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7346 Boulanger (1993 DQ2)
Classification: Main-belt Asteroid          SPK-ID: 2007346
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07741365846452573 2.0746e-08  
a 2.875618884901118 1.0377e-08 au
q 2.653006706671243 6.0864e-08 au
i 3.185007368539821 3.7366e-07 deg
node 118.8970389348329 2.0594e-05 deg
peri 255.1425467736771 2.1491e-05 deg
M 49.48787756493169 1.1839e-05 deg
tp 2459151.654715167829
(2020-Oct-29.15471517)
5.8783e-05 TDB
period 1781.129174997046
4.88
9.641e-06
2.64e-08
d
yr
n .2021189732073178 1.094e-09 deg/d
Q 3.098231063130994 1.118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2552  
   data-arc span      24080 days (65.93 yr)  
   first obs. used      1955-04-16  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47183  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:27:04  

Additional Information
 Earth MOID = 1.6548 au 
 Jupiter MOID = 2.30173 au 
 T_jup = 3.290 
[ 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 12.90   n/a E2021B10  
diameter diameter 7.378 km 0.081 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.270   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7346 Boulanger           Discovered 1993 Feb. 20 by E. W. Elst at Caussols.
Nicolas Boulanger (1722-1759), a geologist and one of the Encyclopedists, believed that the irrational behavior of the human species, together with all the heritage of religious rites and much of the political of his own and other ages, were engendered in cataclysmic experiences.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1993 DQ2 = 1981 UC16 = 1986 TK5 = 1986 TX10 = 1990 RN18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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