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21187 Setsuo (1994 FY)
Classification: Main-belt Asteroid          SPK-ID: 2021187
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1089269952432842 3.6874e-08  
a 2.363622219672907 8.6432e-09 au
q 2.106159953393675 8.68e-08 au
i 12.06073393797335 4.6092e-06 deg
node 41.21445511255161 1.7509e-05 deg
peri 138.498633520957 2.6188e-05 deg
M 191.1917093993444 2.0022e-05 deg
tp 2460018.881670867387
(2023-Mar-15.38167087)
7.4869e-05 TDB
period 1327.289084647535
3.63
7.2804e-06
1.993e-08
d
yr
n .2712295340661218 1.4877e-09 deg/d
Q 2.621084485952139 9.5847e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1816  
   data-arc span      16530 days (45.26 yr)  
   first obs. used      1976-05-03  
   last obs. used      2021-08-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45603  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:41:13  

Additional Information
 Earth MOID = 1.12151 au 
 Jupiter MOID = 2.35615 au 
 T_jup = 3.512 
[ 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 14.33   n/a MPCxxxxx  
diameter diameter 4.312 km 0.167 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.218   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21187 Setsuo           Discovered 1994 Mar. 31 by K. Endate and K. Watanabe at Kitami.
Setsuo Fukushima (b. 1961) was moved by astronomical images he first saw in middle school. His work as a volunteer lecturer at the Children's Astronomical Classroom at the Takamatsu City Planetarium spans over ten years.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-09-25Last Updated: 2018-10-01

Alternate Designations
 1994 FY = 1976 JS6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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