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20330 Manwell (1998 HY44)
Classification: Main-belt Asteroid          SPK-ID: 2020330
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 .07496027290012616 4.3637e-08  
a 2.705354973619152 1.4283e-08 au
q 2.502560826504947 1.1756e-07 au
i .4807622070878681 3.7635e-06 deg
node 262.3795869664893 0.00063233 deg
peri 41.94639007622352 0.00063314 deg
M 170.7978753040263 3.2556e-05 deg
tp 2457829.392767871784
(2017-Mar-16.89276787)
0.00014748 TDB
period 1625.304782463029
4.45
1.2871e-05
3.524e-08
d
yr
n .2214969179223399 1.7541e-09 deg/d
Q 2.908149120733357 1.5354e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1193  
   data-arc span      15096 days (41.33 yr)  
   first obs. used      1977-09-09  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56236  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:39:50  

Additional Information
 Earth MOID = 1.48657 au 
 Jupiter MOID = 2.24598 au 
 T_jup = 3.361 
[ 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 14.8   n/a MPO431733  
diameter diameter 4.670 km 0.453 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20330 Manwell           Discovered 1998 Apr. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Anne Manwell mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. She teaches at the Stuyvesant High School, New York, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040415/MPCPages.arcLast Updated: 2004-04-20

Alternate Designations
 1998 HY44 = 1977 RG16 = 1994 LM8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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