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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .109670270122399 4.7287e-08  
a 2.99857009882319 1.9072e-08 au
q 2.669716106104302 1.3726e-07 au
i 10.71314427981735 5.0964e-06 deg
node 201.4037660274378 2.3022e-05 deg
peri 191.9896251817033 3.0154e-05 deg
M 261.7663441824247 2.143e-05 deg
tp 2459518.020481158729
(2021-Oct-30.52048116)		 0.00011524 TDB
period 1896.573752310757
5.19		 1.8094e-05
4.954e-08		 d
yr
n .1898159771331757 1.8109e-09 deg/d
Q 3.327424091542078 2.1163e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1236  
   data-arc span      10890 days (29.82 yr)  
   first obs. used      1990-10-15  
   last obs. used      2020-08-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55851  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:13:26  

Additional Information
 Earth MOID = 1.67634 au 
 Jupiter MOID = 2.11366 au 
 T_jup = 3.218 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456654.5 (2013-Dec-28.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1132094369127872 4.7461e-08  
q 2.653342214417462 1.3816e-07 au
tp 2455737.110760034739
(2011-Jun-24.61076003)		 9.9721e-05 TDB
node 201.5637157428664 2.297e-05 deg
peri 192.5370218385346 2.9688e-05 deg
i 10.73428289346804 5.1064e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1236  
   data-arc span      10890 days (29.82 yr)  
   first obs. used      1990-10-15  
   last obs. used      2020-08-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55851  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:13:26  

Additional Information
 Jupiter MOID = 2.11366 au 
 T_jup = 3.218 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.252507241270077E-15 -6.51409105961782E-15 2.700881556648524E-13 -4.112907738426786E-15 1.008520721890562E-13 -5.053120157548664E-16
q -6.51409105961782E-15 1.908798137344208E-14 -5.29941800965831E-13 1.105246981857941E-14 -2.224881475300671E-13 2.040550843413053E-15
tp 2.700881556648524E-13 -5.29941800965831E-13 9.944182488135239E-9 5.669839794870316E-12 1.888154435181298E-9 5.256526222276721E-12
node -4.112907738426786E-15 1.105246981857941E-14 5.669839794870316E-12 5.276164814119854E-10 -5.172843316911151E-10 1.678374310257381E-11
peri 1.008520721890562E-13 -2.224881475300671E-13 1.888154435181298E-9 -5.172843316911151E-10 8.813733648630176E-10 -1.547050627810188E-11
i -5.053120157548664E-16 2.040550843413053E-15 5.256526222276721E-12 1.678374310257381E-11 -1.547050627810188E-11 2.60752020876077E-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 13.7   n/a MPO395182  
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

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