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 ]  
17831 Ussery (1998 HW35)
Classification: Main-belt Asteroid          SPK-ID: 2017831
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06305127200367684 3.309e-08  
a 2.677997498155286 1.151e-08 au
q 2.509146349473931 8.9576e-08 au
i 2.390226155449622 4.1235e-06 deg
node 129.9835756055624 0.00010164 deg
peri 305.6021056196237 0.00010969 deg
M 134.7130931499993 4.2277e-05 deg
tp 2458401.508051680084
(2018-Oct-10.00805168)		 0.0001864 TDB
period 1600.713756569035
4.38		 1.0319e-05
2.825e-08		 d
yr
n .2248996727382558 1.4499e-09 deg/d
Q 2.846848646836642 1.2235e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1726  
   data-arc span      10502 days (28.75 yr)  
   first obs. used      1991-10-05  
   last obs. used      2020-07-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50425  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:18:37  

Additional Information
 Earth MOID = 1.52521 au 
 Jupiter MOID = 2.30119 au 
 T_jup = 3.374 
[ 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 14.2   n/a MPO381406  
diameter diameter 4.200 km 0.193 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.251   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17831 Ussery           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Robert Francis Ussery (b. 1985) was awarded second place in the 2003 Intel International Science and Engineering Fair for his engineering project. He attends the Seton Home Study School, Front Royal, Virginia, 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: 20040614/MPCPages.arcLast Updated: 2009-12-11

[ show close-approach data ]
Alternate Designations
 1998 HW35 = 1999 NP16 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-22 17:18 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin