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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4612876345531639 1.2683e-07  
a 2.276275171958587 2.8117e-08 AU
q 1.226257582293714 2.8087e-07 AU
i 24.97671220420718 1.7999e-05 deg
node 31.31712467785907 2.7652e-05 deg
peri 21.21265859633245 4.5384e-05 deg
M 346.1274469639617 4.719e-05 deg
tp 2456848.838087340596
(2014-Jul-10.33808734)
0.0001653 JED
period 1254.398624204806
3.43
2.3242e-05
6.363e-08
d
yr
n .2869901106820911 5.3175e-09 deg/d
Q 3.32629276162346 4.1088e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      159  
   data-arc span      6763 days (18.52 yr)  
   first obs. used      1993-10-23  
   last obs. used      2012-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .69254  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 21:37:45  

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 ]
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