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5644 Maureenbell (1990 QG2)
Classification: Main-belt Asteroid          SPK-ID: 2005644
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1115813099337598 3.2507e-08  
a 3.125218438775442 1.5801e-08 au
q 2.776502471547739 1.008e-07 au
i 14.33059276722071 3.9063e-06 deg
node 165.9838540598869 1.4762e-05 deg
peri 263.1584954869187 2.3759e-05 deg
M 64.80751274028108 1.7627e-05 deg
tp 2458637.219700468547
(2019-Jun-02.71970047)
9.9028e-05 TDB
period 2017.989925881485
5.52
1.5304e-05
4.19e-08
d
yr
n .1783953405231927 1.3529e-09 deg/d
Q 3.473934406003146 1.7564e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2448  
   data-arc span      25101 days (68.72 yr)  
   first obs. used      1951-08-08  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46147  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:24:04  

Additional Information
 Earth MOID = 1.83598 au 
 Jupiter MOID = 1.90183 au 
 T_jup = 3.157 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456881.5 (2014-Aug-12.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1106628761192198 3.2535e-08  
q 2.782601450754856 1.0119e-07 au
tp 2456627.176054301033
(2013-Nov-30.67605430)
0.00010247 TDB
node 166.0213351382284 1.4779e-05 deg
peri 264.6292979754251 2.3855e-05 deg
i 14.31579881267364 3.9032e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2448  
   data-arc span      25101 days (68.72 yr)  
   first obs. used      1951-08-08  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46147  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:24:04  

Additional Information
 Jupiter MOID = 1.90183 au 
 T_jup = 3.157 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.058548229829088E-15 -3.259616556601501E-15 -2.377950080734612E-13 -3.144481702998699E-15 -5.95078941587877E-14 -7.647398474153103E-16
q -3.259616556601501E-15 1.023908716629083E-14 3.142239524952036E-13 7.696718889962566E-15 1.129791238096243E-13 2.098109992191335E-15
tp -2.377950080734612E-13 3.142239524952036E-13 1.04992191624602E-8 -1.703743356507505E-11 1.935279444540961E-9 -4.253029580222982E-12
node -3.144481702998699E-15 7.696718889962566E-15 -1.703743356507505E-11 2.184068892047713E-10 -2.144823990867996E-10 1.132287546275492E-12
peri -5.95078941587877E-14 1.129791238096243E-13 1.935279444540961E-9 -2.144823990867996E-10 5.690405694944143E-10 -1.879236646409114E-12
i -7.647398474153103E-16 2.098109992191335E-15 -4.253029580222982E-12 1.132287546275492E-12 -1.879236646409114E-12 1.523499061204747E-11

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 12.1   n/a MPO337301  
diameter diameter 15.926 km 0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.090   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

5644 Maureenbell           Discovered 1990 Aug. 22 by H. E. Holt at Palomar.
Maureen E. Ockert-Bell (b. 1961), an image-processing specialist at Cornell University, has published results on the physical and optical properties of the Saturnian, Uranian and Jovian ring systems, on the physical and radiative properties of dust in Mars' atmosphere, and on clouds in Earth's atmosphere.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990928/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1990 QG2 = 1979 SZ12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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