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JPL Small-Body Database Browser
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9965 GNU (1992 EF2)
Classification: Main-belt Asteroid          SPK-ID: 2009965
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699055702610316 3.6093e-08  
a 2.418901679306862 8.532e-09 au
q 2.007916810078863 8.5058e-08 au
i 12.20527948196141 3.6887e-06 deg
node 156.4601778620219 1.8796e-05 deg
peri 82.87345665466189 2.1957e-05 deg
M 21.29115029848492 1.0905e-05 deg
tp 2458519.231475305936
4.1563e-05 TDB
period 1374.123449400701
n .2619851951125698 1.3861e-09 deg/d
Q 2.829886548534861 9.9816e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1597  
   data-arc span      11608 days (31.78 yr)  
   first obs. used      1988-01-20  
   last obs. used      2019-11-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49402  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:20:48  

Additional Information
 Earth MOID = 1.04021 au 
 Jupiter MOID = 2.27094 au 
 T_jup = 3.465 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO435794  
diameter diameter 6.293 km 0.159 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 39.745 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.102   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

9965 GNU           Discovered 1992 Mar. 5 by Spacewatch at Kitt Peak.
GNU is the recursive acronym for "GNU is not Unix". The GNU project was created by Richard Stallman's Free Software Foundation in 1984. It enabled computer programmers to trade and improve on each others' ideas freely. Linux and academic computing owe much of their functionality to the firm foundations of GNU software.
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

Alternate Designations
 1992 EF2 = 1988 BD4 = 1993 QR3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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