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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2679651941100773 2.2666e-07  
a 2.567589117354889 5.3017e-08 AU
q 1.879564601127964 6.1462e-07 AU
i 11.80922973249073 9.4781e-06 deg
node 126.6212652770627 4.06e-05 deg
peri 265.7372432295328 6.287e-05 deg
M 110.2474366803527 3.5699e-05 deg
tp 2456540.293534155953
(2013-Sep-04.79353416)
0.00016187 JED
period 1502.749929544456
4.11
4.6544e-05
1.274e-07
d
yr
n .2395608164221512 7.4198e-09 deg/d
Q 3.255613633581814 6.7223e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      384  
   data-arc span      7598 days (20.80 yr)  
   first obs. used      1994-02-06  
   last obs. used      2014-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5969  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 07:14:37  

Additional Information
 Earth MOID = .928243 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 (327)
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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