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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1731431940439644 6.8828e-08  
a 2.845813273165132 3.7142e-08 AU
q 2.353080073396612 1.9956e-07 AU
i 3.598653150627916 7.2512e-06 deg
node 265.2075447726634 0.00013145 deg
peri 145.9939132770901 0.00013414 deg
M 346.4456256428932 3.1065e-05 deg
tp 2457066.521441631081
(2015-Feb-13.02144163)
0.00015211 JED
period 1753.509115286254
4.80
3.4328e-05
9.398e-08
d
yr
n .2053026111251388 4.0192e-09 deg/d
Q 3.338546472933653 4.3573e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      708  
   data-arc span      13716 days (37.55 yr)  
   first obs. used      1976-12-18  
   last obs. used      2014-07-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4994  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:30:55  

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 13.9 mag n/a MPO266052  

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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