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21661 Olgagermani (1999 RA)
Classification: Main-belt Asteroid          SPK-ID: 2021661
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2484036028671161 3.8741e-08  
a 2.360476531289905 9.5965e-09 au
q 1.77412565643422 9.083e-08 au
i 5.617421877929585 4.7052e-06 deg
node 166.0964895969344 3.8984e-05 deg
peri 166.726966804991 4.0391e-05 deg
M 307.8008360343798 1.5172e-05 deg
tp 2459392.569764424084
(2021-Jun-27.06976442)
5.6738e-05 TDB
period 1324.640280411603
3.63
8.078e-06
2.212e-08
d
yr
n .2717718956033391 1.6573e-09 deg/d
Q 2.946827406145591 1.198e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1286  
   data-arc span      13144 days (35.99 yr)  
   first obs. used      1984-05-30  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54765  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:55:40  

Additional Information
 Earth MOID = .762677 au 
 Jupiter MOID = 2.43898 au 
 T_jup = 3.503 
[ 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 14.88   n/a E2021B10  
diameter diameter 5.736 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.069   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21661 Olgagermani           Discovered 1999 Sept. 1 by G. Masi at Ceccano.
Italian poetess Olga Germani (1900-1983) worked with young students and performed for school festivities and charity.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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