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18696 (1998 HB34)
Classification: Main-belt Asteroid          SPK-ID: 2018696
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1089138749799924 4.7123e-08  
a 2.997128742631733 1.9884e-08 au
q 2.670699837457799 1.3609e-07 au
i 10.71665468737838 5.079e-06 deg
node 201.2843157398968 2.2667e-05 deg
peri 192.2895005991381 2.981e-05 deg
M 299.4767176743433 2.1556e-05 deg
tp 2459519.122541053139
(2021-Oct-31.62254105)
0.00011501 TDB
period 1895.206445710315
5.19
1.886e-05
5.164e-08
d
yr
n .1899529208624413 1.8903e-09 deg/d
Q 3.323557647805667 2.205e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1252  
   data-arc span      11024 days (30.18 yr)  
   first obs. used      1990-10-15  
   last obs. used      2020-12-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55561  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:25  

Additional Information
 Earth MOID = 1.67623 au 
 Jupiter MOID = 2.11855 au 
 T_jup = 3.219 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456713.5 (2014-Feb-25.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1131130389024764 4.7348e-08  
q 2.653861275249312 1.3792e-07 au
tp 2457627.637848631350
(2016-Aug-27.13784863)
0.00010347 TDB
node 201.5629594039724 2.2621e-05 deg
peri 192.5363304266745 2.9288e-05 deg
i 10.73366816722121 5.0889e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1252  
   data-arc span      11024 days (30.18 yr)  
   first obs. used      1990-10-15  
   last obs. used      2020-12-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55561  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:35:25  

Additional Information
 Jupiter MOID = 2.11855 au 
 T_jup = 3.219 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.241824336579658E-15 -6.48766401726499E-15 5.112840307007089E-13 -5.397488964051652E-15 1.033473656424229E-13 -3.914956513992928E-16
q -6.48766401726499E-15 1.902195258710972E-14 -9.453744277151733E-13 1.472935489864826E-14 -2.257155766574307E-13 1.695021501479436E-15
tp 5.112840307007089E-13 -9.453744277151733E-13 1.070668173551809E-8 3.892171029527934E-12 1.938701224214091E-9 5.695410895433659E-12
node -5.397488964051652E-15 1.472935489864826E-14 3.892171029527934E-12 5.117315057460881E-10 -5.017584163674678E-10 1.794196570647686E-11
peri 1.033473656424229E-13 -2.257155766574307E-13 1.938701224214091E-9 -5.017584163674678E-10 8.577684536929565E-10 -1.663402867688891E-11
i -3.914956513992928E-16 1.695021501479436E-15 5.695410895433659E-12 1.794196570647686E-11 -1.663402867688891E-11 2.589737554133582E-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 13.69   n/a E2021B10  
diameter diameter 6.270 km 0.281 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.179   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18696 (1998 HB34)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 HB34 = 1995 UR5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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