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18356 (1990 SF1)
Classification: Main-belt Asteroid          SPK-ID: 2018356
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1769525121301687 4.014e-08  
a 2.844326126292346 1.1879e-08 au
q 2.341015472927444 1.1345e-07 au
i 3.607372528290912 3.2992e-06 deg
node 264.8190001275842 6.8516e-05 deg
peri 146.9259808347406 6.9587e-05 deg
M 117.6991261781797 1.0869e-05 deg
tp 2458823.653517899368
(2019-Dec-06.15351790)
5.3156e-05 TDB
period 1752.134788528782
4.80
1.0976e-05
3.005e-08
d
yr
n .2054636448958826 1.2871e-09 deg/d
Q 3.347636779657248 1.3981e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1886  
   data-arc span      16239 days (44.46 yr)  
   first obs. used      1976-12-16  
   last obs. used      2021-06-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46419  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:00:01  

Additional Information
 Earth MOID = 1.35255 au 
 Jupiter MOID = 2.02702 au 
 T_jup = 3.282 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.13   n/a MPCxxxxx  
diameter diameter 9.399 km 1.415 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.055   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

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

Alternate Designations
 1990 SF1 = 1976 YW = 1994 NG11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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