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18841 Hruska (1999 RL3)
Classification: Main-belt Asteroid          SPK-ID: 2018841
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07962501639873644 1.3791e-08  
a 2.587820370596097 8.4225e-09 au
q 2.381765131150399 3.6161e-08 au
i 15.38992740923946 9.0853e-07 deg
node 36.10480122263779 2.2258e-06 deg
peri 69.6039927432314 1.0921e-05 deg
M .2275694401863058 1.0472e-05 deg
tp 2459199.538805984788
(2020-Dec-16.03880598)
4.4233e-05 TDB
period 1520.546191056547
4.16
7.4233e-06
2.032e-08
d
yr
n .2367570298866455 1.1559e-09 deg/d
Q 2.793875610041796 9.0932e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2603  
   data-arc span      12616 days (34.54 yr)  
   first obs. used      1986-09-01  
   last obs. used      2021-03-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38638  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:39:19  

Additional Information
 Earth MOID = 1.44234 au 
 Jupiter MOID = 2.38025 au 
 T_jup = 3.366 
[ 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 13.2   n/a MPO502311  
diameter diameter 7.255 km 0.228 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.212   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18841 Hruška           Discovered 1999 Sept. 6 by J. Ticha and M. Tichy at Klet.
As a consequence of difficult experiences in his life, Luboš Hruška (b. 1927) turned his family orchard in Plzeň into a wonderful garden of meditation as a memorial to the victims of evil.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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