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7061 Pieri (1991 PE1)
Classification: Main-belt Asteroid          SPK-ID: 2007061
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .254110077603006 7.0294e-08  
a 3.124876290706041 2.812e-08 AU
q 2.330813733974935 2.1608e-07 AU
i 18.96826999901382 7.931e-06 deg
node 137.5342757739225 2.1138e-05 deg
peri 173.6903875897169 2.4842e-05 deg
M 84.94823199092342 1.4506e-05 deg
tp 2456524.398539281021
(2013-Aug-19.89853928)
7.8034e-05 JED
period 2017.658541464946
5.52
2.7235e-05
7.457e-08
d
yr
n .178424640543299 2.4084e-09 deg/d
Q 3.918938847437147 3.5266e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      891  
   data-arc span      9082 days (24.87 yr)  
   first obs. used      1990-04-29  
   last obs. used      2015-03-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54126  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:27:08  

Additional Information
 Earth MOID = 1.31859 AU 
 T_jup = 3.083 
[ 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 12.6 mag n/a MPO319173  

7061 Pieri           Discovered 1991 Aug. 15 by E. F. Helin at Palomar.
David C. Pieri (b. 1949), a staff scientist in the Earth and Space Sciences Division at the Jet Propulsion Laboratory since 1979, has research interests in volcanology, fluvial geomorphology, and planetary geology.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000320/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1991 PE1 = 1990 HH3 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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