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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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .267965343249653 1.5772e-07  
a 2.567589077972555 2.7085e-08 AU
q 1.87956418936958 4.1727e-07 AU
i 11.80922106980825 7.7499e-06 deg
node 126.6212885025048 3.635e-05 deg
peri 265.7372562231378 4.1723e-05 deg
M 110.2474096010058 1.7367e-05 deg
tp 2456540.293657781559
(2013-Sep-04.79365778)
7.6869e-05 JED
period 1502.749894970116
4.11
2.3779e-05
6.51e-08
d
yr
n .2395608219338183 3.7907e-09 deg/d
Q 3.255613966575531 3.4343e-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 = .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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