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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1736915138457554 5.2595e-08  
a 2.848937189580036 2.1413e-08 au
q 2.354100976270408 1.4753e-07 au
i 3.595912983331103 5.2639e-06 deg
node 265.0825521924795 0.00011281 deg
peri 146.4931109069683 0.00011486 deg
M 109.1457399274205 2.0916e-05 deg
tp 2457067.990908067018
(2015-Feb-14.49090807)
0.00010138 JED
period 1756.397210036341
4.81
1.9802e-05
5.421e-08
d
yr
n .2049650261016706 2.3108e-09 deg/d
Q 3.343773402889664 2.5132e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1087  
   data-arc span      14344 days (39.27 yr)  
   first obs. used      1976-12-18  
   last obs. used      2016-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49978  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:29:44  

Additional Information
 Earth MOID = 1.36448 au 
 Jupiter MOID = 2.03199 au 
 T_jup = 3.281 
[ 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 14.1 mag n/a MPO365473  

18356 (1990 SF1)          Discovered 1990-Sep-16 by Holt, H. E. at Palomar
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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