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17920 Zarnecki (1999 GE9)
Classification: Main-belt Asteroid          SPK-ID: 2017920
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09266813041529744 3.3797e-08  
a 2.360755959589204 7.7499e-09 au
q 2.141989118447301 7.8743e-08 au
i 6.395248260940996 4.0721e-06 deg
node 184.7160020721745 3.0934e-05 deg
peri 59.82023027855228 3.7424e-05 deg
M 17.03468051163346 2.0646e-05 deg
tp 2459333.808803184501
(2021-Apr-29.30880318)
7.5991e-05 TDB
period 1324.875499611906
3.63
6.524e-06
1.786e-08
d
yr
n .2717236450560482 1.338e-09 deg/d
Q 2.579522800731107 8.4681e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1425  
   data-arc span      22190 days (60.75 yr)  
   first obs. used      1960-09-24  
   last obs. used      2021-06-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53036  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:31:26  

Additional Information
 Earth MOID = 1.13813 au 
 Jupiter MOID = 2.42557 au 
 T_jup = 3.537 
[ 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 15.08   n/a E2021B10  
diameter diameter 2.179 km 0.454 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.282   0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17920 Zarnecki           Discovered 1999 Apr. 10 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
John C. Zarnecki (b. 1949), of the Open University, Milton Keynes, has developed spacecraft instrumentation to study the surfaces and atmospheres of planets, satellites and small bodies. He is a PI for the Huygens probe/lander on the Cassini mission to Saturn and Saturn VI (Titan).
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050721/MPCPages.arcLast Updated: 2005-07-21

Alternate Designations
 1999 GE9 = 1977 ED8 = 6249 P-L 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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