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JPL Small-Body Database Browser
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11020 Orwell (1984 OG)
Classification: Main-belt Asteroid          SPK-ID: 2011020
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1494267812172234 3.1538e-08  
a 3.100331281060413 1.635e-08 au
q 2.637058757024485 9.7111e-08 au
i 3.012942745955895 4.1727e-06 deg
node 153.8491715032742 7.2547e-05 deg
peri 136.9806701720543 7.4039e-05 deg
M 156.3623249275713 1.5351e-05 deg
tp 2457734.455518611929
(2016-Dec-11.95551861)
8.4697e-05 TDB
period 1993.933087424502
5.46
1.5773e-05
4.318e-08
d
yr
n .1805476835057691 1.4282e-09 deg/d
Q 3.563603805096342 1.8793e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2145  
   data-arc span      14681 days (40.19 yr)  
   first obs. used      1979-09-24  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49418  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 23:11:03  

Additional Information
 Earth MOID = 1.6212 au 
 Jupiter MOID = 1.62353 au 
 T_jup = 3.203 
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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 12.6   n/a MPO337351  
diameter diameter 14.466 km 0.115 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.089   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11020 Orwell           Discovered 1984 July 31 by A. Mrkos at Klet.
British writer George Orwell (Eric Blair, 1903-1950) was renowned for his novels Animal Farm and 1984, the latter a brilliant examination of the dangers of totalitarian rule. The name was suggested by J. Ticha and endorsed by B. G. Marsden, who made the identification involving this aptly designated object.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1984 OG = 1979 SA9 = 1999 GL5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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