Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
21665 Frege (1999 RR1)
Classification: Main-belt Asteroid          SPK-ID: 2021665
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1262557511796791 4.3028e-08  
a 2.271142206680425 1.1124e-08 au
q 1.984397441340114 1.0162e-07 au
i 2.868516969388595 4.6784e-06 deg
node 309.0953475879772 9.1121e-05 deg
peri 287.5859442599345 9.3378e-05 deg
M 123.6138523796395 2.2541e-05 deg
tp 2458571.230967335231
(2019-Mar-28.73096734)
7.6903e-05 TDB
period 1250.158042843835
3.42
9.1852e-06
2.515e-08
d
yr
n .2879635915320586 2.1157e-09 deg/d
Q 2.557886972020736 1.2529e-08 au
  Orbit Determination Parameters
   # obs. used (total)      866  
   data-arc span      12794 days (35.03 yr)  
   first obs. used      1984-01-25  
   last obs. used      2019-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57175  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:59:01  

Additional Information
 Earth MOID = .974824 au 
 Jupiter MOID = 2.44954 au 
 T_jup = 3.600 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO435901  

21665 Frege           Discovered 1999 Sept. 5 by P. G. Comba at Prescott.
Friedrich Ludwig Gottlob Frege (1848-1925), a professor at Jena, devoted his work to the goal of establishing the logical foundations of arithmetic. He introduced symbols for the concepts---now widely used in logic---of assertion, negation, implication and existential and universal quantifier.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

[ show close-approach data ]
Alternate Designations
 1999 RR1 = 1984 BK2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Mar-30 14:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin