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9882 Stallman (1994 SS9)
Classification: Main-belt Asteroid          SPK-ID: 2009882
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 .182650831812524 3.4416e-08  
a 2.392862965288649 7.2334e-09 au
q 1.955804554265294 8.2262e-08 au
i .9918632892950504 4.6988e-06 deg
node 148.7597113758724 0.00020463 deg
peri 156.9492687386461 0.00020496 deg
M 21.60731072096926 1.1394e-05 deg
tp 2458919.352828672422
(2020-Mar-10.85282867)
4.2729e-05 TDB
period 1351.995260084719
3.70
6.1305e-06
1.678e-08
d
yr
n .2662731228639379 1.2074e-09 deg/d
Q 2.829921376312003 8.5546e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1037  
   data-arc span      15035 days (41.16 yr)  
   first obs. used      1979-08-26  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53582  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:10:26  

Additional Information
 Earth MOID = .940819 au 
 Jupiter MOID = 2.41047 au 
 T_jup = 3.508 
[ 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 15.9   n/a MPO467770  
diameter diameter 4.234 km 0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.039   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9882 Stallman           Discovered 1994 Sept. 28 by Spacewatch at Kitt Peak.
Richard Stallman (b. 1953) is the founder of the GNU project and an advocate and developer of free software. He created the GNU system of tools, which made possible the GNU/Linux operating system. This operating system is used by several minor-planet surveys for data collection and analysis.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1994 SS9 = 1979 QV4 = 1997 HE18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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