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18331 (1987 DQ6)
Classification: Main-belt Asteroid          SPK-ID: 2018331
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08473784717187355 1.8893e-08  
a 3.102519847304234 1.6709e-08 au
q 2.839618994635663 6.3792e-08 au
i 16.07598898705256 8.8361e-07 deg
node 352.4192682724092 4.0802e-06 deg
peri 16.42125509759804 1.1266e-05 deg
M 210.1852962304229 1.2093e-05 deg
tp 2460031.157936017599
(2023-Mar-27.65793602)
6.8729e-05 TDB
period 1996.044776928372
5.46
1.6124e-05
4.415e-08
d
yr
n .180356675441915 1.457e-09 deg/d
Q 3.365420699972805 1.8124e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2287  
   data-arc span      32537 days (89.08 yr)  
   first obs. used      1932-02-05  
   last obs. used      2021-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41484  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 01:52:35  

Additional Information
 Earth MOID = 1.83868 au 
 Jupiter MOID = 2.09253 au 
 T_jup = 3.156 
[ 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 11.93   n/a E2021B10  
diameter diameter 27.533 km 0.324 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.028   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18331 (1987 DQ6)          Discovered 1987-Feb-24 by Debehogne, H. at La Silla
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 DQ6 = 1932 CM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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