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6712 Hornstein (1990 DS1)
Classification: Main-belt Asteroid          SPK-ID: 2006712
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1231048491463177 2.8698e-08  
a 2.39859844467084 6.6576e-09 au
q 2.103319344977044 6.9315e-08 au
i .9690171664418725 2.5971e-06 deg
node 264.1376601664361 0.00020796 deg
peri 322.723753759745 0.00020842 deg
M 354.3165066635209 1.2999e-05 deg
tp 2459021.921387768720
(2020-Jun-21.42138777)
4.8973e-05 TDB
period 1356.859090032231
3.71
5.6492e-06
1.547e-08
d
yr
n .2653186337804971 1.1046e-09 deg/d
Q 2.693877544364636 7.4771e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2732  
   data-arc span      15103 days (41.35 yr)  
   first obs. used      1979-03-29  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45574  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:42:28  

Additional Information
 Earth MOID = 1.09369 au 
 Jupiter MOID = 2.28869 au 
 T_jup = 3.517 
[ 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 14.1   n/a MPO384815  
diameter diameter 9.281 km 0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6712 Hornstein           Discovered 1990 Feb. 23 by A. Mrkos at Klet.
Karl Hornstein (1824-1882), the eighth director of the Klementinum observatory in Prague, studied the orbits of minor planets, including the irregularities in their distribution that were later called the Kirkwood gaps. The name was suggested by J. Ticha and M. Šolc.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1990 DS1 = 1979 FN2 = 1990 EP7 = 1994 GM9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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