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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 ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05540923211044704 3.3985e-08  
a 3.11450243814895 1.8337e-08 au
q 2.941930249645002 1.1311e-07 au
i 11.20254054759862 3.6349e-06 deg
node 160.5239783691503 2.0401e-05 deg
peri 172.7334982390591 4.5029e-05 deg
M 261.1808683227331 4.1821e-05 deg
tp 2459551.586753915190
(2021-Dec-03.08675392)		 0.00023501 TDB
period 2007.619658685058
5.50		 1.7731e-05
4.854e-08		 d
yr
n .1793168334662509 1.5837e-09 deg/d
Q 3.287074626652899 1.9353e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1744  
   data-arc span      8559 days (23.43 yr)  
   first obs. used      1997-03-10  
   last obs. used      2020-08-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48847  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:19:28  

Additional Information
 Earth MOID = 1.93236 au 
 Jupiter MOID = 2.00145 au 
 T_jup = 3.186 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457155.5 (2015-May-13.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05430637708938555 3.393e-08  
q 2.946397891439036 1.1278e-07 au
tp 2457548.950564697563
(2016-Jun-09.45056470)		 0.000234 TDB
node 160.5441684066528 2.0403e-05 deg
peri 173.7752233072526 4.58e-05 deg
i 11.20040565930401 3.6342e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1744  
   data-arc span      8559 days (23.43 yr)  
   first obs. used      1997-03-10  
   last obs. used      2020-08-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48847  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:19:28  

Additional Information
 Jupiter MOID = 2.00145 au 
 T_jup = 3.186 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.1512618886354E-15 -3.78628112838855E-15 -6.691923604104095E-13 2.129487925013985E-15 -9.155172606432585E-14 3.789618760164897E-16
q -3.78628112838855E-15 1.27196676285925E-14 3.317500844567638E-12 -6.685397674195496E-15 4.86458434674341E-13 1.353883750635293E-16
tp -6.691923604104095E-13 3.317500844567638E-12 5.475494314841693E-8 -4.70604961240884E-11 9.617049026897733E-9 9.524017878236916E-12
node 2.129487925013985E-15 -6.685397674195496E-15 -4.70604961240884E-11 4.162895461906301E-10 -4.163276125809507E-10 5.780294909242989E-12
peri -9.155172606432585E-14 4.86458434674341E-13 9.617049026897733E-9 -4.163276125809507E-10 2.097599634876562E-9 -3.995257460393944E-12
i 3.789618760164897E-16 1.353883750635293E-16 9.524017878236916E-12 5.780294909242989E-12 -3.995257460393944E-12 1.3207671977068E-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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1939-Nov-05 12:16 00:02 Jupiter 1.98710152765307 1.98710118826797 1.98710186703817 4.79237702184884 4.7025904453713 2429573.010956530 1.88361207784203 145.576078604914 15.6647507376667 89.6199075845161 4745959.30303735 T 30 CATAB v2.0f-lin.ifort 2020-Nov-13 02:19:33 2020-Nov-13 02:19

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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