Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
26117 (1991 RX21)
Classification: Outer Main-belt Asteroid          SPK-ID: 2026117
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1117355549270564 5.2084e-08  
a 3.205285881608032 3.2771e-08 au
q 2.847141484926699 1.71e-07 au
i 14.44640839636511 7.6059e-06 deg
node 158.1572074194313 2.3219e-05 deg
peri 268.3487006573508 4.2172e-05 deg
M 19.42559036908482 3.3333e-05 deg
tp 2457287.397993811281
(2015-Sep-21.89799381)
0.00019424 JED
period 2096.035253205895
5.74
3.2145e-05
8.801e-08
d
yr
n .1717528364322014 2.634e-09 deg/d
Q 3.563430278289365 3.6433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      886  
   data-arc span      8898 days (24.36 yr)  
   first obs. used      1991-08-08  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49583  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 14:00:00  

Additional Information
 Earth MOID = 1.90687 au 
 Jupiter MOID = 1.82113 au 
 T_jup = 3.134 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9 mag n/a MPO319408  

26117 (1991 RX21)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar
Reference: 20010705/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RX21 = 1999 BK23 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-11 00:26 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin