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16548 (1991 RR9)
Classification: Main-belt Asteroid          SPK-ID: 2016548
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2512125231676803 7.0889e-08  
a 2.340732311917468 1.6693e-08 au
q 1.752711041780563 1.6695e-07 au
i 3.290585835671616 6.7066e-06 deg
node 347.0752579747558 0.000102 deg
peri 6.315270222752113 0.00010256 deg
M 286.1452045668281 1.6183e-05 deg
tp 2457668.850402510104
(2016-Oct-07.35040251)
6.0514e-05 JED
period 1308.055141673937
3.58
1.3993e-05
3.831e-08
d
yr
n .2752177553763542 2.9441e-09 deg/d
Q 2.928753582054373 2.0887e-08 au
  Orbit Determination Parameters
   # obs. used (total)      783  
   data-arc span      14197 days (38.87 yr)  
   first obs. used      1976-06-28  
   last obs. used      2015-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5621  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:26:40  

Additional Information
 Earth MOID = .74566 au 
 Jupiter MOID = 2.50219 au 
 T_jup = 3.519 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9 mag n/a MPO250375  

16548 (1991 RR9)          Discovered 1991-Sep-10 by Holt, H. E. at Palomar
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 RR9 = 1998 QS7 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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