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21801 Ancerl (1999 TW3)
Classification: Main-belt Asteroid          SPK-ID: 2021801
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09239802676415428 3.6821e-08  
a 2.39299671286228 7.6318e-09 au
q 2.171888538540697 8.8323e-08 au
i 5.377785046283669 4.0037e-06 deg
node 65.48480231636205 3.0618e-05 deg
peri 6.259277531698238 3.5157e-05 deg
M 162.3744953879001 1.7994e-05 deg
tp 2458390.644572000704
(2018-Sep-29.14457200)
6.6363e-05 TDB
period 1352.108615058439
3.70
6.4683e-06
1.771e-08
d
yr
n .266250799669996 1.2737e-09 deg/d
Q 2.614104887183862 8.337e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2102  
   data-arc span      17119 days (46.87 yr)  
   first obs. used      1973-09-29  
   last obs. used      2020-08-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46282  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:54:54  

Additional Information
 Earth MOID = 1.18647 au 
 Jupiter MOID = 2.59789 au 
 T_jup = 3.519 
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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 14.3   n/a MPO333020  
diameter diameter 4.103 km 0.357 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.240   0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21801 Ančerl           Discovered 1999 Oct. 2 by L. Šarounová at Ondřejov.
Karel Ančerl (1908-1973) was the head conductor of the Czech Philharmonic Orchestra during 1950-1968. He brought the orchestra to the highest standard by his demands and consistent work. He was an excellent interpreter of the music of the twentieth century and made some of Prague's best recordings.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1999 TW3 = 1992 WO9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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