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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08491135739190037 1.8892e-08  
a 3.102187982945607 1.6506e-08 au
q 2.838776990428854 6.3698e-08 au
i 16.07639581699969 8.8329e-07 deg
node 352.4212271929882 4.0802e-06 deg
peri 16.41682547793426 1.1241e-05 deg
M 245.5552663799519 1.2133e-05 deg
tp 2460030.944892463535
(2023-Mar-27.44489246)
6.8592e-05 TDB
period 1995.724521891519
5.46
1.5928e-05
4.361e-08
d
yr
n .1803856173790946 1.4397e-09 deg/d
Q 3.365598975462361 1.7907e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2368  
   data-arc span      32649 days (89.39 yr)  
   first obs. used      1932-02-05  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41304  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:35:45  

Additional Information
 Earth MOID = 1.83861 au 
 Jupiter MOID = 2.09277 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 11.94   n/a MPCxxxxx  
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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