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216771 (2005 WC45)
Classification: Outer Main-belt Asteroid          SPK-ID: 2216771
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04348516963285904 6.1373e-08  
a 3.970866850670877 7.4142e-08 au
q 3.798193032079957 2.3197e-07 au
i .7476867290975379 6.037e-06 deg
node 247.7559840529696 0.00049282 deg
peri 282.6376611635087 0.00049871 deg
M 253.0173809674174 7.8358e-05 deg
tp 2460255.389194140870
(2023-Nov-06.88919414)
0.00064292 TDB
period 2890.1901326284
7.91
8.0946e-05
2.216e-07
d
yr
n .1245592793137829 3.4885e-09 deg/d
Q 4.143540669261797 7.7366e-08 au
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      7167 days (19.62 yr)  
   first obs. used      2001-04-24  
   last obs. used      2020-12-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59659  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:13  

Additional Information
 Earth MOID = 2.80467 au 
 Jupiter MOID = .831884 au 
 T_jup = 3.056 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457358.5 (2015-Dec-02.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04783563179642808 6.2626e-08  
q 3.798440226032803 2.4124e-07 au
tp 2457413.110917656012
(2016-Jan-25.61091766)
0.00052725 TDB
node 248.4887584469016 0.00049946 deg
peri 287.913462919691 0.00050397 deg
i .7402121071069313 5.997e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      225  
   data-arc span      7167 days (19.62 yr)  
   first obs. used      2001-04-24  
   last obs. used      2020-12-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59659  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:56:13  

Additional Information
 Jupiter MOID = .831884 au 
 T_jup = 3.056 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.922068494284869E-15 -1.44619876020749E-14 1.125469669637268E-11 1.455788482271542E-14 1.442677246900711E-12 -7.13873506089931E-16
q -1.44619876020749E-14 5.819596552281288E-14 -2.704659379851353E-11 -1.11853814679931E-14 -3.561362487598277E-12 1.226741246245309E-15
tp 1.125469669637268E-11 -2.704659379851353E-11 2.779929958602291E-7 -4.443697643375427E-10 3.556077772090356E-8 1.19548508689455E-11
node 1.455788482271542E-14 -1.11853814679931E-14 -4.443697643375427E-10 2.494618292965656E-7 -2.49497380869832E-7 -8.869334878762353E-10
peri 1.442677246900711E-12 -3.561362487598277E-12 3.556077772090356E-8 -2.49497380869832E-7 2.539867810060278E-7 8.883877943072567E-10
i -7.13873506089931E-16 1.226741246245309E-15 1.19548508689455E-11 -8.869334878762353E-10 8.883877943072567E-10 3.596371067078665E-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 15.21   n/a MPCxxxxx  

216771 (2005 WC45)          Discovered 2005-Nov-22 by Spacewatch at Kitt Peak
Reference: 20090707/Numbers.arcLast Updated: 2009-07-09

[ show close-approach data ]
Alternate Designations
 2005 WC45 = 2007 CN9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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