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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2177334427638661 3.8036e-08  
a 2.409812074343115 9.6086e-09 au
q 1.885115394982455 9.0131e-08 au
i 1.267439270412744 3.5024e-06 deg
node 318.0311784338629 0.00019876 deg
peri 23.00928572468162 0.00019902 deg
M 237.4030226551246 1.3647e-05 deg
tp 2459861.818643011295
(2022-Oct-09.31864301)
5.3651e-05 TDB
period 1366.385331123079
3.74
8.1722e-06
2.237e-08
d
yr
n .263468870603363 1.5758e-09 deg/d
Q 2.934508753703775 1.1701e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1364  
   data-arc span      30965 days (84.78 yr)  
   first obs. used      1936-08-28  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55227  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 15:24:51  

Additional Information
 Earth MOID = .875996 au 
 Jupiter MOID = 2.46749 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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