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21074 Rugen (1991 RA4)
Classification: Main-belt Asteroid          SPK-ID: 2021074
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1183959056474963 3.2373e-08  
a 2.469735805443552 8.8272e-09 au
q 2.177329198048014 8.1178e-08 au
i 7.735670517907542 4.3943e-06 deg
node 213.9785804533453 2.1795e-05 deg
peri 29.11392566221954 2.9597e-05 deg
M 353.3450270967403 1.7954e-05 deg
tp 2459422.707039585144
(2021-Jul-27.20703958)
7.0653e-05 TDB
period 1417.666816649346
3.88
7.6004e-06
2.081e-08
d
yr
n .2539383695605288 1.3614e-09 deg/d
Q 2.76214241283909 9.8723e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2184  
   data-arc span      10882 days (29.79 yr)  
   first obs. used      1991-09-12  
   last obs. used      2021-06-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50153  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:04:58  

Additional Information
 Earth MOID = 1.16892 au 
 Jupiter MOID = 2.24279 au 
 T_jup = 3.463 
[ 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 14.21   n/a MPCxxxxx  
diameter diameter 4.297 km 0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.182   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21074 Rügen           Discovered 1991 Sept. 12 by F. Borngen and L. D. Schmadel at Tautenburg.
Rügen is the largest German island in the Baltic. Off the Pomeranian coast, it is characterized by bights and sand bars. Since 1936 it was been connected to the continent by a dam 2.5 km long. The chalk cliffs Kap Arcona and Stubbenkammer are quite remarkable. The name was suggested by the first discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1991 RA4 = 1995 UZ41 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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