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7940 Erichmeyer (1991 EO1)
Classification: Main-belt Asteroid          SPK-ID: 2007940
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08784106525522731 2.9481e-08  
a 2.637085882790764 1.0237e-08 au
q 2.405441449676902 7.7577e-08 au
i 3.721408660220892 3.6615e-06 deg
node 117.3848163046517 5.0295e-05 deg
peri 279.4846174909093 5.4932e-05 deg
M 123.3674892032774 2.2226e-05 deg
tp 2458664.477447083862
(2019-Jun-29.97744708)
9.5751e-05 TDB
period 1564.173189355004
4.28
9.1078e-06
2.494e-08
d
yr
n .2301535421077305 1.3401e-09 deg/d
Q 2.868730315904627 1.1136e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2149  
   data-arc span      24336 days (66.63 yr)  
   first obs. used      1954-07-29  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50785  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:10:27  

Additional Information
 Earth MOID = 1.41482 au 
 Jupiter MOID = 2.47303 au 
 T_jup = 3.388 
[ 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 13.76   n/a E2021B10  

7940 Erichmeyer           Discovered 1991 Mar. 13 at the Oak Ridge Observatory.
Named in honor of Erich Meyer (b. 1951), Austrian amateur astronomer, on the occasion of his 20th anniversary as an astrometricist. Using a measuring engine he constructed himself, Meyer measured about 250 precise positions of minor planets and comets from photographic plates. Among the 2600 positions he derived after switching to CCD equipment in 1993 are some for the 1997 opposition of this object, thereby rendering it appropriate for numbering. An electrical engineer by profession, Meyer is also a well-known astrophotographer and popularizer of astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980610/MPCPages.arcLast Updated: 2009-11-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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