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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1649449818362344 4.3641e-08  
a 2.586866901635587 1.1333e-08 au
q 2.160176187532549 1.1717e-07 au
i 14.12437192995008 4.4709e-06 deg
node 166.6028979018613 1.3703e-05 deg
peri 204.1652690566953 1.7861e-05 deg
M 21.34938876316501 1.263e-05 deg
tp 2458910.375576858909
(2020-Mar-01.87557686)
5.3069e-05 TDB
period 1519.705912460183
4.16
9.9863e-06
2.734e-08
d
yr
n .236887938020332 1.5566e-09 deg/d
Q 3.013557615738624 1.3202e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2177  
   data-arc span      30426 days (83.30 yr)  
   first obs. used      1936-08-28  
   last obs. used      2019-12-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41588  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:43:23  

Additional Information
 Earth MOID = 1.16521 au 
 Jupiter MOID = 2.45611 au 
 T_jup = 3.360 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO502208  
diameter diameter 7.370 km 0.247 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.43566 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.296   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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