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11277 Ballard (1988 TW2)
Classification: Main-belt Asteroid          SPK-ID: 2011277
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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2386904695495955 3.69e-08  
a 2.403143006490726 1.0659e-08 au
q 1.829535673876628 8.9838e-08 au
i 22.7875457721189 5.6954e-06 deg
node 254.5901718903202 1.2724e-05 deg
peri 43.61934599911625 1.9058e-05 deg
M 128.1169186241841 1.6712e-05 deg
tp 2458116.247541455632
(2017-Dec-28.74754146)
6.1339e-05 TDB
period 1360.717124233619
3.73
9.0531e-06
2.479e-08
d
yr
n .2645663772349147 1.7602e-09 deg/d
Q 2.976750339104824 1.3203e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1359  
   data-arc span      11398 days (31.21 yr)  
   first obs. used      1988-09-12  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42375  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 22:33:43  

Additional Information
 Earth MOID = .860992 au 
 Jupiter MOID = 2.28995 au 
 T_jup = 3.382 
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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 13.1   n/a MPO313510  
diameter diameter 6.298 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10. h n/a LCDB (Rev. 2019-January); Warner et al., 2009 lower-limit; Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Carbognani, A. (2011) Minor Planet Bull. 38, 57-63.]
geometric albedo albedo 0.222   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

11277 Ballard           Discovered 1988 Oct. 8 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Robert D. Ballard (b. 1942) is a marine scientist who has spent much of his professional career beneath the sea, partly as director of the Deep Submergence Laboratory. As leader of two expeditions, he discovered the Titanic. He is a director of the Jason Project for Education.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020526/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1988 TW2 = 1995 MG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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