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 ]  
12731 (1991 RW12)
Classification: Main-belt Asteroid          SPK-ID: 2012731
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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04876244579811639 4.4257e-08  
a 2.420824802215587 1.6855e-08 AU
q 2.302779464010813 1.0299e-07 AU
i 3.736753341299097 5.9939e-06 deg
node 187.9136911087529 6.9475e-05 deg
peri 101.67226641642 0.00010277 deg
M 122.8255651071237 7.9426e-05 deg
tp 2456531.114426635456
(2013-Aug-26.61442664)
0.00030083 JED
period 1375.762499149578
3.77
1.4368e-05
3.934e-08
d
yr
n .2616730723671656 2.7329e-09 deg/d
Q 2.53887014042036 1.7677e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1278  
   data-arc span      22440 days (61.44 yr)  
   first obs. used      1953-08-15  
   last obs. used      2015-01-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45762  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:35:46  

Additional Information
 Earth MOID = 1.29144 AU 
 T_jup = 3.509 
[ 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 13.7 mag n/a MPO324426  

12731 (1991 RW12)          Discovered 1991-Sep-10 by Holt, H. E. at Palomar (675)
Reference: 19991222/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 RW12 = 1953 PK1 = 1976 SO9 = 1998 MG26 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2015-Mar-01 02:56 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin