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24699 Schwekendiek (1990 TJ7)
Classification: Main-belt Asteroid          SPK-ID: 2024699
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2112748690037529 4.8369e-08  
a 2.444794992833012 1.2098e-08 au
q 1.928271250981187 1.1656e-07 au
i 3.600357578495256 5.2577e-06 deg
node 200.8886733548776 6.0511e-05 deg
peri 178.9321126971786 6.1153e-05 deg
M 329.8086553488211 1.1427e-05 deg
tp 2459317.595998197479
(2021-Apr-13.09599820)
4.4905e-05 TDB
period 1396.246501708776
3.82
1.0364e-05
2.838e-08
d
yr
n .2578341285435052 1.9138e-09 deg/d
Q 2.961318734684838 1.4654e-08 au
  Orbit Determination Parameters
   # obs. used (total)      744  
   data-arc span      24654 days (67.50 yr)  
   first obs. used      1953-01-09  
   last obs. used      2020-07-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58734  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:47:25  

Additional Information
 Earth MOID = .929382 au 
 Jupiter MOID = 2.50051 au 
 T_jup = 3.466 
[ 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 15.59   n/a E2021B10  
diameter diameter 1.704 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.221   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

24699 Schwekendiek           Discovered 1990 Oct. 13 by L. D. Schmadel and F. Börngen at Tautenburg.
Peter Schwekendiek (b. 1954) is a German astrophysicist who worked on dynamics of galactic clusters. As a member of the Astronomisches Rechen-Institut he contributed to the Hipparcos astrometry space mission. 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: 20070402/MPCPages.arcLast Updated: 2007-07-05

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Alternate Designations
 1990 TJ7 = 2000 GV40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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