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21197 (1994 PS7)
Classification: Main-belt Asteroid          SPK-ID: 2021197
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09710292650943116 4.041e-08  
a 2.801808297715637 1.3172e-08 au
q 2.529744512489041 1.1438e-07 au
i 1.712424500170459 3.8302e-06 deg
node 230.8606329304327 0.00012228 deg
peri 143.026983618761 0.0001237 deg
M 226.3830237671629 2.1306e-05 deg
tp 2460032.292193547518
(2023-Mar-28.79219355)
0.00010344 TDB
period 1712.994831422152
4.69
1.208e-05
3.307e-08
d
yr
n .2101582523171555 1.4821e-09 deg/d
Q 3.073872082942233 1.4451e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1374  
   data-arc span      10693 days (29.28 yr)  
   first obs. used      1992-03-02  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48651  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:26  

Additional Information
 Earth MOID = 1.52976 au 
 Jupiter MOID = 2.39473 au 
 T_jup = 3.317 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457580.5 (2016-Jul-11.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09558361628618635 4.0345e-08  
q 2.53556929917941 1.1395e-07 au
tp 2458319.535378057801
(2018-Jul-20.03537806)
9.9766e-05 TDB
node 230.8856458098403 0.00012236 deg
peri 143.1366749933652 0.00012382 deg
i 1.711125735856246 3.829e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1374  
   data-arc span      10693 days (29.28 yr)  
   first obs. used      1992-03-02  
   last obs. used      2021-06-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48651  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 14:58:26  

Additional Information
 Jupiter MOID = 2.39473 au 
 T_jup = 3.317 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.627751819066283E-15 -4.572342250370898E-15 5.516328640233921E-13 -1.029339062305299E-15 6.849692976495958E-14 1.910658408728374E-16
q -4.572342250370898E-15 1.29848271639465E-14 -1.106128094832517E-12 3.127278759566739E-15 -1.202935305853314E-13 -4.914897244271372E-16
tp 5.516328640233921E-13 -1.106128094832517E-12 9.953189559049346E-9 1.679947538113539E-11 1.906898613729629E-9 -1.328498704219975E-12
node -1.029339062305299E-15 3.127278759566739E-15 1.679947538113539E-11 1.497136536357836E-8 -1.496093257241539E-8 -1.063890366980177E-10
peri 6.849692976495958E-14 -1.202935305853314E-13 1.906898613729629E-9 -1.496093257241539E-8 1.533172407639924E-8 1.060790671778254E-10
i 1.910658408728374E-16 -4.914897244271372E-16 -1.328498704219975E-12 -1.063890366980177E-10 1.060790671778254E-10 1.466132951749958E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.90   n/a MPO636382  
diameter diameter 3.955 km 0.248 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.163   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21197 (1994 PS7)          Discovered 1994-Aug-10 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PS7 = 1999 TQ30 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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