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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2175693724120499 3.9409e-08  
a 2.410218856087272 1.0233e-08 au
q 1.885829052192675 9.2819e-08 au
i 1.26751772350328 3.6609e-06 deg
node 318.0346629985469 0.00021251 deg
peri 22.97590917408696 0.00021276 deg
M 185.804238884341 1.346e-05 deg
tp 2459861.830006605000
(2022-Oct-09.33000661)
5.37e-05 TDB
period 1366.731319137698
3.74
8.704e-06
2.383e-08
d
yr
n .263402173462398 1.6775e-09 deg/d
Q 2.934608659981869 1.2459e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1234  
   data-arc span      30822 days (84.39 yr)  
   first obs. used      1936-08-28  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56582  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:36:03  

Additional Information
 Earth MOID = .875658 au 
 Jupiter MOID = 2.46737 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 14.94   n/a E2021B10  
diameter diameter 2.596 km 0.879 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.262   0.180 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 ]
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