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 ]  
55754 (1991 RP18)
Classification: Main-belt Asteroid          SPK-ID: 2055754
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .196075402587525 5.2306e-08  
a 2.240437345669756 1.347e-08 au
q 1.801142691145432 1.2101e-07 au
i 1.234529349805172 6.21e-06 deg
node 317.7730609765153 0.0002413 deg
peri 39.63447047116159 0.00024162 deg
M 87.98746882005301 1.8881e-05 deg
tp 2457101.124707328009
(2015-Mar-19.62470733)
6.2578e-05 JED
period 1224.891530660261
3.35
1.1046e-05
3.024e-08
d
yr
n .2939035751238699 2.6505e-09 deg/d
Q 2.679732000194079 1.6111e-08 au
  Orbit Determination Parameters
   # obs. used (total)      512  
   data-arc span      8862 days (24.26 yr)  
   first obs. used      1991-09-13  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60827  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 15:17:55  

Additional Information
 Earth MOID = .795331 au 
 Jupiter MOID = 2.75684 au 
 T_jup = 3.609 
[ 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 16.1 mag n/a MPO259697  

55754 (1991 RP18)          Discovered 1991-Sep-13 by Holt, H. E. at Palomar
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RP18 = 1997 HX13 = 2000 GE12 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Feb-12 14:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin