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

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Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: MPO229256 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.2029618 n/a  
a 2.6552856 n/a AU
q 2.1163641 n/a AU
i 12.24309 n/a deg
node 120.53095 n/a deg
peri 76.51005 n/a deg
M 42.74089 n/a deg
tp 2456212.8682402
(2012-Oct-12.36824020)
n/a JED
period 1580.3937059
4.33
n/a
n/a
d
yr
n 0.22779134 n/a deg/d
Q 3.1942071 n/a AU
  Orbit Determination Parameters
   # obs. used (total)      752  
   first obs. used      1991-??-??  
   last obs. used      2012-04-21  
   # oppositions      12  
   planetary ephem.      DE403  
   condition code      0  
   fit RMS      0.53  
   data source      MPC:mpn  
   producer      MPCLINUX  

Additional Information
 T_jup = 3.327 

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2 mag n/a PDS3 (MPO 18556)  

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

Alternate Designations
 1991 GC2 = 1999 BJ24 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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