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JPL Small-Body Database Browser
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136818 Selqet (1997 MW1)
Classification: Aten [NEO]          SPK-ID: 2136818
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3463393395489076 5.9086e-08  
a .9375333404452426 9.983e-10 au
q .6128286625103562 5.5154e-08 au
i 12.77912903583438 6.6377e-06 deg
node 259.9399528293332 1.1509e-05 deg
peri 203.7993375184618 1.7176e-05 deg
M 183.5122491134221 2.0393e-05 deg
tp 2458763.051348323230
(2019-Oct-06.55134832)
1.8889e-05 TDB
period 331.5725034876236
0.91
5.2959e-07
1.45e-09
d
yr
n 1.085735385815662 1.7342e-09 deg/d
Q 1.262238018380129 1.344e-09 au
  Orbit Determination Parameters
   # obs. used (total)      631  
   data-arc span      7720 days (21.14 yr)  
   first obs. used      1997-06-29  
   last obs. used      2018-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41238  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Aug-19 06:58:12  

Additional Information
 Earth MOID = .113089 au 
 Jupiter MOID = 3.89319 au 
 T_jup = 6.327 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456229.5 (2012-Oct-29.0) TDB
Reference: JPL 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3464564401789679 5.8985e-08  
q .6128373055632721 5.5164e-08 au
tp 2456110.027259124796
(2012-Jul-01.52725912)
1.7763e-05 TDB
node 260.0139355762528 1.1499e-05 deg
peri 203.7547471618556 1.7178e-05 deg
i 12.77132293326417 6.6427e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      631  
   data-arc span      7720 days (21.14 yr)  
   first obs. used      1997-06-29  
   last obs. used      2018-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41238  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Aug-19 06:58:12  

Additional Information
 Jupiter MOID = 3.89319 au 
 T_jup = 6.327 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.479213955141039E-15 -3.253654637579817E-15 6.171527032344969E-13 -1.12980053053345E-13 3.870370346823104E-13 1.36896195240544E-13
q -3.253654637579817E-15 3.043060546473264E-15 -5.7882586251703E-13 1.054818760134607E-13 -3.629542409133235E-13 -1.280178082636987E-13
tp 6.171527032344969E-13 -5.7882586251703E-13 3.155088600255065E-10 -3.584646868466939E-11 2.271814247225299E-10 2.386993358035859E-11
node -1.12980053053345E-13 1.054818760134607E-13 -3.584646868466939E-11 1.322203568174188E-10 -1.502637886776948E-10 7.487984404451616E-12
peri 3.870370346823104E-13 -3.629542409133235E-13 2.271814247225299E-10 -1.502637886776948E-10 2.950698503712722E-10 7.480889113645841E-13
i 1.36896195240544E-13 -1.280178082636987E-13 2.386993358035859E-11 7.487984404451616E-12 7.480889113645841E-13 4.412606777652258E-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 18.9   n/a MPO385595  

136818 Selqet           Discovered 1997 June 29 by R. Tucker at the Goodricke-Pigott Observatory.
Selqet was the ancient Egyptian goddess of magic and protector of the other gods from the destroyer, Apep. She was one of the four guardians of the deceased. Her aid was beseeched by those afflicted by scorpion or other stings. The scorpion was her sacred creature.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070730/MPCPages.arcLast Updated: 2007-08-07

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