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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06256797051426395 3.2381e-08  
a 2.654415216311711 1.1063e-08 au
q 2.488333843324906 8.3635e-08 au
i 6.717746256409369 3.4418e-06 deg
node 90.82711446892797 3.438e-05 deg
peri 185.7238337695812 4.8399e-05 deg
M 127.2010078363028 3.5389e-05 deg
tp 2458642.364346708808
(2019-Jun-07.86434671)
0.0001543 TDB
period 1579.616691743574
4.32
9.8754e-06
2.704e-08
d
yr
n .2279033906653857 1.4248e-09 deg/d
Q 2.820496589298515 1.1755e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2005  
   data-arc span      11020 days (30.17 yr)  
   first obs. used      1990-11-14  
   last obs. used      2021-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51224  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:38:52  

Additional Information
 Earth MOID = 1.47019 au 
 Jupiter MOID = 2.24696 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 13.78   n/a E2021B10  
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

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