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120809 (1998 HU7)
Classification: Main-belt Asteroid          SPK-ID: 2120809
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1953258323524971 4.1424e-08  
a 2.546103357662824 1.1669e-08 au
q 2.048783600071845 1.0547e-07 au
i 5.948529307990439 6.1179e-06 deg
node 23.83140366763564 4.8488e-05 deg
peri 205.3890036386822 5.2187e-05 deg
M 143.8074713740947 2.1143e-05 deg
tp 2458407.722896242931
(2018-Oct-16.22289624)
8.5108e-05 TDB
period 1483.926775942089
4.06
1.0201e-05
2.793e-08
d
yr
n .2425995715128528 1.6678e-09 deg/d
Q 3.043423115253803 1.3948e-08 au
  Orbit Determination Parameters
   # obs. used (total)      782  
   data-arc span      7847 days (21.48 yr)  
   first obs. used      1998-03-03  
   last obs. used      2019-08-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5873  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:18:50  

Additional Information
 Earth MOID = 1.04087 au 
 Jupiter MOID = 1.9546 au 
 T_jup = 3.408 
[ show covariance matrix ]

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 15.6   n/a MPO296897  
diameter diameter 1.831 km 0.373 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.365   0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120809 (1998 HU7)          Discovered 1998-Apr-21 by Visnjan at Visnjan
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 HU7 = 2002 CD112 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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