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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1083888697305471 3.8138e-08  
a 2.364750150396702 8.9312e-09 au
q 2.108437554400062 8.942e-08 au
i 12.05722688178416 4.7835e-06 deg
node 41.24127900963433 1.7556e-05 deg
peri 138.5072037184521 2.6581e-05 deg
M 138.0233764516037 2.0673e-05 deg
tp 2458691.255360623595
(2019-Jul-26.75536062)
7.5453e-05 TDB
period 1328.239280103307
3.64
7.5248e-06
2.06e-08
d
yr
n .2710355019556417 1.5355e-09 deg/d
Q 2.621062746393342 9.8992e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1790  
   data-arc span      16204 days (44.36 yr)  
   first obs. used      1976-05-03  
   last obs. used      2020-09-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45726  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:58:26  

Additional Information
 Earth MOID = 1.12235 au 
 Jupiter MOID = 2.35706 au 
 T_jup = 3.511 
[ 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 14.32   n/a E2021B10  
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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