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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .187019711651177 4.1886e-08  
a 2.199950060641253 2.0353e-08 au
q 1.788516034653136 9.501e-08 au
i 4.1918842675823 6.5894e-06 deg
node 258.0800111628814 7.7278e-05 deg
peri 42.59536281186806 8.1589e-05 deg
M 11.36363170303247 3.316e-05 deg
tp 2459358.878828995869
(2021-May-24.37882900)
0.00010937 TDB
period 1191.83918622363
3.26
1.654e-05
4.528e-08
d
yr
n .3020541732149858 4.1918e-09 deg/d
Q 2.611384086629369 2.416e-08 au
  Orbit Determination Parameters
   # obs. used (total)      149  
   data-arc span      5705 days (15.62 yr)  
   first obs. used      2005-10-26  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5891  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 16:34:55  

Additional Information
 Earth MOID = .775163 au 
 Jupiter MOID = 2.60186 au 
 T_jup = 3.639 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.88   n/a E2021B25  

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

Alternate Designations
 2005 US291 = 2008 QR31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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