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8737 Takehiro (1997 AL13)
Classification: Main-belt Asteroid          SPK-ID: 2008737
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1170387574366149 4.3068e-08  
a 3.115884641953432 2.0444e-08 au
q 2.75120537514337 1.3795e-07 au
i 11.50809113505689 5.7233e-06 deg
node 348.4909791720111 2.2287e-05 deg
peri 289.7644889129598 3.3269e-05 deg
M 301.9716380679887 2.6756e-05 deg
tp 2459324.323448304999
(2021-Apr-19.82344831)
0.00014998 TDB
period 2008.956267391897
5.50
1.9772e-05
5.413e-08
d
yr
n .1791975295048934 1.7637e-09 deg/d
Q 3.480563908763493 2.2837e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1754  
   data-arc span      13302 days (36.42 yr)  
   first obs. used      1983-09-03  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43976  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 19:02:17  

Additional Information
 Earth MOID = 1.76232 au 
 Jupiter MOID = 1.84506 au 
 T_jup = 3.176 
[ 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 12.3   n/a MPO384834  
diameter diameter 17.785 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.033   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

8737 Takehiro           Discovered 1997 Jan. 11 by T. Kobayashi at Oizumi.
Takehiro Hayashi (b. 1951) is a professor at Hiroshima University. His main research field is education in astronomy and earth science, and he has given children, students and adults alike many opportunities to observe celestial objects with telescopes.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080618/MPCPages.arcLast Updated: 2008-06-20

[ show close-approach data ]
Alternate Designations
 1997 AL13 = 1983 RB6 = 1992 DN11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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