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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2635491437649588 3.6867e-08  
a 2.254058641936366 6.5799e-09 au
q 1.660003416858031 8.4373e-08 au
i 3.211825232604562 4.689e-06 deg
node 169.1640791235279 6.3097e-05 deg
peri 233.130384225721 6.3578e-05 deg
M 309.1971451054139 8.9849e-06 deg
tp 2459374.934289363686
(2021-Jun-09.43428936)
3.1295e-05 TDB
period 1236.079041251263
3.38
5.4124e-06
1.482e-08
d
yr
n .2912435111233483 1.2753e-09 deg/d
Q 2.848113867014701 8.314e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1376  
   data-arc span      14514 days (39.74 yr)  
   first obs. used      1980-10-13  
   last obs. used      2020-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53361  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:27:42  

Additional Information
 Earth MOID = .669926 au 
 Jupiter MOID = 2.56897 au 
 T_jup = 3.576 
[ 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 15.31   n/a E2021B10  
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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