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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4613626656801469 1.2635e-07  
a 2.276519458086401 2.776e-08 AU
q 1.226218372430936 2.8001e-07 AU
i 24.97673525720923 1.7771e-05 deg
node 31.31082677481212 2.7343e-05 deg
peri 21.22134006443797 4.5038e-05 deg
M 43.51639865010073 4.7945e-05 deg
tp 2456848.845283056353
(2014-Jul-10.34528306)
0.00016439 JED
period 1254.600559634925
3.43
2.2948e-05
6.283e-08
d
yr
n .2869439179150025 5.2486e-09 deg/d
Q 3.326820543741867 4.0568e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      163  
   data-arc span      7790 days (21.33 yr)  
   first obs. used      1993-10-23  
   last obs. used      2015-02-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .68654  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-21 05:18:19  

Additional Information
 Earth MOID = .251982 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 ]
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