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56081 (1999 AU8)
Classification: Main-belt Asteroid          SPK-ID: 2056081
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0580231444394901 3.6069e-08  
a 2.376329045389468 1.0165e-08 au
q 2.238446961953079 8.1961e-08 au
i 6.521386216346709 3.4182e-06 deg
node 266.4514167248241 3.4127e-05 deg
peri 21.45058573249176 5.0016e-05 deg
M 129.0161366999937 3.4943e-05 deg
tp 2458520.987620566562
(2019-Feb-06.48762057)
0.00013019 TDB
period 1338.006709947053
3.66
8.585e-06
2.35e-08
d
yr
n .2690569466682613 1.7263e-09 deg/d
Q 2.514211128825857 1.0755e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1021  
   data-arc span      8026 days (21.97 yr)  
   first obs. used      1998-10-29  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53654  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:01:00  

Additional Information
 Earth MOID = 1.22336 au 
 Jupiter MOID = 2.57266 au 
 T_jup = 3.530 
[ show covariance matrix ]

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 15.3   n/a MPO493266  
diameter diameter 3.915 km 0.248 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.139   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

56081 (1999 AU8)          Discovered 1999-Jan-10 by McClusky, J. V. at Fair Oaks Ranch
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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