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4565 Grossman (1981 EZ17)
Classification: Main-belt Asteroid          SPK-ID: 2004565
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .127454851047602 3.1241e-08  
a 2.568866936689739 9.6758e-09 au
q 2.241452383912838 8.2023e-08 au
i 14.72600118239114 3.5461e-06 deg
node 174.4099203786486 1.0845e-05 deg
peri 37.79486324579182 1.6643e-05 deg
M 207.4728763715792 1.393e-05 deg
tp 2459837.670147358821
(2022-Sep-15.17014736)
6.0037e-05 TDB
period 1503.871885816081
4.12
8.4966e-06
2.326e-08
d
yr
n .2393820932456922 1.3525e-09 deg/d
Q 2.896281489466638 1.0909e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2750  
   data-arc span      24225 days (66.32 yr)  
   first obs. used      1954-11-24  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40177  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:43:08  

Additional Information
 Earth MOID = 1.25454 au 
 Jupiter MOID = 2.09147 au 
 T_jup = 3.374 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.95   n/a E2021B10  
diameter diameter 7.360 km 0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.7429 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.271   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4565 Grossman           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Chairman of the Department of Geophysical Sciences at the University of Chicago, Lawrence Grossman (b. 1946) has spent his career studying calcium-aluminum inclusions (CAIs) in carbonaceous chondrites. He was among the first to propose that these minerals condensed from gases in the early solar system.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1981 EZ17 = 1981 ED 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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