Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
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 ]  
229945 (1998 US8)
Classification: Main-belt Asteroid          SPK-ID: 2229945
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .183622276257796 2.1473e-07  
a 2.31399861627296 1.9569e-08 AU
q 1.889096923095529 5.0345e-07 AU
i 2.128184958306222 1.6318e-05 deg
node 337.9497858475257 0.00032351 deg
peri 43.10654264482546 0.00032654 deg
M 158.8793394481364 3.2543e-05 deg
tp 2456233.075617084991
(2012-Nov-01.57561709)
0.000113 JED
period 1285.710140531423
3.52
1.631e-05
4.465e-08
d
yr
n .2800009027316228 3.5519e-09 deg/d
Q 2.738900309450392 2.3163e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      166  
   data-arc span      8157 days (22.33 yr)  
   first obs. used      1991-11-09  
   last obs. used      2014-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59302  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 13:59:00  

Additional Information
 Earth MOID = .891039 AU 
 T_jup = 3.559 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.6 mag n/a MPO241439  

229945 (1998 US8)          Discovered 1998-Oct-17 by Beijing Schmidt CCD Asteroid Program at Xinglong (327)
Reference: 20100130/Numbers.arcLast Updated: 2010-02-01

Alternate Designations
 1998 US8 = 2005 SQ88 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-17 18:41 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin