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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 ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .26851267380738 1.5758e-07  
a 2.566365006708035 2.6326e-08 au
q 1.877263476791166 4.1648e-07 au
i 11.80880939015837 7.7492e-06 deg
node 126.6115302102848 3.6368e-05 deg
peri 265.6412741791376 4.1741e-05 deg
M 254.2062364611709 1.623e-05 deg
tp 2458041.799698322813
(2017-Oct-15.29969832)
6.4873e-05 JED
period 1501.675392594422
4.11
2.3106e-05
6.326e-08
d
yr
n .2397322362578197 3.6887e-09 deg/d
Q 3.255466536624904 3.3394e-08 au
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7759 days (21.24 yr)  
   first obs. used      1994-02-06  
   last obs. used      2015-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61379  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 20:34:26  

Additional Information
 Earth MOID = .924861 au 
 Jupiter MOID = 2.31904 au 
 T_jup = 3.352 
[ 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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