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186221 (2001 WC79)
Classification: Main-belt Asteroid          SPK-ID: 2186221
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01510239330050905 4.1019e-08  
a 2.77551605321651 2.4483e-08 au
q 2.733599118168958 1.2089e-07 au
i 3.177833201025433 5.4495e-06 deg
node 59.26025341761497 0.00010657 deg
peri 33.3528607586824 0.00025139 deg
M 54.96115272986388 0.00022619 deg
tp 2459138.649858359246
(2020-Oct-16.14985836)
0.0010615 TDB
period 1688.939303127701
4.62
2.2347e-05
6.118e-08
d
yr
n .2131515320493317 2.8203e-09 deg/d
Q 2.817432988264063 2.4852e-08 au
  Orbit Determination Parameters
   # obs. used (total)      254  
   data-arc span      7558 days (20.69 yr)  
   first obs. used      2000-07-01  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53695  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:50:23  

Additional Information
 Earth MOID = 1.75055 au 
 Jupiter MOID = 2.18322 au 
 T_jup = 3.333 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457308.5 (2015-Oct-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01270565756506289 4.0843e-08  
q 2.739193541767944 1.1986e-07 au
tp 2457438.970057251079
(2016-Feb-20.47005725)
0.0012732 TDB
node 59.29042029229295 0.00010662 deg
peri 31.02207989935908 0.00029245 deg
i 3.178319599706632 5.4494e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      254  
   data-arc span      7558 days (20.69 yr)  
   first obs. used      2000-07-01  
   last obs. used      2021-03-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53695  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:50:23  

Additional Information
 Jupiter MOID = 2.18322 au 
 T_jup = 3.333 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.668170405518172E-15 -4.79929070537088E-15 -1.645005465656618E-12 1.084050824520863E-14 -3.447289278507326E-13 -7.009588850322704E-16
q -4.79929070537088E-15 1.436654808198731E-14 4.457374378563588E-13 -3.114574854896766E-14 6.381598320437443E-14 2.397343587690775E-15
tp -1.645005465656618E-12 4.457374378563588E-13 1.620989636387359E-6 1.845164039972345E-10 3.46761988447245E-7 5.713181384627061E-12
node 1.084050824520863E-14 -3.114574854896766E-14 1.845164039972345E-10 1.136797512353051E-8 -1.131065041403006E-8 -2.051567754237351E-10
peri -3.447289278507326E-13 6.381598320437443E-14 3.46761988447245E-7 -1.131065041403006E-8 8.552635622459688E-8 2.060414533095882E-10
i -7.009588850322704E-16 2.397343587690775E-15 5.713181384627061E-12 -2.051567754237351E-10 2.060414533095882E-10 2.969545521460387E-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 16.49   n/a MPCxxxxx  

186221 (2001 WC79)          Discovered 2001-Nov-20 by LINEAR at Socorro
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2045-Dec-17 09:22 00:06 Iris 0.0328036308580361 0.0327932988574516 0.032813965207842 3.70487325891046 3.70487321160865 2468331.890321158 6.2094512277488 678.470273973246 72.1068399437755 -40.9094296205589 44872.4229024796 T 16 CATAB v2.0f-lin.ifort 2021-Apr-13 21:50:24 2021-Apr-13 21:50

Alternate Designations
 2001 WC79 = 2005 RK41 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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