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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1670343165953113 6.7147e-08  
a 2.586270481368639 1.8152e-08 AU
q 2.154274558982602 1.7791e-07 AU
i 14.1381967853376 6.8066e-06 deg
node 166.735389789268 2.1018e-05 deg
peri 203.7848187123598 2.5751e-05 deg
M 267.9094952394549 1.5468e-05 deg
tp 2457389.116909751404
(2016-Jan-01.61690975)
6.6572e-05 JED
period 1519.180374505282
4.16
1.5994e-05
4.379e-08
d
yr
n .2369698858947104 2.4948e-09 deg/d
Q 3.018266403754676 2.1184e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1138  
   data-arc span      28779 days (78.79 yr)  
   first obs. used      1936-09-11  
   last obs. used      2015-06-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .43989  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:52:03  

Additional Information
 Earth MOID = 1.15917 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 12.8 mag n/a MPO302098  

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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