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 ]  
16538 (1991 PO12)
Classification: Main-belt Asteroid          SPK-ID: 2016538
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1706500965293372 4.4377e-08  
a 2.268662813573735 9.1695e-09 au
q 1.88151528544486 1.0195e-07 au
i 5.124026630210424 4.0268e-06 deg
node 145.6905756048462 5.6243e-05 deg
peri 273.8329897420538 5.8431e-05 deg
M 32.8147464567275 1.5701e-05 deg
tp 2457486.732056486681
(2016-Apr-08.23205649)
5.4054e-05 JED
period 1248.111415969758
3.42
7.5669e-06
2.072e-08
d
yr
n .2884357881786435 1.7487e-09 deg/d
Q 2.655810341702611 1.0734e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1267  
   data-arc span      10460 days (28.64 yr)  
   first obs. used      1987-06-02  
   last obs. used      2016-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4833  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 19:10:59  

Additional Information
 Earth MOID = .900651 au 
 Jupiter MOID = 2.68191 au 
 T_jup = 3.590 
[ 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 14.0 mag n/a MPO358791  

16538 (1991 PO12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 PO12 = 1998 QA102 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-05 14:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin