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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09710292651508867 4.041e-08  
a 2.801808297698153 1.3172e-08 au
q 2.529744512457403 1.1438e-07 au
i 1.712424500181527 3.8302e-06 deg
node 230.860632930892 0.00012228 deg
peri 143.0269836165002 0.0001237 deg
M 226.3830237700259 2.1306e-05 deg
tp 2460032.292193527944
(2023-Mar-28.79219353)		 0.00010344 TDB
period 1712.994831406117
4.69		 1.208e-05
3.307e-08		 d
yr
n .2101582523191228 1.4821e-09 deg/d
Q 3.073872082938902 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-Jul-08 18:31:22  

Additional Information
 Earth MOID = 1.52976 au 
 Jupiter MOID = 2.39473 au 
 T_jup = 3.317 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.89   n/a E2021B10  
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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