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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2541100594497308 7.6533e-08  
a 3.124876293376058 2.8507e-08 AU
q 2.330813792693214 2.3729e-07 AU
i 18.96827263336004 8.6387e-06 deg
node 137.534278554767 2.1412e-05 deg
peri 173.6903828466824 2.5246e-05 deg
M 84.94823229668259 1.451e-05 deg
tp 2456524.398536957161
(2013-Aug-19.89853696)
7.8079e-05 JED
period 2017.658544050897
5.52
2.7609e-05
7.559e-08
d
yr
n .1784246403146195 2.4415e-09 deg/d
Q 3.918938794058902 3.575e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      832  
   data-arc span      8980 days (24.59 yr)  
   first obs. used      1990-04-29  
   last obs. used      2014-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55232  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 00:19:39  

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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