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6771 Foerster (1986 EZ4)
Classification: Main-belt Asteroid          SPK-ID: 2006771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1856966175045736 3.0775e-08  
a 2.324848952757413 5.4999e-09 au
q 1.893132366021311 7.3153e-08 au
i .8421556022534425 3.3536e-06 deg
node 3.795497166508636 0.00025189 deg
peri 129.6746933284206 0.00025212 deg
M 12.08101210423877 1.0729e-05 deg
tp 2459353.049842193702
(2021-May-18.54984219)
3.8536e-05 TDB
period 1294.763772712315
3.54
4.5945e-06
1.258e-08
d
yr
n .2780429971761257 9.8665e-10 deg/d
Q 2.756565539493515 6.5212e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1949  
   data-arc span      24579 days (67.29 yr)  
   first obs. used      1954-02-10  
   last obs. used      2021-05-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50337  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 00:45:00  

Additional Information
 Earth MOID = .908141 au 
 Jupiter MOID = 2.28299 au 
 T_jup = 3.552 
[ 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 14.44   n/a MPCxxxxx  
diameter diameter 3.064 km 0.283 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.399   0.090 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

6771 Foerster           Discovered 1986 Mar. 9 by C.-I. Lagerkvist at Siding Spring.
Named in honor of Wilhelm Julius Foerster (1832-1921), director of the Berlin Observatory for nearly 40 years. He made measurements of star positions and in 1860 was a codiscoverer of (62) Erato. He was a strong campaigner for the organized rapid and reliable telegraphic dissemination of urgent astronomical news and arranged for the establishment of the Astronomische Zentralstelle in Kiel. In 1889 he founded the Berlin "Urania", the first large public observatory, equipped with a 0.30-m refractor. This minor planet is being named on the occasion of the 50th anniversary of the "Wilhelm-Foerster-Sternwarte e.V.". Citation prepared in part by W. Tost.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19961026/MPCPages.arcLast Updated: 2003-09-26

Alternate Designations
 1986 EZ4 = 1974 YS 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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