Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06929046047073655 4.9872e-08  
a 3.045043324896672 1.5557e-08 au
q 2.83405087076124 1.5801e-07 au
i 10.46334170500951 4.3217e-06 deg
node 192.8938912358817 1.7917e-05 deg
peri 162.7669835951747 3.2416e-05 deg
M 358.806462941264 2.4602e-05 deg
tp 2459206.934607317598
(2020-Dec-23.43460732)
0.00013262 TDB
period 1940.835114737405
5.31
1.4873e-05
4.072e-08
d
yr
n .1854871633692118 1.4214e-09 deg/d
Q 3.256035779032105 1.6635e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1278  
   data-arc span      25335 days (69.36 yr)  
   first obs. used      1951-09-09  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48664  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:58:28  

Additional Information
 Earth MOID = 1.83057 au 
 Jupiter MOID = 2.10027 au 
 T_jup = 3.210 
[ 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 14.21   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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-18 07:11 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin