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91428 Cortesi (1999 QT1)
Classification: Main-belt Asteroid          SPK-ID: 2091428
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1448133064845948 6.3186e-08  
a 2.629681150927274 2.2889e-08 AU
q 2.248868328461281 1.7051e-07 AU
i 11.82538614831275 8.3752e-06 deg
node 315.8260459088966 4.3732e-05 deg
peri 131.1113503009709 6.5276e-05 deg
M 87.69563149253473 4.3874e-05 deg
tp 2456421.072743129788
(2013-May-08.57274313)
0.00018879 JED
period 1557.589701431186
4.26
2.0336e-05
5.568e-08
d
yr
n .2311263355614224 3.0176e-09 deg/d
Q 3.010493973393268 2.6204e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      659  
   data-arc span      9570 days (26.20 yr)  
   first obs. used      1988-01-23  
   last obs. used      2014-04-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55338  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 15:36:59  

Additional Information
 Earth MOID = 1.28354 AU 
 T_jup = 3.356 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO257421  

91428 Cortesi           Discovered 1999 Aug. 20 by S. Sposetti at Gnosca.
Sergio Cortesi (b. 1932) has been the director of the Specola Solare Locarno-Monti since 1957. He was one of the co-founders and for a long time the president of the Società Astronomica Ticinese.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070402/MPCPages.arcLast Updated: 2007-07-05
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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