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JPL Small-Body Database Browser
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12222 Perotto (1982 WA)
Classification: Main-belt Asteroid          SPK-ID: 2012222
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1837396732761167 4.0791e-08  
a 2.619462761391379 1.2199e-08 au
q 2.138163529454372 1.055e-07 au
i 10.78746273803989 4.5298e-06 deg
node 254.0457383378174 2.0261e-05 deg
peri 209.7371930284435 2.2574e-05 deg
M 186.3394610461573 1.1411e-05 deg
tp 2459347.491076652465
(2021-May-12.99107665)
5.1699e-05 TDB
period 1548.519826178604
4.24
1.0817e-05
2.962e-08
d
yr
n .2324800715586563 1.6239e-09 deg/d
Q 3.100761993328385 1.444e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1243  
   data-arc span      13440 days (36.80 yr)  
   first obs. used      1982-11-19  
   last obs. used      2019-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46427  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:11:36  

Additional Information
 Earth MOID = 1.16195 au 
 Jupiter MOID = 2.11677 au 
 T_jup = 3.357 
[ 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 13.7   n/a MPO299051  
diameter diameter 8.744 km 2.175 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.048   0.041 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

12222 Perotto           Discovered 1982 Nov. 19 at Osservatorio San Vittore.
Pier Giorgio Perotto (1930-2002) was an Italian electronics engineer. An employee at Olivetti, in 1964 he invented the world's first desktop programmable electronic calculator, known variously as "Programma 101" and "Perottina".
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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