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JPL Small-Body Database Browser
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6961 Ashitaka (1989 KA)
Classification: Main-belt Asteroid          SPK-ID: 2006961
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1910056072591504 3.3778e-08  
a 2.31905430478173 6.7196e-09 au
q 1.876101929029949 7.894e-08 au
i 4.758876242937172 3.8089e-06 deg
node 224.7866685186029 3.8983e-05 deg
peri 356.2490553081925 3.9848e-05 deg
M 299.4831460035697 9.4418e-06 deg
tp 2459217.339624624771
(2021-Jan-02.83962462)
3.42e-05 TDB
period 1289.926024071284
3.53
5.6064e-06
1.535e-08
d
yr
n .2790857718055509 1.213e-09 deg/d
Q 2.762006680533511 8.003e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2592  
   data-arc span      17881 days (48.96 yr)  
   first obs. used      1971-02-18  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49237  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:16:42  

Additional Information
 Earth MOID = .867889 au 
 Jupiter MOID = 2.21668 au 
 T_jup = 3.550 
[ 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 13.4   n/a MPO452266  
diameter diameter 4.578 km 0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.1457 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 37, 152-158.]
[Oey, J. (2011) Minor Planet Bull. 38, 221-223.]
geometric albedo albedo 0.253   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

6961 Ashitaka (1989 KA)          Discovered 1989-May-26 by Akiyama, M., Furuta, T. at Mishima
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1989 KA = 1936 HM = 1971 DO1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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