Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
JPL Small-Body Database Browser
Search: [ help ]  
8837 London (1989 TF4)
Classification: Main-belt Asteroid          SPK-ID: 2008837
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]
Orbit Diagram
[ switch to new HTML5 viewer ]

Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .123071661581714 3.4184e-08  
a 2.22400219873678 6.1928e-09 au
q 1.950290552776859 7.4633e-08 au
i 5.502106838457116 3.1243e-06 deg
node 162.074034737805 3.8908e-05 deg
peri 56.2126928133164 4.1257e-05 deg
M 243.4616492937423 1.4416e-05 deg
tp 2459392.663899187623
4.9001e-05 TDB
period 1211.438147630859
n .297167462246448 1.2412e-09 deg/d
Q 2.497713844696701 6.955e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1440  
   data-arc span      18907 days (51.76 yr)  
   first obs. used      1968-04-22  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54103  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:04:55  

Additional Information
 Earth MOID = .949676 au 
 Jupiter MOID = 2.47563 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 15.0   n/a MPO452295  
diameter diameter 2.443 km 0.692 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.356   0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

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 ]
FirstGov 2020-Aug-13 18:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin