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21257 Jizni Cechy (1996 DS2)
Classification: Main-belt Asteroid          SPK-ID: 2021257
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01956805635240629 3.3694e-08  
a 2.944926875815292 1.5689e-08 au
q 2.887300380755623 1.0274e-07 au
i 12.75173614132979 3.8842e-06 deg
node 142.7634260734926 1.7663e-05 deg
peri 299.7798589408818 0.00011893 deg
M 65.81486141298645 0.00011525 deg
tp 2459059.032720481740
(2020-Jul-28.53272048)
0.00059162 TDB
period 1845.90862942396
5.05
1.4751e-05
4.039e-08
d
yr
n .1950259044578727 1.5585e-09 deg/d
Q 3.002553370874962 1.5996e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1334  
   data-arc span      10121 days (27.71 yr)  
   first obs. used      1993-07-24  
   last obs. used      2021-04-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5068  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:31:42  

Additional Information
 Earth MOID = 1.92057 au 
 Jupiter MOID = 2.04146 au 
 T_jup = 3.234 
[ 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 14.36   n/a MPCxxxxx  
diameter diameter 8.303 km 0.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21257 Jižní Čechy           Discovered 1996 Feb. 26 at Klet.
Jižní Čechy (South Bohemia) is a region of the Czech Republic known for its pleasant landscape, historical towns and castles, picturesque rivers and ponds. There the Klet Observatory is situated. The name was suggested by J. Ticha and M. Tichy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1996 DS2 = 1999 TS163 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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