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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1766476077377185 1.2003e-07  
a 2.413682257176071 5.566e-08 AU
q 1.987311060606942 2.8028e-07 AU
i 4.330955594119016 2.1964e-05 deg
node 319.3627359428106 0.00011666 deg
peri 255.5914060556171 0.00013445 deg
M 129.2958226819915 6.197e-05 deg
tp 2456508.573105448854
(2013-Aug-04.07310545)
0.00024045 JED
period 1369.678295593368
3.75
4.7378e-05
1.297e-07
d
yr
n .262835441839313 9.0916e-09 deg/d
Q 2.840053453745201 6.5493e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      93  
   data-arc span      6050 days (16.56 yr)  
   first obs. used      1998-02-21  
   last obs. used      2014-09-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .67374  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 21:11:59  

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 17.5 mag n/a MPO310794  

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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