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12722 Petrarca (1991 PT1)
Classification: Main-belt Asteroid          SPK-ID: 2012722
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1463213330502579 2.8333e-08  
a 2.309363618754695 6.3785e-09 au
q 1.971454455560741 6.4474e-08 au
i 3.344399625548062 3.3444e-06 deg
node 191.1658829682337 5.747e-05 deg
peri 38.31225334483387 5.892e-05 deg
M 147.024244339387 1.2252e-05 deg
tp 2458476.991953097845
(2018-Dec-24.49195310)
4.33e-05 TDB
period 1281.849110883596
3.51
5.3107e-06
1.454e-08
d
yr
n .2808442873216545 1.1635e-09 deg/d
Q 2.64727278194865 7.3118e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1566  
   data-arc span      11910 days (32.61 yr)  
   first obs. used      1987-04-28  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52331  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:26:12  

Additional Information
 Earth MOID = .962694 au 
 Jupiter MOID = 2.33767 au 
 T_jup = 3.569 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO492894  
diameter diameter 4.403 km 0.999 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.094   0.049 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

12722 Petrarca           Discovered 1991 Aug. 10 by E. W. Elst at the European Southern Observatory.
Francesco Petrarca (1304-1374) was an Italian poet famous for his Sonnets (1327-1374), which were dedicated to his muse, Laura. He was born in Arezzo and died in the Euganean Hills. Petrarca may be regarded as one of the greatest scholars of his age. His critical spirit made him the founder of Renaissance humanism.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 1991 PT1 = 1987 HB2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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