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8616 Fogelquist (1980 FY4)
Classification: Main-belt Asteroid          SPK-ID: 2008616
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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 2-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 has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1744759623429989 5.0883e-08  
a 2.330862707613825 1.207e-08 au
q 1.924183193613495 1.1739e-07 au
i 5.2518184048643 5.2826e-06 deg
node 186.3509496428555 4.9722e-05 deg
peri 163.7951901577143 5.1856e-05 deg
M 268.8020689312794 1.7875e-05 deg
tp 2457929.772872435326
6.6229e-05 JED
period 1299.790825160222
n .2769676420478069 2.1514e-09 deg/d
Q 2.737542221614155 1.4176e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1190  
   data-arc span      15220 days (41.67 yr)  
   first obs. used      1974-08-16  
   last obs. used      2016-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52159  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:02:57  

Additional Information
 Earth MOID = .918069 au 
 Jupiter MOID = 2.68608 au 
 T_jup = 3.545 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.5 mag n/a MPO337329  

8616 Fogelquist           Discovered 1980 Mar. 16 by C.-I. Lagerkvist at the European Southern Observatory.
Named in honor of Rune Fogelquist (b. 1924) for his inspiring activities in astronomy popularization within the Mariestad Astronomy Club, located near Lake Vänern in southern Sweden, and the building and running of the nearby Bifrost Observatory, the main instrument at which is a 0.60-m reflector. The observatory has about 1000 visitors annually. The naming commemorates the twentieth anniversary of the Mariestad Astronomy Club, celebrated in August 1998. Name proposed and citation prepared by H. Rickman.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980808/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 1980 FY4 = 1974 QB = 1985 VL4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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