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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1710875351156897 5.9698e-08  
a 2.268624378697789 1.2646e-08 AU
q 1.880491025643021 1.3234e-07 AU
i 5.123786651100265 4.9083e-06 deg
node 145.6966746385791 7.0808e-05 deg
peri 273.8260029271535 7.4184e-05 deg
M 162.1171261577897 1.7234e-05 deg
tp 2456238.458072390553
(2012-Nov-06.95807239)
5.943e-05 JED
period 1248.079698516656
3.42
1.0436e-05
2.857e-08
d
yr
n .288443118198189 2.4118e-09 deg/d
Q 2.656757731752557 1.481e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      993  
   data-arc span      9781 days (26.78 yr)  
   first obs. used      1987-06-02  
   last obs. used      2014-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52119  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 11:07:17  

Additional Information
 Earth MOID = .900173 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 13.9 mag n/a PDS3 (MPO 2862)  

16538 (1991 PO12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar (675)
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 2014-Apr-17 12:33 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin