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JPL Small-Body Database Browser
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11720 Horodyskyj (1998 HZ99)
Classification: Main-belt Asteroid          SPK-ID: 2011720
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05339260050438863 2.977e-08  
a 2.561845724989821 1.1124e-08 au
q 2.425062119641564 7.795e-08 au
i 5.438346156638517 4.4079e-06 deg
node 150.3228037210648 3.4762e-05 deg
peri 75.80486185775533 5.6502e-05 deg
M 38.2140783257438 4.3626e-05 deg
tp 2458441.517700295314
(2018-Nov-19.01770030)
0.00018141 TDB
period 1497.710540231196
4.10
9.7546e-06
2.671e-08
d
yr
n .2403668735244583 1.5655e-09 deg/d
Q 2.698629330338079 1.1717e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1754  
   data-arc span      15590 days (42.68 yr)  
   first obs. used      1977-03-12  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52927  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:18:42  

Additional Information
 Earth MOID = 1.42281 au 
 Jupiter MOID = 2.28095 au 
 T_jup = 3.426 
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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 14.0   n/a MPO449027  
diameter diameter 4.205 km 0.114 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.209   0.051 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11720 Horodyskyj           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Ulyana N. Horodyskyj (b. 1986) is a finalist in the 2002 Intel International Science and Engineering Fair for her earth and space sciences project. She attends the Padua Franciscan High School, North Royalton, Ohio, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020724/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1998 HZ99 = 1977 EC3 = 1989 CY7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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