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 ]  
12212 (1981 QR2)
Classification: Main-belt Asteroid          SPK-ID: 2012212
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2376521074048868 6.4065e-08  
a 2.336058423302352 1.1323e-08 AU
q 1.780889215983611 1.5112e-07 AU
i 3.692774726924512 6.7697e-06 deg
node 346.304665631426 7.7312e-05 deg
peri 323.0541152910321 7.7975e-05 deg
M 130.3872622647212 1.1332e-05 deg
tp 2456528.157914620603
(2013-Aug-23.65791462)
3.9349e-05 JED
period 1304.139283109952
3.57
9.4822e-06
2.596e-08
d
yr
n .2760441347503283 2.0071e-09 deg/d
Q 2.891227630621094 1.4014e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      924  
   data-arc span      12258 days (33.56 yr)  
   first obs. used      1981-08-23  
   last obs. used      2015-03-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48921  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:43:26  

Additional Information
 Earth MOID = .76914 AU 
 T_jup = 3.526 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8 mag n/a MPO332934  

12212 (1981 QR2)          Discovered 1981-Aug-23 by Debehogne, H. at La Silla
Reference: 19991123/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 QR2 = 1998 FN28 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Aug-31 04:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin