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21229 Susil (1995 SM1)
Classification: Main-belt Asteroid          SPK-ID: 2021229
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08397471782818862 7.5752e-08  
a 2.635665803670892 2.0922e-08 au
q 2.414336511518223 2.1075e-07 au
i 1.140586450165231 4.4604e-06 deg
node 84.78599361429906 0.00036294 deg
peri 268.4761338527582 0.00036388 deg
M 341.7937188555806 2.7277e-05 deg
tp 2459279.541046892180
(2021-Mar-06.04104689)
0.00011866 TDB
period 1562.9098911233
4.28
1.861e-05
5.095e-08
d
yr
n .2303395749458464 2.7427e-09 deg/d
Q 2.856995095823561 2.2679e-08 au
  Orbit Determination Parameters
   # obs. used (total)      504  
   data-arc span      9120 days (24.97 yr)  
   first obs. used      1995-09-22  
   last obs. used      2020-09-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5284  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:41:58  

Additional Information
 Earth MOID = 1.40745 au 
 Jupiter MOID = 2.48991 au 
 T_jup = 3.392 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.88   n/a E2021B10  
diameter diameter 3.945 km 1.401 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.11 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
geometric albedo albedo 0.054   0.040 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21229 Sušil           Discovered 1995 Sept. 22 by L. Šarounová at Ondřejov.
František Sušil (1804-1868), a great collector of Moravian folk songs, published almost 2400 songs in his compilation Moravské národní písně ("Moravian Folk Songs"). By walking the length and breadth of Moravia, he was able to record both lyrics and music directly from the local people. The name was suggested by L. Vašta.
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

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