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172555 (2003 US109)
Classification: Main-belt Asteroid          SPK-ID: 2172555
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1594374597595541 7.965e-08  
a 2.5421806255279 1.4534e-08 au
q 2.136861804343777 2.065e-07 au
i 13.87419881518683 6.9159e-06 deg
node 250.431773625069 3.1654e-05 deg
peri 94.89688019966282 3.9889e-05 deg
M 75.61033473814706 2.1833e-05 deg
tp 2458689.552769051275
(2019-Jul-25.05276905)
9.047e-05 TDB
period 1480.498711309952
4.05
1.2696e-05
3.476e-08
d
yr
n .2431613058828469 2.0853e-09 deg/d
Q 2.947499446712022 1.6851e-08 au
  Orbit Determination Parameters
   # obs. used (total)      444  
   data-arc span      10272 days (28.12 yr)  
   first obs. used      1991-12-14  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53783  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 16:51:08  

Additional Information
 Earth MOID = 1.18373 au 
 Jupiter MOID = 2.55779 au 
 T_jup = 3.387 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457494.5 (2016-Apr-16.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1610983458050854 8.0012e-08  
q 2.131806099231206 2.0775e-07 au
tp 2457208.584616351067
(2015-Jul-05.08461635)
9.3424e-05 TDB
node 250.4799129647937 3.1709e-05 deg
peri 94.69546079920929 3.9757e-05 deg
i 13.86485304689005 6.9171e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      444  
   data-arc span      10272 days (28.12 yr)  
   first obs. used      1991-12-14  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53783  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 16:51:08  

Additional Information
 Jupiter MOID = 2.55779 au 
 T_jup = 3.387 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.401948384272546E-15 -1.659654174953451E-14 4.939417206876401E-12 -2.901404863938608E-14 1.243467005442336E-12 -4.472159905624149E-14
q -1.659654174953451E-14 4.316020846328326E-14 -1.302331484830398E-11 7.646216610531543E-14 -3.279073987961008E-12 1.169700173217011E-13
tp 4.939417206876401E-12 -1.302331484830398E-11 8.72800269463756E-9 -4.306198906921765E-12 2.316248700907133E-9 -4.859844386624968E-11
node -2.901404863938608E-14 7.646216610531543E-14 -4.306198906921765E-12 1.005466201639944E-9 -9.762794601066092E-10 -1.326052671669366E-10
peri 1.243467005442336E-12 -3.279073987961008E-12 2.316248700907133E-9 -9.762794601066092E-10 1.580583980656227E-9 1.163135844794758E-10
i -4.472159905624149E-14 1.169700173217011E-13 -4.859844386624968E-11 -1.326052671669366E-10 1.163135844794758E-10 4.784654258697097E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO436858  

172555 (2003 US109)          Discovered 2003-Oct-19 by NEAT at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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