Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05328409927069713 2.9848e-08  
a 2.560085624892552 1.0962e-08 au
q 2.423673768314293 7.7937e-08 au
i 5.440672019206149 4.4099e-06 deg
node 150.305686964145 3.4743e-05 deg
peri 75.03989599019053 5.6528e-05 deg
M 135.1999914000089 4.3732e-05 deg
tp 2458438.606088038079
(2018-Nov-16.10608804)
0.00018141 TDB
period 1496.16731637069
4.10
9.6097e-06
2.631e-08
d
yr
n .2406148002706446 1.5454e-09 deg/d
Q 2.696497481470811 1.1546e-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 = 1.42155 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 34 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:00 2019-Dec-13 23:19
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 34 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:00 2019-Dec-13 23:19

Alternate Designations
 1998 HZ99 = 1977 EC3 = 1989 CY7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Aug-13 18:28 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin