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18356 (1990 SF1)
Classification: Main-belt Asteroid          SPK-ID: 2018356
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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173143187365599 6.7226e-08  
a 2.845813258497136 2.7684e-08 AU
q 2.35308008027366 1.9837e-07 AU
i 3.598658519314567 6.4585e-06 deg
node 265.2075858831298 0.00012983 deg
peri 145.9938643059299 0.00013179 deg
M 346.4456385891211 2.2509e-05 deg
tp 2457066.521378061400
(2015-Feb-13.02137806)
0.00010992 JED
period 1753.509101729252
4.80
2.5587e-05
7.005e-08
d
yr
n .2053026127124063 2.9958e-09 deg/d
Q 3.338546436720612 3.2477e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      827  
   data-arc span      13896 days (38.05 yr)  
   first obs. used      1976-12-18  
   last obs. used      2015-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47419  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:51:19  

Additional Information
 Earth MOID = 1.36462 AU 
 T_jup = 3.282 
[ 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 14.0 mag n/a MPO319314  

18356 (1990 SF1)          Discovered 1990-Sep-16 by Holt, H. E. at Palomar (675)
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1990 SF1 = 1976 YW = 1994 NG11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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