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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1904373311351773 4.0971e-08  
a 3.040881400506355 1.6808e-08 au
q 2.461784062295324 1.2623e-07 au
i 1.846289317305367 5.4574e-06 deg
node 20.38461243854491 0.00014129 deg
peri 79.94945233552293 0.00014218 deg
M 297.1715729177829 1.3814e-05 deg
tp 2458938.526957712388
(2020-Mar-30.02695771)
7.4908e-05 TDB
period 1936.857413559263
5.30
1.6059e-05
4.397e-08
d
yr
n .1858680961643153 1.5411e-09 deg/d
Q 3.619978738717385 2.0009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      936  
   data-arc span      21620 days (59.19 yr)  
   first obs. used      1960-09-24  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49845  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:19:10  

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 14.8   n/a MPO502259  
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1938-Sep-27 15:43 00:02 Jupiter 1.71082656261253 1.71082542141512 1.71082770380808 1.99342215420642 1.72729294108183 2429169.154894882 2.13507021167662 80.7015810681129 38.8482946018692 -79.9469804136424 863064.883181808 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
1948-Jan-10 16:36 00:02 Jupiter 1.82231665882134 1.82231552309464 1.82231779454617 1.72519690298209 1.43062702067424 2432561.191729177 1.85058404509534 79.1670609774998 58.7378506521307 -54.5816740898923 1065357.62218727 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
1987-Jan-05 06:48 < 00:01 Jupiter 1.92628957032291 1.92628876209701 1.92629037854871 3.14921624784227 3.0063480705817 2446800.783532797 0.801942902904615 59.1698264524372 26.4422161074915 84.2708655391702 1734030.48159315 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
1996-Apr-20 10:49 < 00:01 Jupiter 1.6334577757519 1.63345730749538 1.63345824401046 1.21923032270685 0.670396276457957 2450193.950550053 0.595056674105421 579.233816406433 207.522063115097 16.8089577436056 1940005.15645358 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
2044-Jul-18 18:18 < 00:01 Jupiter 1.56612954758935 1.56612915308953 1.56612994210423 1.21365357923492 0.625522842965466 2467815.262717107 0.892292545348447 829.651227298796 252.332977406096 26.345564698912 2454711.43963344 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
2092-Oct-20 10:28 00:02 Jupiter 1.64176663477287 1.64176564256553 1.64176762697807 1.6854793462573 1.34498990961424 2485440.935865453 2.31352879032751 139.889772904941 92.9950138353071 29.143529662607 903685.394543753 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
2102-Feb-03 20:19 00:03 Jupiter 1.90336664872441 1.90336494502213 1.90336835242462 2.02439240601881 1.79112786249779 2488833.346831197 2.5264183106638 75.3761061436999 13.8492247445652 -89.1463921845751 990690.381086374 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
2141-Feb-03 09:20 00:04 Jupiter 1.83900793683791 1.83900584093645 1.83901003273896 2.69332522561356 2.51651096940154 2503077.889153283 3.56938350740037 125.400791726053 27.0849165084183 72.8879142253018 1022361.8647052 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
2150-May-17 17:53 00:04 Jupiter 1.67495511027745 1.67495325860764 1.67495696194649 1.33638296490732 0.880069403788581 2506468.244889837 3.8672934213804 603.048533778732 130.538367736361 26.2325578428776 1349038.95744834 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19
2198-Aug-21 02:53 00:05 Jupiter 1.55352687726367 1.55352615497355 1.55352759960572 1.15455449509509 0.492488600005359 2524095.620257113 4.95406780367751 1618.80257576303 751.264399604252 19.6506867379028 1867097.38454994 T 21 CATAB v2.0f-lin.ifort 2019-Dec-13 23:19:21 2019-Dec-13 23:19

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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