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31396 (1998 YQ12)
Classification: Main-belt Asteroid          SPK-ID: 2031396
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1020316624825162 2.986e-08  
a 2.301470610303702 8.132e-09 au
q 2.066647737779764 6.9199e-08 au
i 8.270167785252703 3.3647e-06 deg
node 102.5794185537392 2.7509e-05 deg
peri 166.9438170890162 3.4629e-05 deg
M 262.2152834083615 2.2432e-05 deg
tp 2459346.897746069642
(2021-May-12.39774607)
7.9916e-05 TDB
period 1275.283018979823
3.49
6.7591e-06
1.851e-08
d
yr
n .2822902796023945 1.4962e-09 deg/d
Q 2.53629348282764 8.9617e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1838  
   data-arc span      14439 days (39.53 yr)  
   first obs. used      1980-11-29  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50375  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:01:18  

Additional Information
 Earth MOID = 1.05127 au 
 Jupiter MOID = 2.54489 au 
 T_jup = 3.570 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457218.5 (2015-Jul-15.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1026005225827922 2.9803e-08  
q 2.065138196681578 6.9116e-08 au
tp 2456796.165770089323
(2014-May-18.66577009)
7.7207e-05 TDB
node 102.6245458173842 2.7513e-05 deg
peri 166.8847646321639 3.4583e-05 deg
i 8.270056175275499 3.3648e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1838  
   data-arc span      14439 days (39.53 yr)  
   first obs. used      1980-11-29  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50375  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:01:18  

Additional Information
 Jupiter MOID = 2.54489 au 
 T_jup = 3.570 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.881986822184239E-16 -2.048412290232555E-15 -1.94359000104215E-13 -1.666056183883862E-15 -3.848187679767821E-14 1.097611485196217E-16
q -2.048412290232555E-15 4.77699672070768E-15 4.975911257374432E-13 3.927696153087977E-15 1.053953395358242E-13 -1.476010598120711E-16
tp -1.94359000104215E-13 4.975911257374432E-13 5.960873923699741E-9 -3.207662655210527E-12 1.634157609323993E-9 2.600405497795096E-12
node -1.666056183883862E-15 3.927696153087977E-15 -3.207662655210527E-12 7.569514401531024E-10 -7.496405630868744E-10 8.539538038671529E-12
peri -3.848187679767821E-14 1.053953395358242E-13 1.634157609323993E-9 -7.496405630868744E-10 1.195955739186012E-9 -7.735412552454269E-12
i 1.097611485196217E-16 -1.476010598120711E-16 2.600405497795096E-12 8.539538038671529E-12 -7.735412552454269E-12 1.132203518246731E-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 14.5   n/a MPO358921  
diameter diameter 2.966 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.349   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

31396 (1998 YQ12)          Discovered 1998-Dec-29 by Kobayashi, T. at Oizumi
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 YQ12 = 1980 WF4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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