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

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Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4613711218042181 1.6088e-07  
a 2.276723033153376 3.0531e-08 AU
q 1.226308773309901 3.5829e-07 AU
i 24.97839476878511 2.5048e-05 deg
node 31.32988639457174 2.8871e-05 deg
peri 21.18187946298659 4.6479e-05 deg
M 231.3849990341732 4.8156e-05 deg
tp 2456848.783602431020
(2014-Jul-10.28360243)		 0.00017652 JED
period 1254.768850159607
3.44		 2.524e-05
6.91e-08		 d
yr
n .2869054327848575 5.7712e-09 deg/d
Q 3.327137292996851 4.4617e-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.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .6341  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 15:44:24  

Additional Information
 Earth MOID = .251601 AU 
 T_jup = 3.349 
[ 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 16.9 mag n/a PDS3 (MPO 2898)  
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 ]
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