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8251 Isogai (1980 VA)
Classification: Mars-crossing Asteroid          SPK-ID: 2008251
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2648088815989043 3.7029e-08  
a 2.252731691730745 6.5e-09 au
q 1.656188331901119 8.476e-08 au
i 3.211297539132014 4.7304e-06 deg
node 169.2518065869934 6.3608e-05 deg
peri 233.095743223083 6.409e-05 deg
M 134.3988966934016 8.5359e-06 deg
tp 2458139.441712519042
(2018-Jan-20.94171252)
2.8328e-05 TDB
period 1234.987693922742
3.38
5.3451e-06
1.463e-08
d
yr
n .2915008803500845 1.2616e-09 deg/d
Q 2.849275051560371 8.2212e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1364  
   data-arc span      14079 days (38.55 yr)  
   first obs. used      1980-10-13  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53194  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 18:54:40  

Additional Information
 Earth MOID = .666553 au 
 Jupiter MOID = 2.56495 au 
 T_jup = 3.577 
[ 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 15.3   n/a MPO337325  
diameter diameter 4.339 km 1.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.079   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

8251 Isogai           Discovered 1980 Nov. 8 by T. Furuta at Tokai.
Rensuke Isogai (b. 1941), a high-school classmate of the discoverer, is an electrical engineer and amateur astronomer. He influenced the discoverer in astronomy, who began to observe stars with a telescope borrowed from him.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1980 VA = 1980 VL = 1990 RX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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