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JPL Small-Body Database Browser
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109498 (2001 QR231)
Classification: Main-belt Asteroid          SPK-ID: 2109498
[ 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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1962878618900563 3.8663e-08  
a 3.065507514483981 1.8845e-08 au
q 2.46378559885802 1.2216e-07 au
i 15.86596792628067 6.3241e-06 deg
node 191.6379591697534 1.6987e-05 deg
peri 275.158924782488 2.4039e-05 deg
M 351.7076384841988 1.6047e-05 deg
tp 2458645.657275460311
(2019-Jun-11.15727546)		 8.7446e-05 TDB
period 1960.433000265931
5.37		 1.8077e-05
4.949e-08		 d
yr
n .1836329014820534 1.6933e-09 deg/d
Q 3.667229430109943 2.2544e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1024  
   data-arc span      7514 days (20.57 yr)  
   first obs. used      1999-05-12  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51827  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 09:06:25  

Additional Information
 Earth MOID = 1.54105 au 
 Jupiter MOID = 1.7773 au 
 T_jup = 3.145 
[ 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 14.0   n/a MPO251085  
diameter diameter 7.747 km 0.229 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.047   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

109498 (2001 QR231)          Discovered 2001-Aug-24 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2001 QR231 = 2002 XV84 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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