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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1392282053643173 5.7501e-08  
a 2.413715808474178 1.466e-08 au
q 2.077658488200836 1.3471e-07 au
i 8.388637476459959 5.2957e-06 deg
node 109.7660919005938 3.8883e-05 deg
peri 285.6026529613644 4.3507e-05 deg
M 190.2412254264681 2.1429e-05 deg
tp 2458246.388214260198
(2018-May-07.88821426)
8.3595e-05 JED
period 1369.706854433932
3.75
1.2479e-05
3.417e-08
d
yr
n .262829961633491 2.3945e-09 deg/d
Q 2.74977312874752 1.6701e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1086  
   data-arc span      11434 days (31.30 yr)  
   first obs. used      1984-12-23  
   last obs. used      2016-04-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49633  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 14:20:17  

Additional Information
 Earth MOID = 1.10206 au 
 Jupiter MOID = 2.67774 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 14.2 mag n/a MPO365750  
rotation period rot_per 7.9526 h n/a LCDB (Rev. 2016-February); 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. (2016) Astron. J. 150, A75.]

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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