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7221 Sallaba (1981 SJ)
Classification: Main-belt Asteroid          SPK-ID: 2007221
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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2174256159870433 3.9605e-08  
a 2.410435184954859 1.031e-08 au
q 1.886344830069206 9.328e-08 au
i 1.267521426927173 3.6756e-06 deg
node 318.0345945792655 0.00021723 deg
peri 22.9603374913786 0.00021748 deg
M 133.1565135316152 1.3279e-05 deg
tp 2458494.906445662117
4.8658e-05 TDB
period 1366.915329443666
n .2633667150009356 1.6897e-09 deg/d
Q 2.934525539840512 1.2551e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1197  
   data-arc span      30445 days (83.35 yr)  
   first obs. used      1936-08-28  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56984  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 20:45:39  

Additional Information
 Earth MOID = .878016 au 
 Jupiter MOID = 2.46698 au 
 T_jup = 3.487 
[ 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 14.9   n/a MPO448985  
diameter diameter 2.596 km 0.879 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.262   0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7221 Sallaba           Discovered 1981 Sept. 22 by Z. Vavrova at Klet.
Jan Sallaba (1775-1827) was the builder and, from 1821, chief construction manager of the Schwarzenberg court in Cesky Krumlov. He designed and built Joseph's look-out tower at the top of Klet mountain, which opened in 1825, as well as gloriets in Cesky Krumlov and Zlata Koruna. The name was suggested by J. Ticha.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-02-22Last Updated: 2016-02-25

Alternate Designations
 1981 SJ = 1936 QH1 = 1992 OS8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Feb-19 23:33 UT
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