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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4615714901736096 1.2362e-07  
a 2.275678710463634 2.5929e-08 au
q 1.225290296918576 2.7463e-07 au
i 24.9860643560868 1.6201e-05 deg
node 31.30035069906137 2.4282e-05 deg
peri 21.18223460476962 4.1634e-05 deg
M 158.3846346221501 4.8263e-05 deg
tp 2456848.835048603407
(2014-Jul-10.33504860)
0.00015886 JED
period 1253.905613865649
3.43
2.1431e-05
5.867e-08
d
yr
n .2871029493919887 4.9069e-09 deg/d
Q 3.326067124008692 3.7898e-08 au
  Orbit Determination Parameters
   # obs. used (total)      179  
   data-arc span      7842 days (21.47 yr)  
   first obs. used      1993-10-23  
   last obs. used      2015-04-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .70434  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:26:57  

Additional Information
 Earth MOID = .249972 au 
 Jupiter MOID = 2.17829 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
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 2016-Feb-14 08:08 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin