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215044 Joaoalves (2009 DW4)
Classification: Main-belt Asteroid          SPK-ID: 2215044
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1377896730151978 6.0668e-08  
a 2.421004273000691 2.5076e-08 au
q 2.087414885855529 1.474e-07 au
i .8792227795725643 7.6385e-06 deg
node 335.7979968734932 0.00046464 deg
peri 140.6645890055713 0.00046566 deg
M 282.5205047534873 3.6308e-05 deg
tp 2458896.625660771510
(2020-Feb-17.12566077)
0.00014171 TDB
period 1375.915492719239
3.77
2.1377e-05
5.853e-08
d
yr
n .2616439758873035 4.065e-09 deg/d
Q 2.754593660145853 2.8531e-08 au
  Orbit Determination Parameters
   # obs. used (total)      147  
   data-arc span      4997 days (13.68 yr)  
   first obs. used      2003-08-26  
   last obs. used      2017-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55143  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-May-15 17:43:23  

Additional Information
 Earth MOID = 1.10409 au 
 Jupiter MOID = 2.32774 au 
 T_jup = 3.500 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.9   n/a MPO302908  

215044 Joãoalves           Discovered 2009 Feb. 20 by F. Hormuth at Calar Alto.
Joõ Alves (b. 1968) was the director of Calar Alto Observatory from 2006-2010 and is now professor of stellar astrophysics at the University of Vienna. His main research focus is on early phases of star formation. The discoverer acknowledges Alves' attitude towards using Calar Alto's 1.23-m telescope for asteroid observations.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110517/MPCPages.arcLast Updated: 2011-06-24

Alternate Designations
 2009 DW4 = 2004 YV12 = 2007 TO26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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