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120771 (1998 DD8)
Classification: Main-belt Asteroid          SPK-ID: 2120771
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .267965292261737 1.8792e-07  
a 2.56758909062415 3.9662e-08 AU
q 1.879564329547002 5.0445e-07 AU
i 11.80922505772187 8.9845e-06 deg
node 126.6212783337116 3.9265e-05 deg
peri 265.7372550637887 5.2263e-05 deg
M 110.2474182566457 2.6365e-05 deg
tp 2456540.293618248829
(2013-Sep-04.79361825)
0.00011881 JED
period 1502.74990607714
4.11
3.482e-05
9.533e-08
d
yr
n .2395608201631924 5.5509e-09 deg/d
Q 3.255613851701298 5.0291e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      389  
   data-arc span      7681 days (21.03 yr)  
   first obs. used      1994-02-06  
   last obs. used      2015-02-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60123  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 19:03:08  

Additional Information
 Earth MOID = .928242 AU 
 T_jup = 3.351 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9 mag n/a MPO280592  

120771 (1998 DD8)          Discovered 1998-Feb-21 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 DD8 = 2001 XY86 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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