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 ]  
7181 (1991 PH12)
Classification: Main-belt Asteroid          SPK-ID: 2007181
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1352514299599145 6.5337e-08  
a 3.089956545137044 2.7415e-08 AU
q 2.672035503893262 2.0299e-07 AU
i 11.64900456527552 8.3654e-06 deg
node 291.1926263643448 3.3569e-05 deg
peri 148.3284373968301 5.0452e-05 deg
M 21.29154379054177 3.3338e-05 deg
tp 2456883.163903547704
(2014-Aug-13.66390355)
0.00018385 JED
period 1983.932923717397
5.43
2.6403e-05
7.229e-08
d
yr
n .1814577477374837 2.4149e-09 deg/d
Q 3.507877586380827 3.1123e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      949  
   data-arc span      22439 days (61.43 yr)  
   first obs. used      1953-09-16  
   last obs. used      2015-02-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .46246  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:07:38  

Additional Information
 Earth MOID = 1.69547 AU 
 T_jup = 3.180 
[ 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 12.3 mag n/a MPO279590  

7181 (1991 PH12)          Discovered 1991-Aug-07 by Holt, H. E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 PH12 = 1986 RN4 = 1986 TU2 = 1986 VK9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Apr-01 13:12 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin