Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1844526313817385 4.0885e-08  
a 2.617855390244807 1.1944e-08 au
q 2.134985074937284 1.0584e-07 au
i 10.78705321025599 4.5298e-06 deg
node 254.0393146514075 2.0271e-05 deg
peri 209.8291748081269 2.2556e-05 deg
M 279.3211070956201 1.1682e-05 deg
tp 2459347.216360356048
(2021-May-12.71636036)
5.1479e-05 TDB
period 1547.09472620194
4.24
1.0588e-05
2.899e-08
d
yr
n .2326942196253145 1.5926e-09 deg/d
Q 3.100725705552329 1.4148e-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 = 1.15871 au 
 Jupiter MOID = 2.11594 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-May-29 23:45 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin