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JPL Small-Body Database Browser
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49287 (1998 US31)
Classification: Main-belt Asteroid          SPK-ID: 2049287
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08250892835069006 3.389e-08  
a 2.643505583013499 1.0568e-08 au
q 2.42539277026999 9.0215e-08 au
i 3.928802907329102 3.6747e-06 deg
node 68.14872879949837 5.5593e-05 deg
peri 264.3134245293627 6.0959e-05 deg
M 350.6836922616238 2.3853e-05 deg
tp 2458641.126564610071
(2019-Jun-06.62656461)
0.00010397 TDB
period 1569.888379639858
4.30
9.4142e-06
2.577e-08
d
yr
n .2293156664313843 1.3751e-09 deg/d
Q 2.86161839575701 1.144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1542  
   data-arc span      10549 days (28.88 yr)  
   first obs. used      1991-01-11  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50509  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:18:33  

Additional Information
 Earth MOID = 1.41784 au 
 Jupiter MOID = 2.40344 au 
 T_jup = 3.386 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO502484  
diameter diameter 5.572 km 0.201 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.143   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49287 (1998 US31)          Discovered 1998-Oct-22 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 US31 = 2000 DM14 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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