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181981 (1999 VC71)
Classification: Main-belt Asteroid          SPK-ID: 2181981
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2547451292632872 4.536e-08  
a 3.055637370495258 1.4034e-08 au
q 2.277228633566713 1.4075e-07 au
i 2.327069132114621 3.5157e-06 deg
node 93.21476278613211 0.00012645 deg
peri 265.9492360004297 0.00012679 deg
M 19.81854488741466 7.1731e-06 deg
tp 2459093.096011357340
(2020-Aug-31.59601136)
3.8972e-05 TDB
period 1950.972492229306
5.34
1.3441e-05
3.68e-08
d
yr
n .184523360238996 1.2713e-09 deg/d
Q 3.834046107423804 1.761e-08 au
  Orbit Determination Parameters
   # obs. used (total)      675  
   data-arc span      7771 days (21.28 yr)  
   first obs. used      1999-11-04  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49376  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:51  

Additional Information
 Earth MOID = 1.27361 au 
 Jupiter MOID = 1.62184 au 
 T_jup = 3.184 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457873.5 (2017-Apr-30.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2592684370114054 4.532e-08  
q 2.259883121430925 1.4115e-07 au
tp 2457144.464321649074
(2015-May-01.96432165)
4.2096e-05 TDB
node 93.26460958584462 0.0001268 deg
peri 266.1518247709066 0.00012713 deg
i 2.326830055945082 3.5173e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      675  
   data-arc span      7771 days (21.28 yr)  
   first obs. used      1999-11-04  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49376  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:51  

Additional Information
 Jupiter MOID = 1.62184 au 
 T_jup = 3.184 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.053923919465835E-15 -6.379958938634982E-15 6.29768259116954E-13 1.006484627261737E-14 7.573222120852312E-14 -3.270633807696973E-15
q -6.379958938634982E-15 1.99237751838192E-14 -2.145605004763444E-12 -2.854511865016974E-14 -2.697831765989579E-13 1.023354690718506E-14
tp 6.29768259116954E-13 -2.145605004763444E-12 1.772067121915534E-9 -4.959620462675891E-12 4.132737565247725E-10 -1.458741166450574E-12
node 1.006484627261737E-14 -2.854511865016974E-14 -4.959620462675891E-12 1.607831037146749E-8 -1.606613407413842E-8 -1.235749054973622E-10
peri 7.573222120852312E-14 -2.697831765989579E-13 4.132737565247725E-10 -1.606613407413842E-8 1.616103563152719E-8 1.232386963317199E-10
i -3.270633807696973E-15 1.023354690718506E-14 -1.458741166450574E-12 -1.235749054973622E-10 1.232386963317199E-10 1.237131851736755E-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 15.79   n/a E2021B55  

181981 (1999 VC71)          Discovered 1999-Nov-04 by LINEAR at Socorro
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

[ show close-approach data ]
Alternate Designations
 1999 VC71 = 2004 RC69 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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