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173128 (1994 HL1)
Classification: Main-belt Asteroid          SPK-ID: 2173128
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .197965409627416 7.2807e-08  
a 2.360165035921534 1.7528e-08 au
q 1.892933997797023 1.7804e-07 au
i 1.758023058291011 8.516e-06 deg
node 188.3642824083709 0.00020264 deg
peri 62.02406122846878 0.00020476 deg
M 292.9606946849621 3.808e-05 deg
tp 2458847.126074232663
(2019-Dec-29.62607423)
0.00014235 TDB
period 1324.378083969238
3.63
1.4754e-05
4.039e-08
d
yr
n .271825700196623 3.0281e-09 deg/d
Q 2.827396074046046 2.0998e-08 au
  Orbit Determination Parameters
   # obs. used (total)      214  
   data-arc span      9079 days (24.86 yr)  
   first obs. used      1994-04-19  
   last obs. used      2019-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5933  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:02:02  

Additional Information
 Earth MOID = .87939 au 
 Jupiter MOID = 2.21022 au 
 T_jup = 3.524 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456465.5 (2013-Jun-22.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1989217150727949 7.2669e-08  
q 1.890404267657565 1.7779e-07 au
tp 2456197.499552581827
(2012-Sep-26.99955258)
0.00011816 TDB
node 188.4579758002887 0.00020295 deg
peri 61.85488902646941 0.00020504 deg
i 1.756296360121345 8.5134e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      214  
   data-arc span      9079 days (24.86 yr)  
   first obs. used      1994-04-19  
   last obs. used      2019-02-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5933  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:02:02  

Additional Information
 Jupiter MOID = 2.21022 au 
 T_jup = 3.524 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.280794979019475E-15 -1.288640725727062E-14 -4.909274299819766E-12 -1.857514919658032E-14 -1.134925022461187E-12 -3.490184198953452E-15
q -1.288640725727062E-14 3.160838983177133E-14 1.281236904197876E-11 5.497191875116979E-14 2.97514254516302E-12 8.909872269827513E-15
tp -4.909274299819766E-12 1.281236904197876E-11 1.396076531453864E-8 8.504060464329376E-11 3.473949349194574E-9 8.375823841439126E-12
node -1.857514919658032E-14 5.497191875116979E-14 8.504060464329376E-11 4.118928917328786E-8 -4.114661252610186E-8 7.700791266541333E-11
peri -1.134925022461187E-12 2.97514254516302E-12 3.473949349194574E-9 -4.114661252610186E-8 4.204040295597398E-8 -7.487670806172505E-11
i -3.490184198953452E-15 8.909872269827513E-15 8.375823841439126E-12 7.700791266541333E-11 -7.487670806172505E-11 7.247807979055179E-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 17.3   n/a MPO469855  

173128 (1994 HL1)          Discovered 1994-Apr-19 by Spacewatch at Kitt Peak
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 1994 HL1 = 2005 JP44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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