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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05328403406899691 2.9822e-08  
a 2.560085637752153 1.0791e-08 au
q 2.423673947410617 7.78e-08 au
i 5.440670969901253 4.357e-06 deg
node 150.3056746194214 3.4491e-05 deg
peri 75.03986285915649 5.5546e-05 deg
M 135.2000324732204 4.2923e-05 deg
tp 2458438.605913103290
(2018-Nov-16.10591310)
0.00017792 TDB
period 1496.167327643818
4.10
9.4601e-06
2.59e-08
d
yr
n .2406147984576914 1.5214e-09 deg/d
Q 2.696497328093688 1.1366e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1786  
   data-arc span      15851 days (43.40 yr)  
   first obs. used      1977-03-12  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52676  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:27:00  

Additional Information
 Earth MOID = 1.42155 au 
 Jupiter MOID = 2.28127 au 
 T_jup = 3.427 
[ 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 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1929-Dec-13 14:30 00:05 Psych 0.047223533252518 0.047214494547906 0.0472325720006748 2.48908045447052 2.48908035153725 2425959.103960826 5.42038151159071 454.761025603547 34.2946316185214 -8.80972328922493 35001.5983192441 T 35 CATAB v2.0f-lin.ifort 2020-Aug-25 00:27:12 2020-Aug-25 00:27
2038-Apr-14 17:32 < 00:01 Eunom 0.00855481381167685 0.00855118775045171 0.00855843987420323 6.89585120406242 6.89585096610708 2465528.230533969 0.333970564801656 180.83528955169 33.6603618424977 -1.73473304912976 7163.43611133941 T 35 CATAB v2.0f-lin.ifort 2020-Aug-25 00:27:12 2020-Aug-25 00:27

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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