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17938 Tamsendrew (1999 HW6)
Classification: Main-belt Asteroid          SPK-ID: 2017938
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1876408083121661 3.1525e-08  
a 2.35702164911161 6.9717e-09 au
q 1.914748201663033 7.4451e-08 au
i 3.788046535157578 3.5524e-06 deg
node 209.3736787798973 4.9803e-05 deg
peri 339.2050907181293 5.0561e-05 deg
M 64.54294533830888 9.0551e-06 deg
tp 2459159.531803430290
(2020-Nov-06.03180343)
3.2862e-05 TDB
period 1321.733154846612
3.62
5.8642e-06
1.606e-08
d
yr
n .2723696524369763 1.2084e-09 deg/d
Q 2.799295096560188 8.2798e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1664  
   data-arc span      16209 days (44.38 yr)  
   first obs. used      1977-02-11  
   last obs. used      2021-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50335  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:31:36  

Additional Information
 Earth MOID = .916718 au 
 Jupiter MOID = 2.1602 au 
 T_jup = 3.527 
[ 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 14.61   n/a E2021B10  
diameter diameter 3.224 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.642 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012) http://www.asu.cas.cz/~ppravec/neo.htm]
[Fauerbach, M. (2019) Minor Planet Bull. 46, 15-19.]
geometric albedo albedo 0.204   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17938 Tamsendrew           Discovered 1999 Apr. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Tamsen Alicia Drew (b. 1985) was awarded fourth place in the 2003 Intel International Science and Engineering Fair for her engineering team project. She also received the Intel Foundation Achievement Award. She attends the Amador Valley High School, Pleasanton, California, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040614/MPCPages.arcLast Updated: 2009-12-11

Alternate Designations
 1999 HW6 = 1977 CL1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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