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11768 Merrill (4107 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2011768
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06929116509554775 3.2243e-08  
a 3.162909308729913 1.7743e-08 au
q 2.943747637636464 1.0461e-07 au
i 9.279715296616045 4.3889e-06 deg
node 11.22008121193651 2.3604e-05 deg
peri 83.01334300890154 4.8064e-05 deg
M 23.16506374050683 3.8862e-05 deg
tp 2459068.291452243998
(2020-Aug-06.79145224)
0.00022202 TDB
period 2054.605924046524
5.63
1.7289e-05
4.733e-08
d
yr
n .1752160819681586 1.4744e-09 deg/d
Q 3.382070979823362 1.8973e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1869  
   data-arc span      18253 days (49.97 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4565  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:57:14  

Additional Information
 Earth MOID = 1.97903 au 
 Jupiter MOID = 1.76824 au 
 T_jup = 3.180 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457394.5 (2016-Jan-07.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06763535289002447 3.2676e-08  
q 2.952135788167369 1.0676e-07 au
tp 2457026.224335209662
(2015-Jan-03.72433521)
0.00023081 TDB
node 11.24844005162689 2.3596e-05 deg
peri 85.18406049488097 4.8628e-05 deg
i 9.279927953927745 4.3886e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1869  
   data-arc span      18253 days (49.97 yr)  
   first obs. used      1971-03-24  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4565  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:57:14  

Additional Information
 Jupiter MOID = 1.76824 au 
 T_jup = 3.180 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.067737430835404E-15 -3.444186134381813E-15 1.14548116420997E-12 6.47965928523954E-16 1.997034904266912E-13 -2.648318643038081E-15
q -3.444186134381813E-15 1.139764371585573E-14 -4.980625830196406E-12 -2.910497922771716E-15 -8.703231928315354E-13 8.638579422773752E-15
tp 1.14548116420997E-12 -4.980625830196406E-12 5.327545308405331E-8 -5.043931776612807E-11 9.830104390909228E-9 -6.175614693724102E-12
node 6.47965928523954E-16 -2.910497922771716E-15 -5.043931776612807E-11 5.567836381526582E-10 -5.587567395327081E-10 -1.689933502580521E-11
peri 1.997034904266912E-13 -8.703231928315354E-13 9.830104390909228E-9 -5.587567395327081E-10 2.364680020323427E-9 1.557891493831407E-11
i -2.648318643038081E-15 8.638579422773752E-15 -6.175614693724102E-12 -1.689933502580521E-11 1.557891493831407E-11 1.926017675024295E-11

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 13.19   n/a E2021B10  
diameter diameter 11.767 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.4028 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.088   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11768 Merrill           Discovered 1971 Mar. 26 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Paul W. Merrill (1887-1961), a Mt. Wilson Observatory spectroscopist, was the first to detect a short-lived isotope, of technetium, in the atmospheres of stars, thus confirming that nucleosynthesis must occur in stars.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071124/MPCPages.arcLast Updated: 2007-11-26

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Alternate Designations
 4107 T-1 = 1996 TD12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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