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100844 (1998 HH23)
Classification: Main-belt Asteroid          SPK-ID: 2100844
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 .04523545383114329 4.2227e-08  
a 3.118489645401607 2.092e-08 au
q 2.977423351024144 1.3196e-07 au
i 3.427718131548384 4.5529e-06 deg
node 150.5075818453466 6.7973e-05 deg
peri 52.15445881781451 8.1959e-05 deg
M 359.5701253213642 4.4355e-05 deg
tp 2459002.901896281544
(2020-Jun-02.40189628)
0.00024783 TDB
period 2011.476144861336
5.51
2.0241e-05
5.542e-08
d
yr
n .1789730397348645 1.801e-09 deg/d
Q 3.25955593977907 2.1867e-08 au
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      8959 days (24.53 yr)  
   first obs. used      1995-11-15  
   last obs. used      2020-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59874  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:56  

Additional Information
 Earth MOID = 1.97554 au 
 Jupiter MOID = 1.69844 au 
 T_jup = 3.213 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457240.5 (2015-Aug-06.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04567127554330223 4.2371e-08  
q 2.976543309978967 1.3235e-07 au
tp 2456980.280718239249
(2014-Nov-18.78071824)
0.00024714 TDB
node 150.5265778134551 6.7988e-05 deg
peri 50.42510967633786 8.1598e-05 deg
i 3.427115890710984 4.5524e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      650  
   data-arc span      8959 days (24.53 yr)  
   first obs. used      1995-11-15  
   last obs. used      2020-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59874  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:56  

Additional Information
 Jupiter MOID = 1.69844 au 
 T_jup = 3.213 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.795275417346432E-15 -5.544205618398102E-15 -1.529465631569205E-12 7.932090512224958E-15 -2.609150930749243E-13 -5.307703131902466E-16
q -5.544205618398102E-15 1.751613523919806E-14 3.846187160323454E-12 -2.066217094953012E-14 6.505038159517585E-13 2.030699230219701E-15
tp -1.529465631569205E-12 3.846187160323454E-12 6.107783503347527E-8 -1.761779648022702E-11 1.117534361448681E-8 3.234557105575204E-13
node 7.932090512224958E-15 -2.066217094953012E-14 -1.761779648022702E-11 4.622325080960546E-9 -4.616423284440524E-9 8.239683325656159E-11
peri -2.609150930749243E-13 6.505038159517585E-13 1.117534361448681E-8 -4.616423284440524E-9 6.658202606655733E-9 -8.218192402805172E-11
i -5.307703131902466E-16 2.030699230219701E-15 3.234557105575204E-13 8.239683325656159E-11 -8.218192402805172E-11 2.07246790764613E-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 15.1   n/a MPO436469  
diameter diameter 4.898 km 0.494 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100844 (1998 HH23)          Discovered 1998-Apr-20 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 HH23 = 2001 XK78 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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