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22312 Kelly (1991 GW1)
Classification: Main-belt Asteroid          SPK-ID: 2022312
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1935747664877662 1.4833e-08  
a 2.271896004499233 8.2342e-09 au
q 1.832114265943805 3.4689e-08 au
i 24.56115203157421 8.8992e-07 deg
node 219.4067257835793 2.9561e-06 deg
peri 335.4526551808538 5.882e-06 deg
M 253.724046675221 5.6652e-06 deg
tp 2459569.744136156061
(2021-Dec-21.24413616)
2.128e-05 TDB
period 1250.78049038953
3.42
6.8e-06
1.862e-08
d
yr
n .2878202872255269 1.5648e-09 deg/d
Q 2.711677743054661 9.8282e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1905  
   data-arc span      12430 days (34.03 yr)  
   first obs. used      1987-02-27  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43578  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:04:16  

Additional Information
 Earth MOID = .841555 au 
 Jupiter MOID = 2.29852 au 
 T_jup = 3.470 
[ 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 14.28   n/a E2021B10  
diameter diameter 2.746 km 0.400 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.321   0.128 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

22312 Kelly           Discovered 1991 Apr. 14 by C. S. Shoemaker and D. H. Levy at Palomar.
Thomas J. Kelly (1929-2002) was the chief engineer of the Apollo Lunar Module. Considered the "Father of the LM", he and his Grumman Aerospace engineering team oversaw the design, construction and testing of each of the spacecraft that safely landed twelve men on the moon.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030806/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1991 GW1 = 1987 DC7 = 1991 JO = 1998 MF19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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