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29660 Jessmacalpine (1998 WE20)
Classification: Main-belt Asteroid          SPK-ID: 2029660
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1480717796531068 3.3169e-08  
a 2.292142407686891 7.9359e-09 au
q 1.952740802162336 7.578e-08 au
i 3.519007733890395 4.0794e-06 deg
node 21.4346353709563 6.1744e-05 deg
peri 70.39816405487184 6.3484e-05 deg
M 101.260178232301 1.5456e-05 deg
tp 2458843.969237516678
(2019-Dec-26.46923752)
5.364e-05 TDB
period 1267.537513113452
3.47
6.5827e-06
1.802e-08
d
yr
n .2840152628822259 1.475e-09 deg/d
Q 2.631544013211446 9.111e-09 au
  Orbit Determination Parameters
   # obs. used (total)      854  
   data-arc span      15829 days (43.34 yr)  
   first obs. used      1977-10-11  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52078  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:21:50  

Additional Information
 Earth MOID = .972386 au 
 Jupiter MOID = 2.54434 au 
 T_jup = 3.580 
[ show covariance matrix ]

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 16.01   n/a E2021B10  
diameter diameter 1.965 km 0.442 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.240   0.091 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

29660 Jessmacalpine           Discovered 1998 Nov. 18 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Jessie Leanne Preston MacAlpine (b. 1995) was awarded best of category and first place in the 2013 Intel International Science and Engineering Fair for her medicine and health sciences project. She attends the Huron Park Secondary School, Woodstock, Ontario, Canada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-06-13Last Updated: 2015-02-04

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Alternate Designations
 1998 WE20 = 1982 BP6 = 3249 T-3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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