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21209 (1994 PO30)
Classification: Main-belt Asteroid          SPK-ID: 2021209
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1213687377468354 4.0354e-08  
a 2.851583759821612 1.5065e-08 au
q 2.505490638312688 1.1755e-07 au
i 4.60491879439412 4.3642e-06 deg
node 204.4417185041826 5.3672e-05 deg
peri 152.462160856413 5.6386e-05 deg
M 152.3608760337904 1.7546e-05 deg
tp 2458456.113332174054
(2018-Dec-03.61333217)
8.489e-05 TDB
period 1758.8452324067
4.82
1.3938e-05
3.816e-08
d
yr
n .2046797486026654 1.622e-09 deg/d
Q 3.197676881330537 1.6893e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1319  
   data-arc span      10549 days (28.88 yr)  
   first obs. used      1992-03-02  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50206  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:51:22  

Additional Information
 Earth MOID = 1.50095 au 
 Jupiter MOID = 2.2613 au 
 T_jup = 3.290 
[ 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 14.18   n/a E2021B10  
diameter diameter 6.519 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.114   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21209 (1994 PO30)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PO30 = 1998 KF45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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