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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1732618257697332 6.887e-08  
a 2.846362997700471 3.7317e-08 AU
q 2.353196947915477 1.9964e-07 AU
i 3.598595803236566 7.2572e-06 deg
node 265.2116954537823 0.00013144 deg
peri 145.9505713294274 0.00013414 deg
M 305.4294417105551 3.0646e-05 deg
tp 2457066.382498089272
(2015-Feb-12.88249809)
0.00015252 JED
period 1754.017226733259
4.80
3.4494e-05
9.444e-08
d
yr
n .2052431381591822 4.0363e-09 deg/d
Q 3.339529047485466 4.3783e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      696  
   data-arc span      13686 days (37.47 yr)  
   first obs. used      1976-12-18  
   last obs. used      2014-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50291  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:03:12  

Additional Information
 Earth MOID = 1.36394 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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