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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2174256152879165 3.9562e-08  
a 2.410435185180205 1.029e-08 au
q 1.886344831930755 9.3149e-08 au
i 1.267521436906341 3.6703e-06 deg
node 318.0345961108434 0.00021624 deg
peri 22.96033575080272 0.00021649 deg
M 133.1565135807084 1.3279e-05 deg
tp 2458494.906445404811
(2019-Jan-11.40644540)
4.8653e-05 TDB
period 1366.915329635351
3.74
8.7527e-06
2.396e-08
d
yr
n .2633667149640033 1.6864e-09 deg/d
Q 2.934525538429654 1.2527e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1209  
   data-arc span      30469 days (83.42 yr)  
   first obs. used      1936-08-28  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56817  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:24:09  

Additional Information
 Earth MOID = .878016 au 
 Jupiter MOID = 2.46698 au 
 T_jup = 3.487 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456285.5 (2012-Dec-24.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2190624059118041 3.9775e-08  
q 1.881223924474031 9.3801e-08 au
tp 2455762.348549842509
(2011-Jul-19.84854984)
4.1714e-05 TDB
node 318.2770362686701 0.00021569 deg
peri 22.69862127869254 0.00021593 deg
i 1.270370344551296 3.6743e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1209  
   data-arc span      30469 days (83.42 yr)  
   first obs. used      1936-08-28  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56817  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:24:09  

Additional Information
 Jupiter MOID = 2.46698 au 
 T_jup = 3.487 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.582070977208664E-15 -3.718768981268048E-15 6.181309079903631E-13 8.565520623535921E-15 1.078734333844857E-13 -3.521643576071346E-16
q -3.718768981268048E-15 8.798609690858448E-15 -1.430107526423736E-12 -2.030094469154161E-14 -2.418997352569921E-13 8.18216464091685E-16
tp 6.181309079903631E-13 -1.430107526423736E-12 1.740048648351156E-9 -6.503147235157469E-12 4.550572961230495E-10 -6.769988643607394E-13
node 8.565520623535921E-15 -2.030094469154161E-14 -6.503147235157469E-12 4.652180648707838E-8 -4.651151991192731E-8 3.465248026868658E-11
peri 1.078734333844857E-13 -2.418997352569921E-13 4.550572961230495E-10 -4.651151991192731E-8 4.662775102225941E-8 -3.481392237144866E-11
i -3.521643576071346E-16 8.18216464091685E-16 -6.769988643607394E-13 3.465248026868658E-11 -3.481392237144866E-11 1.350047258936966E-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 14.9   n/a MPO448985  
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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