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 ]  
16657 (1993 UB)
Classification: Amor [NEO]          SPK-ID: 2016657
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4612876092441773 1.3132e-07  
a 2.276275159928403 2.8964e-08 AU
q 1.226257633423122 2.9119e-07 AU
i 24.97671352266426 2.0291e-05 deg
node 31.31707681757701 2.5678e-05 deg
peri 21.21269419971732 4.4898e-05 deg
M 346.1274615020851 4.8725e-05 deg
tp 2456848.838036300167
(2014-Jul-10.33803630)
0.00017067 JED
period 1254.398614260503
3.43
2.3942e-05
6.555e-08
d
yr
n .2869901129572184 5.4777e-09 deg/d
Q 3.326292686433683 4.2325e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      160  
   data-arc span      6761 days (18.51 yr)  
   first obs. used      1993-10-25  
   last obs. used      2012-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .71981  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Aug-05 09:21:19  

Additional Information
 Earth MOID = .251061 AU 
 T_jup = 3.350 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.6 mag n/a MPO229170  
SMASSII spectral type spec_B Sr   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

16657 (1993 UB)          Discovered 1993-Oct-23 by McNaught, R. H. at Siding Spring (413)
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-19 19:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin