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JPL Small-Body Database Browser
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17776 Troska (1998 FF3)
Classification: Main-belt Asteroid          SPK-ID: 2017776
[ 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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08210046107664538 5.2102e-08  
a 2.482807042489654 1.119e-08 au
q 2.278967439536911 1.2947e-07 au
i 7.462047403450597 4.5716e-06 deg
node 320.5576841896863 3.2934e-05 deg
peri 235.635456757826 4.0259e-05 deg
M 127.6716249859905 2.6466e-05 deg
tp 2458093.737155689047
(2017-Dec-06.23715569)		 0.00010345 TDB
period 1428.936335477533
3.91		 9.6601e-06
2.645e-08		 d
yr
n .2519356468597969 1.7032e-09 deg/d
Q 2.686646645442397 1.2108e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1409  
   data-arc span      9425 days (25.80 yr)  
   first obs. used      1994-02-08  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49454  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:22:25  

Additional Information
 Earth MOID = 1.28864 au 
 Jupiter MOID = 2.31334 au 
 T_jup = 3.461 
[ 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 14.4   n/a MPO449081  
diameter diameter 4.682 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.126   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17776 Troska           Discovered 1998 Mar. 22 by P. Pravec at Ondřejov.
Jan Matzal, the pseudonym of J. M. Troska (1881-1961), was a great Czech writer of adventure science fiction in the 1930s. His greatest work, the trilogy Zápas s nebem ("Struggle with the Sky") describes a marvelous journey through the whole inner solar system, including visits to and being marooned on minor planets.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1998 FF3 = 1994 CZ7 = 1995 OQ1 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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