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11820 Mikiyasato (1981 EP38)
Classification: Main-belt Asteroid          SPK-ID: 2011820
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06992230268138834 5.0431e-08  
a 3.047259335302282 1.9351e-08 au
q 2.83418794571059 1.5879e-07 au
i 10.4590762235334 5.3778e-06 deg
node 192.9164577868306 2.0622e-05 deg
peri 162.5348054036419 3.6489e-05 deg
M 321.9390867563297 2.9654e-05 deg
tp 2459205.918358777531
(2020-Dec-22.41835878)
0.00016048 TDB
period 1942.95414527946
5.32
1.8508e-05
5.067e-08
d
yr
n .1852848667965966 1.7649e-09 deg/d
Q 3.260330724893975 2.0704e-08 au
  Orbit Determination Parameters
   # obs. used (total)      937  
   data-arc span      24794 days (67.88 yr)  
   first obs. used      1951-09-09  
   last obs. used      2019-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53175  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:09:46  

Additional Information
 Earth MOID = 1.83236 au 
 Jupiter MOID = 2.10056 au 
 T_jup = 3.209 
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Orbital Elements at Epoch 2456643.5 (2013-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07330511550414123 5.0847e-08  
q 2.821534634415734 1.6085e-07 au
tp 2457271.421604022984
(2015-Sep-05.92160402)
0.00014936 TDB
node 193.135691364424 2.0577e-05 deg
peri 163.8093543492245 3.5146e-05 deg
i 10.47364101329665 5.3863e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      937  
   data-arc span      24794 days (67.88 yr)  
   first obs. used      1951-09-09  
   last obs. used      2019-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53175  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:09:46  

Additional Information
 Jupiter MOID = 2.10056 au 
 T_jup = 3.209 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.58541157712163E-15 -8.133887379840489E-15 2.066151193485064E-12 -1.851415974900038E-15 4.682358984291772E-13 1.914091398832209E-15
q -8.133887379840489E-15 2.587281344610784E-14 -6.074305724817966E-12 5.415901516104338E-15 -1.41124251861781E-12 -5.373377429663818E-15
tp 2.066151193485064E-12 -6.074305724817966E-12 2.230908131990285E-8 -1.620819765924925E-11 4.259897862909597E-9 1.159936172017116E-11
node -1.851415974900038E-15 5.415901516104338E-15 -1.620819765924925E-11 4.234012590235991E-10 -4.191106640846857E-10 1.284086384347119E-11
peri 4.682358984291772E-13 -1.41124251861781E-12 4.259897862909597E-9 -4.191106640846857E-10 1.235263660161009E-9 -1.043229376666442E-11
i 1.914091398832209E-15 -5.373377429663818E-15 1.159936172017116E-11 1.284086384347119E-11 -1.043229376666442E-11 2.901175412342481E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO435811  
diameter diameter 5.388 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 6.419 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Erasmus, N.; McNeill, A.; Mommert, N.; Trilling, D.E.; et al. (2019) Ap. J. Suppl. Series 242, A15.]
geometric albedo albedo 0.153   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11820 Mikiyasato           Discovered 1981 Mar. 1 by S. J. Bus at Siding Spring.
Mikiya Sato (b. 1967) is a Japanese amateur astronomer who studies dust trails of meteor showers, notably the Phoenicids.
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 2017-03-12Last Updated: 2017-04-19

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