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8821 (1987 DP6)
Classification: Main-belt Asteroid          SPK-ID: 2008821
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09757668791216023 3.7004e-08  
a 2.986683770576014 1.5929e-08 au
q 2.695253060402205 1.0875e-07 au
i 6.122112171031713 4.7449e-06 deg
node 143.9000052249634 4.4848e-05 deg
peri 326.6113027012501 5.4687e-05 deg
M 135.6432571035057 2.9688e-05 deg
tp 2457890.140817472106
(2017-May-16.64081747)
0.0001556 TDB
period 1885.30791114004
5.16
1.5082e-05
4.129e-08
d
yr
n .1909502410045631 1.5276e-09 deg/d
Q 3.278114480749824 1.7483e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1560  
   data-arc span      11760 days (32.20 yr)  
   first obs. used      1987-02-23  
   last obs. used      2019-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49893  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:37:32  

Additional Information
 Earth MOID = 1.7146 au 
 Jupiter MOID = 1.81515 au 
 T_jup = 3.242 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO347595  
diameter diameter 9.497 km 0.266 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.163   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8821 (1987 DP6)          Discovered 1987-Feb-23 by Debehogne, H. at La Silla
Reference: 19980610/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1987 DP6 = 1990 UR3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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