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 ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1216786523244164 3.3683e-08  
a 2.619409692658618 1.2218e-08 au
q 2.300683451370404 8.8874e-08 au
i 12.85256207688136 4.1794e-06 deg
node 175.1420294613048 1.73e-05 deg
peri 77.69838100961024 2.4448e-05 deg
M 7.828138498975183 1.7869e-05 deg
tp 2458966.828724188425
(2020-Apr-27.32872419)
7.6819e-05 TDB
period 1548.472768302947
4.24
1.0834e-05
2.966e-08
d
yr
n .2324871365962367 1.6266e-09 deg/d
Q 2.938135933946833 1.3705e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1565  
   data-arc span      15850 days (43.39 yr)  
   first obs. used      1977-03-12  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51895  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:40:21  

Additional Information
 Earth MOID = 1.32866 au 
 Jupiter MOID = 2.16465 au 
 T_jup = 3.360 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456868.5 (2014-Jul-30.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1213343643110736 3.3821e-08  
q 2.302704318797887 8.9253e-08 au
tp 2457415.687437434520
(2016-Jan-28.18743743)
7.5569e-05 TDB
node 175.2084858286451 1.7321e-05 deg
peri 76.93130545396292 2.443e-05 deg
i 12.84108957533074 4.1767e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1565  
   data-arc span      15850 days (43.39 yr)  
   first obs. used      1977-03-12  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51895  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:40:21  

Additional Information
 Jupiter MOID = 2.16465 au 
 T_jup = 3.360 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.143861860497068E-15 -2.996091096127996E-15 -9.477869612901923E-14 -7.458752007300884E-15 -8.718159218521146E-15 4.023480346718072E-16
q -2.996091096127996E-15 7.966185361283098E-15 3.035721802984493E-13 1.912295885062939E-14 2.543447770887097E-14 -1.511729755845249E-15
tp -9.477869612901923E-14 3.035721802984493E-13 5.710683031850318E-9 -2.16130244391823E-12 1.315572524931647E-9 -6.439005714412963E-12
node -7.458752007300884E-15 1.912295885062939E-14 -2.16130244391823E-12 3.000256533294659E-10 -2.926439938143264E-10 2.032261347208114E-12
peri -8.718159218521146E-15 2.543447770887097E-14 1.315572524931647E-9 -2.926439938143264E-10 5.968093162066385E-10 -3.414991555090421E-12
i 4.023480346718072E-16 -1.511729755845249E-15 -6.439005714412963E-12 2.032261347208114E-12 -3.414991555090421E-12 1.74449383567596E-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 14.0   n/a MPO435894  
diameter diameter 4.538 km 0.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-01 14:23 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin