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31531 ARRL (1999 CQ137)
Classification: Main-belt Asteroid          SPK-ID: 2031531
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08176296223636684 6.9371e-08  
a 2.903220787001771 3.4392e-08 AU
q 2.66584485543031 2.0698e-07 AU
i 2.426305909641708 9.0892e-06 deg
node 157.1130516969178 0.00012951 deg
peri 138.0946153383023 0.00014092 deg
M 287.7575551213986 6.0117e-05 deg
tp 2457363.083851977005
(2015-Dec-06.58385198)
0.00030453 JED
period 1806.835122081887
4.95
3.2106e-05
8.79e-08
d
yr
n .1992434149637282 3.5404e-09 deg/d
Q 3.140596718573232 3.7204e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      620  
   data-arc span      8323 days (22.79 yr)  
   first obs. used      1991-09-05  
   last obs. used      2014-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53221  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 15:05:21  

Additional Information
 Earth MOID = 1.6517 AU 
 T_jup = 3.280 
[ 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 14.6 mag n/a PDS3 (MPO 18796)  

31531 ARRL           Discovered 1999 Feb. 9 by Spacewatch at Kitt Peak.
Since 1914, the American Radio Relay League has been the largest membership organization of radio amateurs in the U.S. ARRL promotes interest in "ham" radio and experimentation, maintains high standards of conduct and fraternalism among hams and represents their interests in matters legislative.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100726/MPCPages.arcLast Updated: 2010-07-28

[ show close-approach data ]
Alternate Designations
 1999 CQ137 = 1996 SE7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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