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109539 (2001 QR251)
Classification: Main-belt Asteroid          SPK-ID: 2109539
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06803766629193053 4.9451e-08  
a 3.02969897562891 2.1675e-08 au
q 2.823565327760067 1.4988e-07 au
i 9.198878143327768 5.2915e-06 deg
node 178.1609546611179 2.6605e-05 deg
peri 138.7538730049315 4.0477e-05 deg
M 198.8157938501192 3.258e-05 deg
tp 2459862.917639609568
(2022-Oct-10.41763961)
0.00017727 TDB
period 1926.183449827252
5.27
2.067e-05
5.659e-08
d
yr
n .1868980859701013 2.0056e-09 deg/d
Q 3.235832623497753 2.3149e-08 au
  Orbit Determination Parameters
   # obs. used (total)      592  
   data-arc span      10494 days (28.73 yr)  
   first obs. used      1991-09-15  
   last obs. used      2020-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57113  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:11:25  

Additional Information
 Earth MOID = 1.81883 au 
 Jupiter MOID = 2.01551 au 
 T_jup = 3.220 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457313.5 (2015-Oct-18.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06683423390506089 4.9363e-08  
q 2.827644817154115 1.4909e-07 au
tp 2457933.197679905061
(2017-Jun-28.69767991)
0.00017455 TDB
node 178.184772873353 2.6601e-05 deg
peri 138.0833071771034 4.0924e-05 deg
i 9.198373658010951 5.2918e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      592  
   data-arc span      10494 days (28.73 yr)  
   first obs. used      1991-09-15  
   last obs. used      2020-06-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57113  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:11:25  

Additional Information
 Jupiter MOID = 2.01551 au 
 T_jup = 3.220 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.436701852386641E-15 -7.292362712222851E-15 1.74282986454192E-12 8.235169869070186E-15 3.062478259930251E-13 3.080503600324057E-15
q -7.292362712222851E-15 2.222908967667125E-14 -4.42549815312598E-12 -2.272205570923817E-14 -8.017924028669509E-13 -9.407594155057855E-15
tp 1.74282986454192E-12 -4.42549815312598E-12 3.046666127023377E-8 3.499579851161907E-12 5.448293299101571E-9 4.905256644112486E-13
node 8.235169869070186E-15 -2.272205570923817E-14 3.499579851161907E-12 7.076187610464394E-10 -6.975209171168542E-10 -4.670327168182203E-11
peri 3.062478259930251E-13 -8.017924028669509E-13 5.448293299101571E-9 -6.975209171168542E-10 1.674735454106326E-9 4.620637027816709E-11
i 3.080503600324057E-15 -9.407594155057855E-15 4.905256644112486E-13 -4.670327168182203E-11 4.620637027816709E-11 2.800277180104385E-11

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 15.0   n/a MPO426694  

109539 (2001 QR251)          Discovered 2001-Aug-25 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2001 QR251 = 1995 MW1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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