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100837 (1998 HG15)
Classification: Main-belt Asteroid          SPK-ID: 2100837
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2193991217134123 3.352e-08  
a 2.206845521990223 6.6438e-09 au
q 1.722665552708391 7.4709e-08 au
i 5.988461226865819 3.313e-06 deg
node 77.69171849335261 3.8671e-05 deg
peri 259.6413616435545 3.967e-05 deg
M 237.7800062027129 8.169e-06 deg
tp 2459607.033261477507
(2022-Jan-27.53326148)
2.7913e-05 TDB
period 1197.447075432196
3.28
5.4074e-06
1.48e-08
d
yr
n .3006395918333717 1.3576e-09 deg/d
Q 2.691025491272055 8.1014e-09 au
  Orbit Determination Parameters
   # obs. used (total)      798  
   data-arc span      8331 days (22.81 yr)  
   first obs. used      1998-04-20  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57344  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:33:59  

Additional Information
 Earth MOID = .723996 au 
 Jupiter MOID = 2.70862 au 
 T_jup = 3.622 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457010.5 (2014-Dec-19.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2200737856479348 3.3591e-08  
q 1.721135603579146 7.4946e-08 au
tp 2457211.223393459680
(2015-Jul-07.72339346)
2.4961e-05 TDB
node 77.7488280731863 3.8699e-05 deg
peri 259.5056584236677 3.9683e-05 deg
i 5.987154308755494 3.3118e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      798  
   data-arc span      8331 days (22.81 yr)  
   first obs. used      1998-04-20  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57344  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:33:59  

Additional Information
 Jupiter MOID = 2.70862 au 
 T_jup = 3.622 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.128356237046872E-15 -2.511589348093262E-15 1.012077425746618E-13 4.319296703263949E-15 1.393950680657334E-14 -2.544953602674383E-15
q -2.511589348093262E-15 5.616828008188358E-15 -2.166207301382736E-13 -1.102426943379462E-14 -2.851749158578852E-14 5.774506897980723E-15
tp 1.012077425746618E-13 -2.166207301382736E-13 6.230571225916279E-10 -1.592614762412466E-11 2.331377826167514E-10 -7.634662186445019E-13
node 4.319296703263949E-15 -1.102426943379462E-14 -1.592614762412466E-11 1.497624534643332E-9 -1.494572468314744E-9 -9.798113088951629E-12
peri 1.393950680657334E-14 -2.851749158578852E-14 2.331377826167514E-10 -1.494572468314744E-9 1.574764843345813E-9 9.532383381876059E-12
i -2.544953602674383E-15 5.774506897980723E-15 -7.634662186445019E-13 -9.798113088951629E-12 9.532383381876059E-12 1.096801939160111E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.20   n/a E2021B55  

100837 (1998 HG15)          Discovered 1998-Apr-20 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 HG15 = 2002 RA65 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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