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JPL Small-Body Database Browser
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11761 Davidgill (4868 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2011761
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1904373316942273 4.122e-08  
a 3.040881400989954 1.7219e-08 au
q 2.461784060986824 1.2669e-07 au
i 1.846288633372503 5.5483e-06 deg
node 20.38462575278565 0.00014279 deg
peri 79.94943922856807 0.00014367 deg
M 297.1715725932718 1.4039e-05 deg
tp 2458938.526959538946
(2020-Mar-30.02695954)
7.6222e-05 TDB
period 1936.857414021298
5.30
1.6452e-05
4.504e-08
d
yr
n .1858680961199766 1.5788e-09 deg/d
Q 3.619978740993085 2.0499e-08 au
  Orbit Determination Parameters
   # obs. used (total)      902  
   data-arc span      21614 days (59.18 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50458  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:39:31  

Additional Information
 Earth MOID = 1.47963 au 
 Jupiter MOID = 1.55268 au 
 T_jup = 3.211 
[ 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 14.7   n/a MPO452336  
diameter diameter 6.856 km 0.199 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.050   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11761 Davidgill           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
David Gill (1843-1914) was a British astronomer and instrument designer who directed the observatory at the Cape of Good Hope and carried out all the observations to measure distances to the stars in terms of the standard meter.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070926/MPCPages.arcLast Updated: 2007-09-30

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Alternate Designations
 4868 P-L = 1962 CE1 = 1997 TT11 = 1998 XT48 = 1999 BG21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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