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39861 (1998 DO8)
Classification: Main-belt Asteroid          SPK-ID: 2039861
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1003435707143787 4.5801e-08  
a 2.449450520759695 1.421e-08 au
q 2.203663909218473 1.0659e-07 au
i 5.515209867296011 3.8765e-06 deg
node 306.9245949213488 4.8936e-05 deg
peri 7.130683572381976 5.6925e-05 deg
M 141.8619999157653 3.3196e-05 deg
tp 2458448.721199452094
(2018-Nov-26.22119945)
0.0001264 TDB
period 1400.236626546887
3.83
1.2184e-05
3.336e-08
d
yr
n .257099402468705 2.2372e-09 deg/d
Q 2.695237132300917 1.5635e-08 au
  Orbit Determination Parameters
   # obs. used (total)      922  
   data-arc span      10437 days (28.57 yr)  
   first obs. used      1991-07-02  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50419  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:37:32  

Additional Information
 Earth MOID = 1.18974 au 
 Jupiter MOID = 2.53303 au 
 T_jup = 3.483 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4   n/a MPO358991  
diameter diameter 2.016 km 0.295 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.361   0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39861 (1998 DO8)          Discovered 1998-Feb-21 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 DO8 = 2000 WB119 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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