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393971 (2005 US291)
Classification: Main-belt Asteroid          SPK-ID: 2393971
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1867236598994991 4.3023e-08  
a 2.199503820034124 2.1478e-08 au
q 1.788804416794423 9.7868e-08 au
i 4.192574666612883 7.3672e-06 deg
node 258.0891823613641 8.0328e-05 deg
peri 42.59925003080522 8.529e-05 deg
M 251.6995168076217 3.4335e-05 deg
tp 2459358.937468365172
(2021-May-24.43746837)
0.00011773 TDB
period 1191.476573398548
3.26
1.7452e-05
4.778e-08
d
yr
n .3021461000891877 4.4256e-09 deg/d
Q 2.610203223273825 2.5488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      135  
   data-arc span      5202 days (14.24 yr)  
   first obs. used      2005-10-26  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60051  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:53:28  

Additional Information
 Earth MOID = .775916 au 
 Jupiter MOID = 2.6046 au 
 T_jup = 3.640 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457280.5 (2015-Sep-15.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1871955265057042 4.2963e-08  
q 1.787653365583527 9.7724e-08 au
tp 2456975.526673914806
(2014-Nov-14.02667391)
9.2357e-05 TDB
node 258.1554323282871 8.0387e-05 deg
peri 42.49586202977974 8.5313e-05 deg
i 4.191410658353228 7.3642e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      135  
   data-arc span      5202 days (14.24 yr)  
   first obs. used      2005-10-26  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60051  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:53:28  

Additional Information
 Jupiter MOID = 2.6046 au 
 T_jup = 3.640 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.84582590028872E-15 -4.131981156707393E-15 -1.142620044334667E-12 2.014668414129709E-14 -3.569299449958033E-13 -3.239005510066461E-15
q -4.131981156707393E-15 9.549949463165431E-15 3.51847969526968E-12 -4.602266926434E-14 1.100472851088262E-12 8.766749665522479E-15
tp -1.142620044334667E-12 3.51847969526968E-12 8.529824526466267E-9 -3.254600168206665E-11 2.669680744525576E-9 1.208906340713921E-11
node 2.014668414129709E-14 -4.602266926434E-14 -3.254600168206665E-11 6.462115373823193E-9 -6.453834389515097E-9 -2.726722522786628E-10
peri -3.569299449958033E-13 1.100472851088262E-12 2.669680744525576E-9 -6.453834389515097E-9 7.278320855694429E-9 2.75606793792453E-10
i -3.239005510066461E-15 8.766749665522479E-15 1.208906340713921E-11 -2.726722522786628E-10 2.75606793792453E-10 5.423191903428673E-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 17.8   n/a MPO460514  

393971 (2005 US291)          Discovered 2005-Oct-26 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-05-15

[ show close-approach data ]
Alternate Designations
 2005 US291 = 2008 QR31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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