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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1669268387337473 6.4712e-08  
a 2.586439269468508 1.6292e-08 au
q 2.154693138639307 1.7337e-07 au
i 14.13897279005394 6.3764e-06 deg
node 166.7318406190408 1.7938e-05 deg
peri 203.7229951136204 2.3146e-05 deg
M 2.736551234881191 1.4188e-05 deg
tp 2457388.950772456776
(2016-Jan-01.45077246)
5.9857e-05 JED
period 1519.329096625179
4.16
1.4355e-05
3.93e-08
d
yr
n .2369466896932683 2.2387e-09 deg/d
Q 3.018185400297709 1.9011e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1366  
   data-arc span      28936 days (79.22 yr)  
   first obs. used      1936-09-11  
   last obs. used      2015-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .41785  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:57:09  

Additional Information
 Earth MOID = 1.15761 au 
 Jupiter MOID = 2.44267 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

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