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JPL Small-Body Database Browser
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108268 (2001 HZ55)
Classification: Main-belt Asteroid          SPK-ID: 2108268
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1798784259521995 3.7633e-08  
a 2.258460840827483 8.6978e-09 au
q 1.852212459704754 8.5801e-08 au
i 6.613374300119195 3.8092e-06 deg
node 134.9854223813972 4.2444e-05 deg
peri 146.6053181469998 4.4304e-05 deg
M 185.321125471038 1.2786e-05 deg
tp 2459602.027045135462
(2022-Jan-22.52704514)
4.4801e-05 TDB
period 1239.701920639877
3.39
7.1615e-06
1.961e-08
d
yr
n .2903923870781652 1.6775e-09 deg/d
Q 2.664709221950211 1.0262e-08 au
  Orbit Determination Parameters
   # obs. used (total)      573  
   data-arc span      7837 days (21.46 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58481  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:05:10  

Additional Information
 Earth MOID = .839958 au 
 Jupiter MOID = 2.49151 au 
 T_jup = 3.591 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457356.5 (2015-Nov-30.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1800919526323982 3.75e-08  
q 1.851489294797956 8.5508e-08 au
tp 2457123.431574408626
(2015-Apr-10.93157441)
4.3403e-05 TDB
node 135.0252753291803 4.2444e-05 deg
peri 146.6745698299981 4.4308e-05 deg
i 6.61361620873892 3.8092e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      573  
   data-arc span      7837 days (21.46 yr)  
   first obs. used      1998-08-17  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58481  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 03:05:10  

Additional Information
 Jupiter MOID = 2.49151 au 
 T_jup = 3.591 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.40628633343842E-15 -3.195481520706069E-15 -4.925323488861569E-13 -2.847108437121621E-15 -1.786499172075436E-13 -1.759886290632057E-15
q -3.195481520706069E-15 7.311646067757091E-15 1.09138210834731E-12 6.500933920930462E-15 3.992030485616512E-13 4.160326961585849E-15
tp -4.925323488861569E-13 1.09138210834731E-12 1.883815819982845E-9 1.898118766713018E-11 5.762399118276581E-10 2.167630703197008E-12
node -2.847108437121621E-15 6.500933920930462E-15 1.898118766713018E-11 1.801512982487541E-9 -1.783261088169786E-9 -1.318762462634005E-11
peri -1.786499172075436E-13 3.992030485616512E-13 5.762399118276581E-10 -1.783261088169786E-9 1.96321408645325E-9 1.378932174011314E-11
i -1.759886290632057E-15 4.160326961585849E-15 2.167630703197008E-12 -1.318762462634005E-11 1.378932174011314E-11 1.451006929122266E-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 16.4   n/a MPO449647  

108268 (2001 HZ55)          Discovered 2001-Apr-24 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2001 HZ55 = 1998 QY31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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