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30840 Jackalice (1991 GC2)
Classification: Main-belt Asteroid          SPK-ID: 2030840
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2033762362074323 7.4201e-08  
a 2.65447351458142 2.894e-08 AU
q 2.114616682073536 2.0778e-07 AU
i 12.24414851913631 6.0387e-06 deg
node 120.5299671018062 3.13e-05 deg
peri 76.45777744217827 3.515e-05 deg
M 179.4676186602549 2.3243e-05 deg
tp 2456213.001707089135
(2012-Oct-12.50170709)
9.3806e-05 JED
period 1579.668731129686
4.32
2.5833e-05
7.073e-08
d
yr
n .2278958827921783 3.7269e-09 deg/d
Q 3.194330347089303 3.4826e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      842  
   data-arc span      8637 days (23.65 yr)  
   first obs. used      1991-04-15  
   last obs. used      2014-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52956  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 03:22:20  

Additional Information
 Earth MOID = 1.15479 AU 
 T_jup = 3.327 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7 mag n/a MPO229256  

30840 Jackalice           Discovered 1991 Apr. 15 by C. S. Shoemaker and D. H. Levy at Palomar.
Jack Newton (b. 1942) is a Canadian astrophotographer credited with some of the most famous ground-based photographs ever taken. His work, from the sun to a gravitational lens, has appeared in major news magazines. His wife Alice has long assisted him in every one of his outreach efforts, in both Canada and the U.S.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

[ show close-approach data ]
Alternate Designations
 1991 GC2 = 1999 BJ24 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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