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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07539669023346172 3.9113e-08  
a 2.704334959315163 1.2158e-08 au
q 2.500437054100157 1.0845e-07 au
i .480780012772641 3.2319e-06 deg
node 262.3816342037958 0.00061962 deg
peri 42.13823622960469 0.00062041 deg
M 303.5624107952375 3.2303e-05 deg
tp 2459455.156698152732
(2021-Aug-28.65669815)
0.00014569 TDB
period 1624.385673214536
4.45
1.0954e-05
2.999e-08
d
yr
n .2216222452193802 1.4945e-09 deg/d
Q 2.90823286453017 1.3074e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1338  
   data-arc span      15600 days (42.71 yr)  
   first obs. used      1977-09-09  
   last obs. used      2020-05-26  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54378  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:19  

Additional Information
 Earth MOID = 1.48325 au 
 Jupiter MOID = 2.24664 au 
 T_jup = 3.362 
[ 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 14.87   n/a E2021B10  
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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