Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1387320469858302 5.7724e-08  
a 2.41474014563035 1.6765e-08 au
q 2.07973830228819 1.3527e-07 au
i 8.388616169940782 6.5113e-06 deg
node 109.789985407679 3.9992e-05 deg
peri 285.5984257194254 4.6795e-05 deg
M 137.6825850938745 2.3988e-05 deg
tp 2456876.319885530109
(2014-Aug-06.81988553)
9.0958e-05 JED
period 1370.578865006771
3.75
1.4274e-05
3.908e-08
d
yr
n .2626627399498251 2.7354e-09 deg/d
Q 2.74974198897251 1.9091e-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 = 1.10419 au 
 Jupiter MOID = 2.67885 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-December); 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. 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-11 10:44 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin