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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2679653509250533 1.6543e-07  
a 2.567589074013622 3.0565e-08 AU
q 1.879564166764229 4.3966e-07 AU
i 11.80922404129632 8.2772e-06 deg
node 126.6212787272402 3.75e-05 deg
peri 265.7372700732905 4.4874e-05 deg
M 110.2474069042784 1.9894e-05 deg
tp 2456540.293670102902
(2013-Sep-04.79367010)
8.873e-05 JED
period 1502.749891494509
4.11
2.6833e-05
7.346e-08
d
yr
n .239560822487882 4.2776e-09 deg/d
Q 3.255613981263015 3.8755e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      407  
   data-arc span      7721 days (21.14 yr)  
   first obs. used      1994-02-06  
   last obs. used      2015-03-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59766  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 21:11:05  

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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