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 ]  
8172 (1991 RP15)
Classification: Main-belt Asteroid          SPK-ID: 2008172
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511228908727581 4.6888e-08  
a 3.068418639687311 2.0963e-08 au
q 2.604710344449909 1.4351e-07 au
i 1.44683850430034 5.2975e-06 deg
node 47.50493568753269 0.00022362 deg
peri 15.59872984369682 0.00022442 deg
M 166.95390538162 2.0539e-05 deg
tp 2456690.032543623677
(2014-Feb-01.53254362)
0.00010977 JED
period 1963.226218316187
5.38
2.0119e-05
5.508e-08
d
yr
n .1833716342219408 1.8792e-09 deg/d
Q 3.532126934924714 2.4131e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1385  
   data-arc span      14807 days (40.54 yr)  
   first obs. used      1975-10-03  
   last obs. used      2016-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49556  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:01:26  

Additional Information
 Earth MOID = 1.6163 au 
 Jupiter MOID = 1.79135 au 
 T_jup = 3.213 
[ 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 13.1 mag n/a MPO337324  

8172 (1991 RP15)          Discovered 1991-Sep-15 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 RP15 = 1975 TK2 = 1975 VA2 = 1982 BE11 = 1986 TE18 = 1986 VO6 = 1988 CY6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-Apr-29 01:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin