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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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1096702514505471 4.934e-08  
a 2.998570088185357 1.983e-08 au
q 2.66971615262198 1.4226e-07 au
i 10.71314425123523 5.2444e-06 deg
node 201.4037585684655 2.3033e-05 deg
peri 191.989610385118 3.0173e-05 deg
M 261.7663652515882 2.155e-05 deg
tp 2459518.020367406928
(2021-Oct-30.52036741)		 0.00011602 TDB
period 1896.57374221823
5.19		 1.8813e-05
5.151e-08		 d
yr
n .1898159781432725 1.8829e-09 deg/d
Q 3.327424023748734 2.2004e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1171  
   data-arc span      10534 days (28.84 yr)  
   first obs. used      1990-10-15  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57148  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:26:33  

Additional Information
 Earth MOID = 1.67634 au 
 Jupiter MOID = 2.11366 au 
 T_jup = 3.218 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456602.5 (2013-Nov-06.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1132836913972351 4.9506e-08  
q 2.652938929773878 1.4316e-07 au
tp 2455737.160139016576
(2011-Jun-24.66013902)		 9.9698e-05 TDB
node 201.5638992160228 2.2979e-05 deg
peri 192.5292634140153 2.9698e-05 deg
i 10.73473513635323 5.2548e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      1171  
   data-arc span      10534 days (28.84 yr)  
   first obs. used      1990-10-15  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57148  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 01:26:33  

Additional Information
 Jupiter MOID = 2.11366 au 
 T_jup = 3.218 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.450863420814523E-15 -7.042305948651815E-15 3.154975394047897E-13 -4.965095514523205E-15 1.104193192493846E-13 -7.280184574587413E-16
q -7.042305948651815E-15 2.049425706936741E-14 -6.513563908000373E-13 1.328835465881423E-14 -2.480274926331882E-13 2.651179066312596E-15
tp 3.154975394047897E-13 -6.513563908000373E-13 9.939613964048543E-9 4.982421545578059E-12 1.888156068686737E-9 4.391719551979171E-12
node -4.965095514523205E-15 1.328835465881423E-14 4.982421545578059E-12 5.280531318600929E-10 -5.178495012388765E-10 1.756834133611077E-11
peri 1.104193192493846E-13 -2.480274926331882E-13 1.888156068686737E-9 -5.178495012388765E-10 8.819746550518729E-10 -1.641480254951327E-11
i -7.280184574587413E-16 2.651179066312596E-15 4.391719551979171E-12 1.756834133611077E-11 -1.641480254951327E-11 2.761289061061478E-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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