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16557 (1991 VE2)
Classification: Main-belt Asteroid          SPK-ID: 2016557
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09938359683584339 7.9018e-08  
a 2.549807018707567 2.2321e-08 AU
q 2.296398025951131 2.0311e-07 AU
i 14.72457779433733 1.0278e-05 deg
node 228.2963476855225 2.8769e-05 deg
peri 209.9386264023347 6.3454e-05 deg
M 174.1309834205116 5.9029e-05 deg
tp 2456081.162092561889
(2012-Jun-02.66209256)
0.00023935 JED
period 1487.165819608044
4.07
1.9528e-05
5.346e-08
d
yr
n .2420711902152789 3.1787e-09 deg/d
Q 2.803216011464004 2.4539e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      800  
   data-arc span      21744 days (59.53 yr)  
   first obs. used      1954-08-31  
   last obs. used      2014-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48775  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 11:07:19  

Additional Information
 Earth MOID = 1.31906 AU 
 T_jup = 3.388 
[ 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 12.9 mag n/a PDS3 (MPO 2868)  

16557 (1991 VE2)          Discovered 1991-Nov-09 by Ueda, S., Kaneda, H. at Kushiro (399)
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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