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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1707451643974812 4.4391e-08  
a 2.268896202214388 9.2453e-09 au
q 1.881493147166472 1.0199e-07 au
i 5.124035878601996 4.0314e-06 deg
node 145.6915393984578 5.627e-05 deg
peri 273.8255712110024 5.8457e-05 deg
M 335.1358681482305 1.5526e-05 deg
tp 2457486.716654850853
(2016-Apr-08.21665485)
5.4126e-05 JED
period 1248.304020077756
3.42
7.6299e-06
2.089e-08
d
yr
n .2883912846628307 1.7627e-09 deg/d
Q 2.656299257262305 1.0824e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1256  
   data-arc span      10410 days (28.50 yr)  
   first obs. used      1987-06-02  
   last obs. used      2015-12-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47833  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:34:09  

Additional Information
 Earth MOID = .901233 au 
 Jupiter MOID = 2.68309 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 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 ]
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