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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1709393528183373 4.8138e-08  
a 2.268907479567301 1.0025e-08 AU
q 1.881061903405381 1.092e-07 AU
i 5.123867228742127 4.0517e-06 deg
node 145.6925186939549 6.1508e-05 deg
peri 273.8303823079297 6.3499e-05 deg
M 219.7968040687334 1.5202e-05 deg
tp 2457486.659772124618
(2016-Apr-08.15977212)
5.437e-05 JED
period 1248.313326970545
3.42
8.2737e-06
2.265e-08
d
yr
n .2883891345401735 1.9114e-09 deg/d
Q 2.65675305572922 1.1739e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1119  
   data-arc span      10305 days (28.21 yr)  
   first obs. used      1987-06-02  
   last obs. used      2015-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48206  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:45:55  

Additional Information
 Earth MOID = .901413 AU 
 T_jup = 3.589 
[ 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
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1991 PO12 = 1998 QA102 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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