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100221 (1994 PP12)
Classification: Main-belt Asteroid          SPK-ID: 2100221
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04525956650547474 5.2763e-08  
a 2.51912299641479 1.3944e-08 au
q 2.405108581623084 1.3305e-07 au
i 1.993396746774163 5.1424e-06 deg
node 204.5478992106696 0.0001347 deg
peri 122.9585532902896 0.00014363 deg
M 167.9514469500801 4.8506e-05 deg
tp 2458319.175926058871
(2018-Jul-19.67592606)
0.00019603 TDB
period 1460.402223814776
4.00
1.2126e-05
3.32e-08
d
yr
n .2465074307129096 2.0468e-09 deg/d
Q 2.633137411206496 1.4575e-08 au
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      9408 days (25.76 yr)  
   first obs. used      1994-08-10  
   last obs. used      2020-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55162  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:07:23  

Additional Information
 Earth MOID = 1.39404 au 
 Jupiter MOID = 2.4992 au 
 T_jup = 3.455 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456589.5 (2013-Oct-24.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04633064258872018 5.2729e-08  
q 2.402323359828044 1.331e-07 au
tp 2456853.842040543177
(2014-Jul-15.34204054)
0.00019091 TDB
node 204.6076865888873 0.00013496 deg
peri 121.7183598743777 0.00014354 deg
i 1.990501448871189 5.143e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      9408 days (25.76 yr)  
   first obs. used      1994-08-10  
   last obs. used      2020-05-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55162  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:07:23  

Additional Information
 Jupiter MOID = 2.4992 au 
 T_jup = 3.455 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.780328345998289E-15 -6.983475034900521E-15 3.542707579398857E-12 -4.890974704128249E-14 9.465509188851596E-13 -1.115490922309484E-15
q -6.983475034900521E-15 1.771604666353487E-14 -8.765190306120017E-12 1.237270033927985E-13 -2.353239044902255E-12 2.840768269200279E-15
tp 3.542707579398857E-12 -8.765190306120017E-12 3.644581907495871E-8 -4.543490212378789E-11 9.361606559095055E-9 -4.716148902467786E-12
node -4.890974704128249E-14 1.237270033927985E-13 -4.543490212378789E-11 1.821315700774711E-8 -1.82132845998611E-8 -3.27533391435138E-10
peri 9.465509188851596E-13 -2.353239044902255E-12 9.361606559095055E-9 -1.82132845998611E-8 2.060497140659972E-8 3.261276648204144E-10
i -1.115490922309484E-15 2.840768269200279E-15 -4.716148902467786E-12 -3.27533391435138E-10 3.261276648204144E-10 2.645047540515242E-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 15.7   n/a MPO453456  

100221 (1994 PP12)          Discovered 1994-Aug-10 by Elst, E. W. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1994 PP12 = 2001 HS43 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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