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JPL Small-Body Database Browser
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11991 (1995 WK7)
Classification: Main-belt Asteroid          SPK-ID: 2011991
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .002672471328516174 4.5803e-08  
a 2.736295714139587 1.3659e-08 au
q 2.728983042297207 1.2397e-07 au
i 6.254118392332643 3.7072e-06 deg
node 66.14963088020041 3.9496e-05 deg
peri 331.7980341205242 0.00082603 deg
M 96.87093763564674 0.00082317 deg
tp 2458155.629124269999
(2018-Feb-06.12912427)
0.0037811 TDB
period 1653.266905139017
4.53
1.2379e-05
3.389e-08
d
yr
n .2177506843456283 1.6304e-09 deg/d
Q 2.743608385981966 1.3695e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1579  
   data-arc span      11387 days (31.18 yr)  
   first obs. used      1988-03-18  
   last obs. used      2019-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52642  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 19:15:08  

Additional Information
 Earth MOID = 1.72563 au 
 Jupiter MOID = 2.23779 au 
 T_jup = 3.343 
[ 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 13.8   n/a MPO337360  
diameter diameter 8.393 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.089   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11991 (1995 WK7)          Discovered 1995-Nov-27 by Kobayashi, T. at Oizumi
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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