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 ]  
17544 Kojiroishikawa (1993 RF2)
Classification: Main-belt Asteroid          SPK-ID: 2017544
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 .1834012229519942 3.634e-08  
a 2.258919736952372 8.2105e-09 au
q 1.84463109464491 8.0966e-08 au
i 4.805265194011252 4.6859e-06 deg
node 353.6384733210717 4.2846e-05 deg
peri 326.1480079777937 4.5697e-05 deg
M 340.1667536464472 1.9469e-05 deg
tp 2459068.818910592619
(2020-Aug-07.31891059)
6.7268e-05 TDB
period 1240.07978194337
3.40
6.761e-06
1.851e-08
d
yr
n .2903039024116918 1.5828e-09 deg/d
Q 2.673208379259834 9.7164e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1774  
   data-arc span      15568 days (42.62 yr)  
   first obs. used      1976-09-24  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50411  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:31:37  

Additional Information
 Earth MOID = .834286 au 
 Jupiter MOID = 2.63745 au 
 T_jup = 3.594 
[ 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 14.2   n/a MPO384905  
diameter diameter 3.507 km 0.085 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.362   0.067 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17544 Kojiroishikawa           Discovered 1993 Sept. 15 by K. Endate and K. Watanabe at Kitami.
Kojiro Ishikawa (b. 1947) is a Japanese amateur astronomer who has been very active in popularizing astronomy since he was a high school student. Since 1980 he has visited New Zealand frequently to take photographs of the southern sky.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-04-22Last Updated: 2016-04-25

[ show close-approach data ]
Alternate Designations
 1993 RF2 = 1976 SB2 
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 14:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin