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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173143187284535 6.7228e-08  
a 2.845813258283724 2.7739e-08 AU
q 2.353080080327893 1.9837e-07 AU
i 3.598658500430904 6.4648e-06 deg
node 265.20758583644 0.00012994 deg
peri 145.9938642253058 0.00013189 deg
M 346.4456387899331 2.2566e-05 deg
tp 2457066.521377075846
(2015-Feb-13.02137708)
0.0001102 JED
period 1753.509101532005
4.80
2.5638e-05
7.019e-08
d
yr
n .2053026127355002 3.0017e-09 deg/d
Q 3.338546436239556 3.2542e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      801  
   data-arc span      13828 days (37.86 yr)  
   first obs. used      1976-12-18  
   last obs. used      2014-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48139  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:38:52  

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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