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7251 Kuwabara (1992 SF13)
Classification: Main-belt Asteroid          SPK-ID: 2007251
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07801200170509451 3.3681e-08  
a 2.562002738007549 1.0471e-08 au
q 2.362135776041648 8.5421e-08 au
i 3.63062740566117 4.2289e-06 deg
node 194.4331320982827 5.5076e-05 deg
peri 261.4747252236632 6.1255e-05 deg
M 191.0993277274394 2.709e-05 deg
tp 2459703.243259373014
(2022-May-03.74325937)
0.00011311 TDB
period 1497.848232161153
4.10
9.1825e-06
2.514e-08
d
yr
n .2403447774415557 1.4734e-09 deg/d
Q 2.761869699973451 1.1288e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1754  
   data-arc span      16805 days (46.01 yr)  
   first obs. used      1974-04-24  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46709  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:44:03  

Additional Information
 Earth MOID = 1.38222 au 
 Jupiter MOID = 2.35679 au 
 T_jup = 3.427 
[ 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 13.7   n/a MPO344360  
diameter diameter 4.774 km 0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.309   0.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7251 Kuwabara           Discovered 1992 Sept. 30 by K. Endate and K. Watanabe at Kitami.
Named in honor of Syoji Kuwabara (b. 1927). A retired school teacher in Japan, he was superintendent of the board of education in Himeji City (1981-1993) and director of the city's Science Museum (1993-1996). An amateur astronomer, he was once an enthusiastic observer of occultations; now he studies local names and legends of stars and asterisms. Name proposed by the discoverers following a suggestion by T. Sato, A. Fujii and K. Kitao.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19981208/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 1992 SF13 = 1974 HQ1 = 1982 FY3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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