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JPL Small-Body Database Browser
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8274 Soejima (1990 TJ1)
Classification: Main-belt Asteroid          SPK-ID: 2008274
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2019075528975129 3.8407e-08  
a 2.273319945660492 7.8699e-09 au
q 1.814319478479075 8.7153e-08 au
i 3.7294844253897 3.3651e-06 deg
node 76.7027426553791 6.1783e-05 deg
peri 314.7292955752119 6.227e-05 deg
M 113.5643272976287 8.4414e-06 deg
tp 2458205.562200239080
(2018-Mar-28.06220024)
2.8602e-05 TDB
period 1251.956589689588
3.43
6.5012e-06
1.78e-08
d
yr
n .2875499062545442 1.4932e-09 deg/d
Q 2.732320412841909 9.4589e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1824  
   data-arc span      27945 days (76.51 yr)  
   first obs. used      1942-11-05  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50209  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:34:21  

Additional Information
 Earth MOID = .821922 au 
 Jupiter MOID = 2.70349 au 
 T_jup = 3.581 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO319189  
diameter diameter 3.391 km 0.296 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.268   0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

8274 Soejima           Discovered 1990 Oct. 15 by K. Endate and K. Watanabe at Kitami.
Named in honor of Tsutomu Soejima (b. 1950), a Japanese amateur astronomer and secretary of the Saga Astronomical Society since 1989. He is a board member of the astronomical society's observatory, the Tara Observatory and the Saga City Observatory. His main interests are comet hunting and photography. Name proposed by the discoverers following a suggestion by Y. Yamada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 1990 TJ1 = 1942 VC = 1973 YS1 = 1997 XJ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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