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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2484881156585365 3.8569e-08  
a 2.361034316346546 9.347e-09 au
q 1.774345348072452 9.0468e-08 au
i 5.618128475425454 4.6708e-06 deg
node 166.0879659650327 3.8656e-05 deg
peri 166.6681132041718 3.9955e-05 deg
M 1.107378161430159 1.444e-05 deg
tp 2459392.423895311249
(2021-Jun-26.92389531)
5.3134e-05 TDB
period 1325.109830642942
3.63
7.8689e-06
2.154e-08
d
yr
n .2716755937319765 1.6133e-09 deg/d
Q 2.94772328462064 1.167e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1327  
   data-arc span      13544 days (37.08 yr)  
   first obs. used      1984-05-30  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54478  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:36:00  

Additional Information
 Earth MOID = .764017 au 
 Jupiter MOID = 2.43768 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 14.89   n/a MPCxxxxx  
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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