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6921 Janejacobs (1993 JJ)
Classification: Main-belt Asteroid          SPK-ID: 2006921
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 .08236045923801388 6.161e-08  
a 2.279036472508033 1.4004e-08 AU
q 2.091333982012088 1.4399e-07 AU
i 5.320733838787844 5.5379e-06 deg
node 89.26208774021634 6.8566e-05 deg
peri 248.68685609 7.7933e-05 deg
M 357.9034642736322 3.9177e-05 deg
tp 2457007.818551053250
(2014-Dec-16.31855105)
0.00013677 JED
period 1256.681842352629
3.44
1.1583e-05
3.171e-08
d
yr
n .2864686891043524 2.6403e-09 deg/d
Q 2.466738963003977 1.5157e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1212  
   data-arc span      13898 days (38.05 yr)  
   first obs. used      1976-06-20  
   last obs. used      2014-07-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51362  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 14:09:21  

Additional Information
 Earth MOID = 1.08909 AU 
 T_jup = 3.597 
[ 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 13.3 mag n/a MPO263410  

6921 Janejacobs           Discovered 1993 May 14 by S. Ueda and H. Kaneda at Kushiro.
Having moved to New York City during the Depression, Jane Jacobs (1916-2006) was way ahead of her time in championing the idea that cities are more important than nations in the "real economic world". Cities should not be laboratories for ill-placed expressways and housing projects but left to develop by themselves.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060613/MPCPages.arcLast Updated: 2008-05-22

[ show close-approach data ]
Alternate Designations
 1993 JJ = 1976 MB = 1977 XV2 = 1980 TU1 = 1984 YN = 1987 SH22 = 1990 HE2 = 1990 MV1 = 1992 BF5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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