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42490 (1991 SU)
Classification: Main-belt Asteroid          SPK-ID: 2042490
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1380993892498673 5.7657e-08  
a 2.413815510722858 1.6466e-08 AU
q 2.080469062930175 1.3494e-07 AU
i 8.393082610817798 6.5154e-06 deg
node 109.8182577112663 3.995e-05 deg
peri 285.3775082455106 4.6861e-05 deg
M 32.8579046930444 2.4079e-05 deg
tp 2456875.476428184304
(2014-Aug-05.97642818)
9.1545e-05 JED
period 1369.791722086846
3.75
1.4016e-05
3.837e-08
d
yr
n .2628136775797917 2.6891e-09 deg/d
Q 2.747161958515541 1.874e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      982  
   data-arc span      11048 days (30.25 yr)  
   first obs. used      1984-12-23  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50754  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 17:29:40  

Additional Information
 Earth MOID = 1.10601 AU 
 T_jup = 3.490 
[ 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 14.1 mag n/a MPO266156  
rotation period rot_per 7.9526 h n/a LCDB (Rev. 2015-July); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J., in press.]

42490 (1991 SU)          Discovered 1991-Sep-30 by McNaught, R. H. at Siding Spring
Reference: 20020624/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 SU = 1984 YU2 = 2000 CD3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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