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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1905043555217984 3.6748e-08  
a 3.041303408320696 1.4773e-08 au
q 2.461921862572313 1.1234e-07 au
i 1.846091875832865 4.8228e-06 deg
node 20.37078862668583 0.00012604 deg
peri 79.82544768134628 0.00012702 deg
M 48.77293451001612 1.3176e-05 deg
tp 2458938.039207677573
(2020-Mar-29.53920768)
7.0629e-05 TDB
period 1937.260617703246
5.30
1.4115e-05
3.864e-08
d
yr
n .1858294112367826 1.354e-09 deg/d
Q 3.62068495406908 1.7587e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1085  
   data-arc span      22087 days (60.47 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49885  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:57:07  

Additional Information
 Earth MOID = 1.47944 au 
 Jupiter MOID = 1.55158 au 
 T_jup = 3.211 
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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 14.81   n/a E2021B10  
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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