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285250 (1998 DH8)
Classification: Main-belt Asteroid          SPK-ID: 2285250
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1766476114161956 1.2046e-07  
a 2.413682254336359 5.628e-08 AU
q 1.987311049390183 2.8202e-07 AU
i 4.330951016671913 2.2081e-05 deg
node 319.3627629549441 0.00011746 deg
peri 255.5913826356 0.00013553 deg
M 129.2958205360857 6.2212e-05 deg
tp 2456508.573114481433
(2013-Aug-04.07311448)
0.00024159 JED
period 1369.678293176215
3.75
4.7905e-05
1.312e-07
d
yr
n .2628354423031544 9.1929e-09 deg/d
Q 2.840053459282534 6.6222e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      89  
   data-arc span      6037 days (16.53 yr)  
   first obs. used      1998-02-21  
   last obs. used      2014-09-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .66667  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Sep-12 18:02:16  

Additional Information
 Earth MOID = .98772 AU 
 T_jup = 3.493 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.6 mag n/a MPO303050  

285250 (1998 DH8)          Discovered 1998-Feb-21 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

Alternate Designations
 1998 DH8 = 2009 BK115 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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