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7704 Dellen (1992 EB7)
Classification: Main-belt Asteroid          SPK-ID: 2007704
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06270118943043275 3.5999e-08  
a 2.654092586815092 1.311e-08 au
q 2.487677824763292 9.6582e-08 au
i 6.71787131288571 4.0419e-06 deg
node 90.82546702017559 3.9201e-05 deg
peri 185.6392431561678 5.3819e-05 deg
M 81.69099417115451 3.7125e-05 deg
tp 2458642.119632107709
(2019-Jun-07.61963211)
0.00016271 TDB
period 1579.328709978916
4.32
1.1702e-05
3.204e-08
d
yr
n .2279449475751036 1.6889e-09 deg/d
Q 2.820507348866893 1.3932e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1557  
   data-arc span      10515 days (28.79 yr)  
   first obs. used      1990-11-14  
   last obs. used      2019-08-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56522  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 00:58:53  

Additional Information
 Earth MOID = 1.47138 au 
 Jupiter MOID = 2.24796 au 
 T_jup = 3.376 
[ 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 13.8   n/a MPO439136  
diameter diameter 4.812 km 0.215 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.304   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7704 Dellen           Discovered 1992 Mar. 1 at the European Southern Observatory in the course of the Uppsala-ESO Survey of Asteroids and Comets.
Dellen, two connected lakes in the Swedish province of Hälsingland, are appreciated among fly-fishermen for their unique population of salmon trout. This 15-km-wide lake system was formed approximately 110 million years ago, as the result of a meteorite impact.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000320/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1992 EB7 = 1990 WG4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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