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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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .248488115613919 3.8558e-08  
a 2.361034316289119 8.2812e-09 au
q 1.774345348134638 9.037e-08 au
i 5.618128577386138 4.666e-06 deg
node 166.0879701717975 3.7953e-05 deg
peri 166.6681089622747 3.9086e-05 deg
M 1.10737825777826 1.2539e-05 deg
tp 2459392.423894956754
(2021-Jun-26.92389496)
4.6141e-05 TDB
period 1325.109830594596
3.63
6.9717e-06
1.909e-08
d
yr
n .2716755937418884 1.4293e-09 deg/d
Q 2.947723284443599 1.0339e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1416  
   data-arc span      13585 days (37.19 yr)  
   first obs. used      1984-05-30  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53004  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:44:54  

Additional Information
 Earth MOID = .764017 au 
 Jupiter MOID = 2.43768 au 
 T_jup = 3.503 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456687.5 (2014-Jan-30.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2487320826980675 3.8566e-08  
q 1.773342353387168 9.0402e-08 au
tp 2456740.544964257037
(2014-Mar-24.04496426)
3.7594e-05 TDB
node 166.1386020428363 3.8005e-05 deg
peri 166.2700951283305 3.912e-05 deg
i 5.612499690287243 4.6631e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1416  
   data-arc span      13585 days (37.19 yr)  
   first obs. used      1984-05-30  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53004  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:44:54  

Additional Information
 Jupiter MOID = 2.43768 au 
 T_jup = 3.503 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.487359747616946E-15 -3.478404880540548E-15 4.085809084362134E-13 -7.60193571605429E-15 1.189437956935093E-13 4.22196329327646E-16
q -3.478404880540548E-15 8.172441446785307E-15 -8.491985079006019E-13 1.597234750699253E-14 -2.54174401862857E-13 -9.366965561516123E-16
tp 4.085809084362134E-13 -8.491985079006019E-13 1.413331453100454E-9 -1.65746625153763E-11 3.599278042835057E-10 -2.831963258144955E-13
node -7.60193571605429E-15 1.597234750699253E-14 -1.65746625153763E-11 1.44439372094275E-9 -1.441073745592523E-9 3.21515656488936E-11
peri 1.189437956935093E-13 -2.54174401862857E-13 3.599278042835057E-10 -1.441073745592523E-9 1.530366959111652E-9 -3.209520415848865E-11
i 4.22196329327646E-16 -9.366965561516123E-16 -2.831963258144955E-13 3.21515656488936E-11 -3.209520415848865E-11 2.174420729264689E-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 14.92   n/a MPO636389  
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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