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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1960404689541497 3.0918e-08  
a 3.064332960367298 1.6292e-08 au
q 2.463599689785235 9.3326e-08 au
i 15.8678165826868 5.5863e-06 deg
node 191.630564631113 1.2973e-05 deg
peri 275.0949528561583 2.1258e-05 deg
M 65.24847351714016 1.4451e-05 deg
tp 2458645.384024064647
(2019-Jun-10.88402406)
7.8843e-05 TDB
period 1959.306393629946
5.36
1.5626e-05
4.278e-08
d
yr
n .1837384909121024 1.4653e-09 deg/d
Q 3.665066230949361 1.9486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1260  
   data-arc span      7685 days (21.04 yr)  
   first obs. used      1999-05-12  
   last obs. used      2020-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4969  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:11:41  

Additional Information
 Earth MOID = 1.54071 au 
 Jupiter MOID = 1.77781 au 
 T_jup = 3.146 
[ 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 14.1   n/a MPO469120  
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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