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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08159762517590713 4.0328e-08  
a 2.483755603988237 9.7706e-09 au
q 2.281087045185446 1.0413e-07 au
i 7.461887963176979 3.9492e-06 deg
node 320.5495925454436 2.6943e-05 deg
peri 235.4410064986414 3.4961e-05 deg
M 328.3391643992061 2.5017e-05 deg
tp 2459522.242354680028
(2021-Nov-03.74235468)
9.9667e-05 TDB
period 1429.755305753052
3.91
8.4365e-06
2.31e-08
d
yr
n .2517913369871273 1.4857e-09 deg/d
Q 2.686424162791028 1.0568e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1778  
   data-arc span      9952 days (27.25 yr)  
   first obs. used      1994-02-08  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46561  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:54:55  

Additional Information
 Earth MOID = 1.29116 au 
 Jupiter MOID = 2.31019 au 
 T_jup = 3.460 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457046.5 (2015-Jan-24.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08135193056324515 4.0354e-08  
q 2.281679911775845 1.0412e-07 au
tp 2456665.386206451109
(2014-Jan-07.88620645)
9.4373e-05 TDB
node 320.6283486219736 2.6938e-05 deg
peri 235.9585291813871 3.5036e-05 deg
i 7.462488176728516 3.9502e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1778  
   data-arc span      9952 days (27.25 yr)  
   first obs. used      1994-02-08  
   last obs. used      2021-05-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46561  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 17:54:55  

Additional Information
 Jupiter MOID = 2.31019 au 
 T_jup = 3.460 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.628413392625672E-15 -4.188836978509736E-15 -1.068116774113734E-12 -1.927266936221634E-14 -2.528559693795223E-13 -1.343323541064596E-15
q -4.188836978509736E-15 1.084184724690318E-14 2.876354741785201E-12 5.019726900432524E-14 6.834426065610972E-13 3.570958477352872E-15
tp -1.068116774113734E-12 2.876354741785201E-12 8.906301509040684E-9 2.766457611421523E-11 2.128199605281316E-9 -5.644326462373856E-13
node -1.927266936221634E-14 5.019726900432524E-14 2.766457611421523E-11 7.25664472534485E-10 -7.12216258800652E-10 3.014914350334276E-11
peri -2.528559693795223E-13 6.834426065610972E-13 2.128199605281316E-9 -7.12216258800652E-10 1.227522494226557E-9 -3.002197284449038E-11
i -1.343323541064596E-15 3.570958477352872E-15 -5.644326462373856E-13 3.014914350334276E-11 -3.002197284449038E-11 1.560384948643777E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.53   n/a MPCxxxxx  
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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