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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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2033762249602084 7.5925e-08  
a 2.654473519820825 2.9903e-08 AU
q 2.114616716102828 2.1341e-07 AU
i 12.24414863292323 6.2851e-06 deg
node 120.5299661566969 3.1381e-05 deg
peri 76.4577767366429 3.53e-05 deg
M 179.4676178059271 2.3273e-05 deg
tp 2456213.001708506350
(2012-Oct-12.50170851)
9.3826e-05 JED
period 1579.668735806616
4.32
2.6693e-05
7.308e-08
d
yr
n .2278958821174462 3.851e-09 deg/d
Q 3.194330323538821 3.5985e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      808  
   data-arc span      8571 days (23.47 yr)  
   first obs. used      1991-04-15  
   last obs. used      2014-10-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53156  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 15:03:40  

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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