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JPL Small-Body Database Browser
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20991 Jankollar (1984 WX1)
Classification: Main-belt Asteroid          SPK-ID: 2020991
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06813247921410179 3.5792e-08  
a 2.966475205192591 1.6963e-08 au
q 2.764361894935658 1.1147e-07 au
i 11.26082129118766 4.1064e-06 deg
node 126.5024653362446 2.0999e-05 deg
peri 333.3781740036235 3.8787e-05 deg
M 248.1400311177054 3.2611e-05 deg
tp 2459180.371420063033
(2020-Nov-26.87142006)
0.00017037 TDB
period 1866.205697253092
5.11
1.6007e-05
4.382e-08
d
yr
n .1929047802875597 1.6546e-09 deg/d
Q 3.168588515449524 1.8119e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1422  
   data-arc span      12782 days (35.00 yr)  
   first obs. used      1984-11-28  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54237  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 00:11:23  

Additional Information
 Earth MOID = 1.78595 au 
 Jupiter MOID = 1.93644 au 
 T_jup = 3.232 
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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 13.8   n/a MPO358830  
diameter diameter 7.069 km 0.178 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.128   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20991 Jánkollár           Discovered 1984 Nov. 28 by M. Antal at Piszkéstető.
Ján Kollár (1793-1852), a great Slovak poet and a herald of Slavonic mutuality, was author of the extensive poetic work Slávy dcera ("Daughter of sláva", 1824-1832) and the folk verbal arts collection Národnie zpievanky ("National songs"). His work belongs equally to the literary heritage of both the Czech and Slovak republics.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010804/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1984 WX1 = 1999 XC105 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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