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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0699223015841242 4.9909e-08  
a 3.047259328835058 1.5802e-08 au
q 2.834187943039217 1.583e-07 au
i 10.45908031283362 4.3417e-06 deg
node 192.9164691368227 1.8091e-05 deg
peri 162.5347869339609 3.2413e-05 deg
M 321.9390958545837 2.4541e-05 deg
tp 2459205.918309019449
(2020-Dec-22.41830902)
0.0001322 TDB
period 1942.954139094138
5.32
1.5113e-05
4.138e-08
d
yr
n .1852848673864441 1.4412e-09 deg/d
Q 3.260330714630899 1.6907e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1235  
   data-arc span      25256 days (69.15 yr)  
   first obs. used      1951-09-09  
   last obs. used      2020-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48953  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:57:03  

Additional Information
 Earth MOID = 1.83236 au 
 Jupiter MOID = 2.10056 au 
 T_jup = 3.209 
[ show covariance matrix ]

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

[ show close-approach data ]
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