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17472 Dinah (1991 FY)
Classification: Main-belt Asteroid          SPK-ID: 2017472
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05566922983887108 3.2911e-08  
a 2.335923180166365 8.7039e-09 au
q 2.205884135763736 7.699e-08 au
i 8.359279346306 4.0319e-06 deg
node 137.6996368132284 2.546e-05 deg
peri 341.14477595 4.7097e-05 deg
M 114.5360848045187 3.917e-05 deg
tp 2458585.616565978542
(2019-Apr-12.11656598)
0.00014155 TDB
period 1304.026032517502
3.57
7.2884e-06
1.995e-08
d
yr
n .2760681083221919 1.543e-09 deg/d
Q 2.465962224568993 9.1884e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1672  
   data-arc span      12030 days (32.94 yr)  
   first obs. used      1987-01-30  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49937  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:28:51  

Additional Information
 Earth MOID = 1.22296 au 
 Jupiter MOID = 2.56287 au 
 T_jup = 3.551 
[ 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 14.0   n/a MPO365462  
diameter diameter 4.190 km 0.163 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.304   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17472 Dinah           Discovered 1991 Mar. 17 by T. Niijima and T. Urata at Ojima.
Dinah is Alice's cat in Lewis Carroll's Alice's adventures in Wonderland. The cat never appears in the story, but Alice thinks about her and talks about her to the creatures she meets in Wonderland, frightening some of them by telling how good Dinah is at catching mice and small birds.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1991 FY = 1987 BB3 = 1998 DR20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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