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136905 (1998 HF78)
Classification: Main-belt Asteroid          SPK-ID: 2136905
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1315539054852994 4.9925e-08  
a 3.177275450053521 3.3734e-08 au
q 2.759292455796417 1.5069e-07 au
i 21.08189024545866 7.3134e-06 deg
node 218.4031261525458 1.3322e-05 deg
peri 233.6344364370994 3.2365e-05 deg
M 71.6044589322649 2.6226e-05 deg
tp 2458589.048837071463
(2019-Apr-15.54883707)
0.00015202 TDB
period 2068.620039352456
5.66
3.2945e-05
9.02e-08
d
yr
n .1740290595428494 2.7716e-09 deg/d
Q 3.595258444310624 3.8172e-08 au
  Orbit Determination Parameters
   # obs. used (total)      547  
   data-arc span      8041 days (22.02 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53482  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 22:41:50  

Additional Information
 Earth MOID = 1.82347 au 
 Jupiter MOID = 1.93179 au 
 T_jup = 3.083 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457207.5 (2015-Jul-04.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1324671477174654 4.9693e-08  
q 2.755345471606132 1.5002e-07 au
tp 2456523.132814121843
(2013-Aug-18.63281412)
0.00016164 TDB
node 218.4290064587483 1.3322e-05 deg
peri 234.0738797162568 3.2239e-05 deg
i 21.08549309063975 7.3145e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      547  
   data-arc span      8041 days (22.02 yr)  
   first obs. used      1998-04-21  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53482  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 22:41:50  

Additional Information
 Jupiter MOID = 1.93179 au 
 T_jup = 3.083 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.469411831378937E-15 -7.331147168956001E-15 -3.569217711024654E-12 1.128430681222025E-14 -6.25571354231474E-13 7.086019531374653E-17
q -7.331147168956001E-15 2.250609377195492E-14 9.379396045262148E-12 -3.173662879429663E-14 1.688559339305394E-12 2.798665646137828E-15
tp -3.569217711024654E-12 9.379396045262148E-12 2.612744844498286E-8 -4.904148823653374E-11 4.752918196517935E-9 -9.943945752799867E-12
node 1.128430681222025E-14 -3.173662879429663E-14 -4.904148823653374E-11 1.774765166954086E-10 -1.739809268412792E-10 -1.154925892459023E-11
peri -6.25571354231474E-13 1.688559339305394E-12 4.752918196517935E-9 -1.739809268412792E-10 1.03936706305114E-9 9.230020363380745E-12
i 7.086019531374653E-17 2.798665646137828E-15 -9.943945752799867E-12 -1.154925892459023E-11 9.230020363380745E-12 5.350176958279737E-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 14.5   n/a MPO436675  
diameter diameter 6.583 km 0.288 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

136905 (1998 HF78)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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