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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 ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08192962842494811 5.1062e-08  
a 2.279204747936959 1.1288e-08 au
q 2.092470349834106 1.1835e-07 au
i 5.320146897301547 5.4716e-06 deg
node 89.25168452991133 5.706e-05 deg
peri 248.6957328662012 6.6716e-05 deg
M 169.8212815526076 3.5858e-05 deg
tp 2457007.625117680405
(2014-Dec-16.12511768)
0.00012462 JED
period 1256.821027869442
3.44
9.3365e-06
2.556e-08
d
yr
n .2864369643864652 2.1278e-09 deg/d
Q 2.465939146039811 1.2212e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1367  
   data-arc span      14536 days (39.80 yr)  
   first obs. used      1976-06-20  
   last obs. used      2016-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51635  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:57:23  

Additional Information
 Earth MOID = 1.08891 au 
 Jupiter MOID = 2.78269 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 13.4 mag n/a MPO365332  

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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