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3420 Standish (1984 EB)
Classification: Main-belt Asteroid          SPK-ID: 2003420
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08070933326488129 3.4516e-08  
a 3.102864829459429 1.615e-08 au
q 2.852434677862709 1.0587e-07 au
i 14.30524393400198 3.9011e-06 deg
node 145.9111972094418 1.3536e-05 deg
peri 21.29617537438535 2.5367e-05 deg
M 138.9264330067537 2.2068e-05 deg
tp 2457830.084349861482
(2017-Mar-17.58434986)
0.00012076 TDB
period 1996.377709030963
5.47
1.5586e-05
4.267e-08
d
yr
n .1803265977031687 1.4078e-09 deg/d
Q 3.353294981056149 1.7453e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2259  
   data-arc span      25137 days (68.82 yr)  
   first obs. used      1951-01-04  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49128  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:25:54  

Additional Information
 Earth MOID = 1.8659 au 
 Jupiter MOID = 1.6487 au 
 T_jup = 3.169 
[ 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 11.9   n/a MPO328699  
diameter diameter 18.722 km 0.441 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.3869 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.088   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3420 Standish           Discovered 1984 Mar. 1 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Named in honor of E. Myles Standish, Jr., celestial mechanician at the Jet Propulsion Laboratory who has continually improved the accuracy of the planetary ephemerides by making use of diverse types of data, including optical astrometry, planetary ring occultations, radio interferometry, planetary radar and spacecraft tracking data. His efforts have been important in making the JPL planetary ephemeris an international standard. Name proposed by the discoverer following a suggestion by D. K. Yeomans, who provided the citation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC12016Last Updated: 2005-11-23

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Alternate Designations
 1984 EB = 1951 CC = 1973 DU = 1979 HS5 
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