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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06906208551188797 4.8795e-08  
a 3.044395748771912 1.5191e-08 au
q 2.834143429238198 1.5421e-07 au
i 10.46439434476189 4.3071e-06 deg
node 192.8933588891402 1.7831e-05 deg
peri 162.8293069815278 3.2378e-05 deg
M 35.1213543124212 2.462e-05 deg
tp 2459207.213848808875
(2020-Dec-23.71384881)
0.00013292 TDB
period 1940.216024206823
5.31
1.4522e-05
3.976e-08
d
yr
n .1855463492252988 1.3887e-09 deg/d
Q 3.254648068305626 1.624e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1281  
   data-arc span      25535 days (69.91 yr)  
   first obs. used      1951-09-09  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48611  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 20:39:43  

Additional Information
 Earth MOID = 1.83149 au 
 Jupiter MOID = 2.09929 au 
 T_jup = 3.210 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457423.5 (2016-Feb-05.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07294858357101579 4.8962e-08  
q 2.822851913116701 1.5586e-07 au
tp 2457269.899544340895
(2015-Sep-04.39954434)
0.00012778 TDB
node 193.1153153745901 1.7804e-05 deg
peri 163.4727992113119 3.103e-05 deg
i 10.47446379964102 4.3094e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1281  
   data-arc span      25535 days (69.91 yr)  
   first obs. used      1951-09-09  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48611  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 20:39:43  

Additional Information
 Jupiter MOID = 2.09929 au 
 T_jup = 3.210 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.397246216288992E-15 -7.603592214922407E-15 1.509112461292811E-12 -8.84701629768709E-15 3.753715599132889E-13 -1.937972432670204E-15
q -7.603592214922407E-15 2.429079861801844E-14 -5.125156889960832E-12 2.765360614853826E-14 -1.253998818574904E-12 6.30804707792518E-15
tp 1.509112461292811E-12 -5.125156889960832E-12 1.63265164249998E-8 -1.316694353701942E-11 3.252232620215501E-9 6.853428115842913E-12
node -8.84701629768709E-15 2.765360614853826E-14 -1.316694353701942E-11 3.169743044270163E-10 -3.142334854358702E-10 -1.648238726507778E-11
peri 3.753715599132889E-13 -1.253998818574904E-12 3.252232620215501E-9 -3.142334854358702E-10 9.62891788860357E-10 1.748122783216937E-11
i -1.937972432670204E-15 6.30804707792518E-15 6.853428115842913E-12 -1.648238726507778E-11 1.748122783216937E-11 1.857096531130331E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.21   n/a E2021B10  
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. 2020-October); 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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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