-23.72422657)
0.0001094 TDB
node 26.02199686540407 3.0998e-05 deg
peri 290.4252875608833 3.9709e-05 deg
i 8.395331055361918 7.2524e-06 deg
  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
 Jupiter MOID = 1.93347 au 
 T_jup = 3.232 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.33472960150027E-15 -1.001437318067174E-14 4.573323934611365E-12 -3.368462605601175E-14 1.011711591657764E-12 -6.549266269338721E-15
q -1.001437318067174E-14 3.023235408856201E-14 -1.391254491984257E-11 1.007862263679319E-13 -3.067981622870546E-12 2.006362724172496E-14
tp 4.573323934611365E-12 -1.391254491984257E-11 1.196876840362785E-8 -7.369103318454073E-11 2.735738629907706E-9 -1.12134815936939E-11
node -3.368462605601175E-14 1.007862263679319E-13 -7.369103318454073E-11 9.608713248363752E-10 -9.661270922279679E-10 -1.174071979634495E-10
peri 1.011711591657764E-12 -3.067981622870546E-12 2.735738629907706E-9 -9.661270922279679E-10 1.576837744925264E-9 1.137325201235708E-10
i -6.549266269338721E-15 2.006362724172496E-14 -1.12134815936939E-11 -1.174071979634495E-10 1.137325201235708E-10 5.259788258974367E-11

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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