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17698 Racheldavis (1997 EW42)
Classification: Main-belt Asteroid          SPK-ID: 2017698
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05540923246430897 3.4003e-08  
a 3.114502438548409 1.8345e-08 au
q 2.941930248920223 1.1315e-07 au
i 11.20254053910535 3.6397e-06 deg
node 160.5239794188158 2.0418e-05 deg
peri 172.7334963500639 4.5055e-05 deg
M 261.1808690226862 4.1839e-05 deg
tp 2459551.586750117768
(2021-Dec-03.08675012)
0.00023511 TDB
period 2007.619659071296
5.50
1.7737e-05
4.856e-08
d
yr
n .1793168334317528 1.5843e-09 deg/d
Q 3.287074628176594 1.9361e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1726  
   data-arc span      8545 days (23.39 yr)  
   first obs. used      1997-03-10  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48677  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:14:55  

Additional Information
 Earth MOID = 1.93236 au 
 Jupiter MOID = 2.00145 au 
 T_jup = 3.186 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457149.5 (2015-May-07.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05430387561748949 3.3948e-08  
q 2.946380427512471 1.1282e-07 au
tp 2457548.993013428321
(2016-Jun-09.49301343)
0.00023411 TDB
node 160.5442652117647 2.0421e-05 deg
peri 173.783615034875 4.5828e-05 deg
i 11.20040346613843 3.6391e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1726  
   data-arc span      8545 days (23.39 yr)  
   first obs. used      1997-03-10  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48677  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:14:55  

Additional Information
 Jupiter MOID = 2.00145 au 
 T_jup = 3.186 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.152472981842052E-15 -3.789600373107609E-15 -6.645860994062499E-13 2.154895901845348E-15 -9.084904272248308E-14 3.82394191725671E-16
q -3.789600373107609E-15 1.272882697254752E-14 3.302865739717998E-12 -6.761350935999931E-15 4.841540796139157E-13 1.275204269816888E-16
tp -6.645860994062499E-13 3.302865739717998E-12 5.480859893391612E-8 -4.724201109201203E-11 9.627170638648271E-9 9.520369157795938E-12
node 2.154895901845348E-15 -6.761350935999931E-15 -4.724201109201203E-11 4.170208562130007E-10 -4.170777043540913E-10 5.765908256380747E-12
peri -9.084904272248308E-14 4.841540796139157E-13 9.627170638648271E-9 -4.170777043540913E-10 2.100223838272297E-9 -3.981867157288527E-12
i 3.82394191725671E-16 1.275204269816888E-16 9.520369157795938E-12 5.765908256380747E-12 -3.981867157288527E-12 1.324286349018822E-11

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 13.3   n/a MPO474001  
diameter diameter 11.716 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.062   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17698 Racheldavis           Discovered 1997 Mar. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Rachel Michelle Davis (b. 1993) is a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors, for her materials science project. She attends the Smithtown High School East, St. James, 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: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1997 EW42 = 1998 HU124 = 1999 RZ46 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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