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5657 Groombridge (1936 QE1)
Classification: Main-belt Asteroid          SPK-ID: 2005657
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1671385177122713 6.7934e-08  
a 2.585880318748705 1.8445e-08 AU
q 2.153680115291711 1.7948e-07 AU
i 14.13862876211213 6.9516e-06 deg
node 166.740950492748 2.1374e-05 deg
peri 203.8235443711266 2.6068e-05 deg
M 220.4673508316779 1.55e-05 deg
tp 2457389.186934472195
(2016-Jan-01.68693447)
6.7425e-05 JED
period 1518.83661403387
4.16
1.6251e-05
4.449e-08
d
yr
n .2370235196291969 2.5361e-09 deg/d
Q 3.018080522205699 2.1528e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1092  
   data-arc span      28418 days (77.80 yr)  
   first obs. used      1936-09-11  
   last obs. used      2014-07-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43605  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:12:31  

Additional Information
 Earth MOID = 1.15715 AU 
 T_jup = 3.360 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.7 mag n/a MPO263398  

5657 Groombridge           Discovered 1936 Aug. 28 by K. Reinmuth at Heidelberg.
Stephen Groombridge (1755-1832) compiled a famous catalogue of circumpolar stars down to ninth magnitude. Starting in 1806, he used a transit circle for the 20-year work. In 1842 Argelander found that star No. 1830 in the catalogue had the highest proper motion then known. The name was suggested by L. D. Schmadel.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090806/MPCPages.arcLast Updated: 2011-05-09

[ show close-approach data ]
Alternate Designations
 1936 QE1 = 1986 RU1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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