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JPL Small-Body Database Browser
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305318 (2008 AU54)
Classification: Main-belt Asteroid          SPK-ID: 2305318
[ 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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01436094617316428 8.6576e-08  
a 3.090701408444174 4.0405e-08 au
q 3.046316011880184 2.7079e-07 au
i 8.999362754975509 7.6143e-06 deg
node 305.3289575751112 4.2665e-05 deg
peri 240.8682777456531 0.0002478 deg
M 36.06169766189286 0.00024763 deg
tp 2458801.694832304349
(2019-Nov-14.19483230)		 0.0013648 TDB
period 1984.650335695751
5.43		 3.8918e-05
1.066e-07		 d
yr
n .1813921543382584 3.557e-09 deg/d
Q 3.135086805008164 4.0985e-08 au
   Orbit Determination Parameters
   # obs. used (total)      282  
   data-arc span      6730 days (18.43 yr)  
   first obs. used      2000-09-23  
   last obs. used      2019-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55501  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:18:57  

Additional Information
 Earth MOID = 2.06218 au 
 Jupiter MOID = 1.90961 au 
 T_jup = 3.206 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457026.5 (2015-Jan-04.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01490380676591963 8.8779e-08  
q 3.044847285537093 2.7811e-07 au
tp 2456784.468192922893
(2014-May-06.96819292)		 0.0012377 TDB
node 305.3534058693032 4.2668e-05 deg
peri 235.1762472281754 0.00022614 deg
i 8.998906951141958 7.6137e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      282  
   data-arc span      6730 days (18.43 yr)  
   first obs. used      2000-09-23  
   last obs. used      2019-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55501  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:18:57  

Additional Information
 Jupiter MOID = 1.90961 au 
 T_jup = 3.206 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.88170717768089E-15 -2.44335159382894E-14 -4.141958999321697E-11 1.904083462548573E-14 -7.183622911489381E-12 1.014501103824075E-14
q -2.44335159382894E-14 7.734403019920393E-14 1.319744043868898E-10 -5.158498088067061E-14 2.294399166807374E-11 -2.937738132639359E-14
tp -4.141958999321697E-11 1.319744043868898E-10 1.531973880416006E-6 3.163868704885636E-10 2.749083171210684E-7 9.152107766797276E-11
node 1.904083462548573E-14 -5.158498088067061E-14 3.163868704885636E-10 1.820519442940266E-9 -1.739322740393233E-9 9.953211738678608E-11
peri -7.183622911489381E-12 2.294399166807374E-11 2.749083171210684E-7 -1.739322740393233E-9 5.113880405739742E-8 -8.12719786152326E-11
i 1.014501103824075E-14 -2.937738132639359E-14 9.152107766797276E-11 9.953211738678608E-11 -8.12719786152326E-11 5.796910527561985E-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 15.6   n/a MPO471205  

305318 (2008 AU54)          Discovered 2008-Jan-11 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Alternate Designations
 2008 AU54 = 2003 EJ7 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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