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

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2028754904632638 3.972e-08  
a 2.655320404535972 1.0053e-08 au
q 2.116620975128625 1.0686e-07 au
i 12.24205574959023 3.1594e-06 deg
node 120.4834665897797 1.9401e-05 deg
peri 76.33270644250607 2.0744e-05 deg
M 320.9881874348736 8.2528e-06 deg
tp 2459371.764540706967
(2021-Jun-06.26454071)
3.6448e-05 TDB
period 1580.424763693835
4.33
8.9752e-06
2.457e-08
d
yr
n .2277868635509058 1.2936e-09 deg/d
Q 3.19401983394332 1.2093e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2001  
   data-arc span      10936 days (29.94 yr)  
   first obs. used      1991-04-15  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45332  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 04:31:52  

Additional Information
 Earth MOID = 1.15494 au 
 Jupiter MOID = 1.90056 au 
 T_jup = 3.327 
[ 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 13.79   n/a MPCxxxxx  
diameter diameter 4.684 km 0.998 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.292   0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

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Alternate Designations
 1991 GC2 = 1999 BJ24 
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