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100870 (1998 HM78)
Classification: Main-belt Asteroid          SPK-ID: 2100870
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1499187884271122 3.6432e-08  
a 2.345295729797726 9.2259e-09 au
q 1.993691835483171 8.4556e-08 au
i 2.074299440857531 4.1653e-06 deg
node 353.4497851449541 0.00010351 deg
peri 187.6203711372925 0.00010429 deg
M 133.9215311130932 1.3843e-05 deg
tp 2458712.474234599405
(2019-Aug-16.97423460)
4.9287e-05 TDB
period 1311.88222001322
3.59
7.741e-06
2.119e-08
d
yr
n .2744148784914338 1.6192e-09 deg/d
Q 2.696899624112281 1.0609e-08 au
  Orbit Determination Parameters
   # obs. used (total)      800  
   data-arc span      8105 days (22.19 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54496  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:08  

Additional Information
 Earth MOID = .996138 au 
 Jupiter MOID = 2.26255 au 
 T_jup = 3.545 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457037.5 (2015-Jan-15.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .14975583990793 3.6331e-08  
q 1.993186404090444 8.4172e-08 au
tp 2457400.268169712529
(2016-Jan-12.76816971)
4.6903e-05 TDB
node 353.5238974965484 0.00010358 deg
peri 187.4296815314953 0.00010437 deg
i 2.07445869276522 4.1632e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      800  
   data-arc span      8105 days (22.19 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-06-29  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54496  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:08  

Additional Information
 Jupiter MOID = 2.26255 au 
 T_jup = 3.545 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.31993122305458E-15 -3.045474100848081E-15 2.224443393611138E-13 -4.547703999609337E-16 6.92240583130971E-14 -2.921653804876595E-17
q -3.045474100848081E-15 7.084897492183503E-15 -4.304792399011439E-13 3.397940467890409E-16 -1.41275959501084E-13 1.094703489417126E-16
tp 2.224443393611138E-13 -4.304792399011439E-13 2.199899325520236E-9 5.933131314031162E-12 6.122545858771105E-10 4.131449782376043E-13
node -4.547703999609337E-16 3.397940467890409E-16 5.933131314031162E-12 1.072879194307338E-8 -1.071982702834143E-8 4.854765756849291E-11
peri 6.92240583130971E-14 -1.41275959501084E-13 6.122545858771105E-10 -1.071982702834143E-8 1.089321311407957E-8 -4.839411746647497E-11
i -2.921653804876595E-17 1.094703489417126E-16 4.131449782376043E-13 4.854765756849291E-11 -4.839411746647497E-11 1.733213499177076E-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 16.13   n/a E2021B55  

100870 (1998 HM78)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 HM78 = 2003 UH311 = 2003 UL199 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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