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11756 Geneparker (2779 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2011756
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 .1807064229021945 4.1852e-08  
a 2.242823182381252 6.244e-09 au
q 1.83753062789102 9.5215e-08 au
i 2.207348155770334 3.2933e-06 deg
node 51.61115658325577 0.00010292 deg
peri 303.6341661676878 0.00010319 deg
M 344.1389550462878 7.6239e-06 deg
tp 2459254.553058992710
(2021-Feb-09.05305899)
2.6027e-05 TDB
period 1226.848627827714
3.36
5.1233e-06
1.403e-08
d
yr
n .2934347333765406 1.2254e-09 deg/d
Q 2.648115736871485 7.3723e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1915  
   data-arc span      22004 days (60.24 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-12-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47208  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:57:05  

Additional Information
 Earth MOID = .832356 au 
 Jupiter MOID = 2.79017 au 
 T_jup = 3.610 
[ 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 14.76   n/a E2021B10  
rotation period rot_per 10.571 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

11756 Geneparker           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
At the University of Chicago since 1955, Eugene N. Parker (b. 1927) is an authority on solar wind and the effects of magnetic fields in the heliosphere. He proposed models for the solar wind based on observations of comet tails and then saw spacecraft go out and confirm his models.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040306/MPCPages.arcLast Updated: 2004-03-08

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Alternate Designations
 2779 P-L = 1997 SB25 
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