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20962 Michizane (1977 EW7)
Classification: Main-belt Asteroid          SPK-ID: 2020962
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1220180224085247 3.2955e-08  
a 2.619809501393379 1.2214e-08 au
q 2.300145526946296 8.7286e-08 au
i 12.85690364341462 4.0724e-06 deg
node 175.1076544748127 1.7022e-05 deg
peri 77.61373096899133 2.3973e-05 deg
M 54.39593572172586 1.748e-05 deg
tp 2458966.472470875250
(2020-Apr-26.97247088)
7.4916e-05 TDB
period 1548.827304229286
4.24
1.0831e-05
2.965e-08
d
yr
n .2324339188862247 1.6254e-09 deg/d
Q 2.939473475840462 1.3704e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1647  
   data-arc span      15911 days (43.56 yr)  
   first obs. used      1977-03-12  
   last obs. used      2020-10-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50867  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:35:21  

Additional Information
 Earth MOID = 1.32672 au 
 Jupiter MOID = 2.16218 au 
 T_jup = 3.359 
[ 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 14.04   n/a E2021B10  
diameter diameter 4.538 km 0.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.6388 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.179   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20962 Michizane           Discovered 1977 Mar. 12 by H. Kosai and K. Hurukawa at Kiso.
Sugawara no Michizane (845-903) was a noble, a scholar, a politician and a Kanshi poet. He is admired for his calligraphy, scholarship and poetry.
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 2017-11-04Last Updated: 2017-11-07

[ show close-approach data ]
Alternate Designations
 1977 EW7 = 1991 RT31 = 1999 NG60 = 2000 SZ225 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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