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14693 Selwyn (2000 AH144)
Classification: Main-belt Asteroid          SPK-ID: 2014693
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1944603390220769 2.6839e-08  
a 2.351843245114485 7.8191e-09 au
q 1.894503010342741 6.2054e-08 au
i 1.818171226450394 3.4205e-06 deg
node 197.2532588151699 0.00010165 deg
peri 43.43785851365921 0.00010209 deg
M 271.9221829800472 1.0515e-05 deg
tp 2459718.810924643847
(2022-May-19.31092464)
3.9075e-05 TDB
period 1317.379753468451
3.61
6.5698e-06
1.799e-08
d
yr
n .2732697227600297 1.3628e-09 deg/d
Q 2.809183479886229 9.3396e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1730  
   data-arc span      16745 days (45.85 yr)  
   first obs. used      1975-04-15  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52257  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 00:36:43  

Additional Information
 Earth MOID = .882846 au 
 Jupiter MOID = 2.20062 au 
 T_jup = 3.531 
[ 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 14.66   n/a MPCxxxxx  
diameter diameter 4.312 km 2.417 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.151   0.165 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

14693 Selwyn           Discovered 2000 Jan. 5 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Named in honor of Marilyn Selwyn for mentoring a finalist in the 2001 Discovery Young Scientist Challenge (DYSC), a middle school science competition. Selwyn is a teacher at the Tanque Verde Elementary School, Tucson, Arizona.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20011002/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 2000 AH144 = 1975 GV = 1998 XG10 = 2000 CF53 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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