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8837 London (1989 TF4)
Classification: Main-belt Asteroid          SPK-ID: 2008837
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1229648621474718 2.8633e-08  
a 2.224012391675326 5.3142e-09 au
q 1.950537014518701 6.3786e-08 au
i 5.502445723938801 3.0978e-06 deg
node 162.0697432718995 3.3258e-05 deg
peri 56.21588885798061 3.5667e-05 deg
M 302.8836242440895 1.2474e-05 deg
tp 2459392.703978134319
(2021-Jun-27.20397813)
4.2014e-05 TDB
period 1211.446475946865
3.32
4.3421e-06
1.189e-08
d
yr
n .2971654193129949 1.0651e-09 deg/d
Q 2.497487768831951 5.9677e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1691  
   data-arc span      19329 days (52.92 yr)  
   first obs. used      1968-04-22  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51231  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:06:04  

Additional Information
 Earth MOID = .948877 au 
 Jupiter MOID = 2.47471 au 
 T_jup = 3.631 
[ 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 15.00   n/a MPCxxxxx  
diameter diameter 2.443 km 0.692 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.356   0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8837 London           Discovered 1989 Oct. 7 by E. W. Elst at the European Southern Observatory.
London, on the River Thames, is the capital of England and the United Kingdom, founded by the Romans (Londinium) in the first century. It is a very pleasant city, known for its large green parks and spacious squares. The British Museum in London is known worldwide for its marvelous collections.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1989 TF4 = 1968 HN = 1991 CA6 = 1991 CO5 = 1992 RN3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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