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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1951071729546596 3.8217e-08  
a 2.54656185703003 1.1491e-08 au
q 2.049709372350732 9.723e-08 au
i 5.947832259840167 4.9592e-06 deg
node 23.82937693755748 3.6767e-05 deg
peri 205.388626949726 3.9711e-05 deg
M 192.329559582933 1.8134e-05 deg
tp 2459891.827409444702
(2022-Nov-08.32740944)
7.7892e-05 TDB
period 1484.327629730254
4.06
1.0047e-05
2.751e-08
d
yr
n .2425340556824524 1.6416e-09 deg/d
Q 3.043414341709327 1.3733e-08 au
  Orbit Determination Parameters
   # obs. used (total)      869  
   data-arc span      8370 days (22.92 yr)  
   first obs. used      1998-03-03  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57418  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:14  

Additional Information
 Earth MOID = 1.04057 au 
 Jupiter MOID = 1.95345 au 
 T_jup = 3.408 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457365.5 (2015-Dec-09.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1948432469889041 3.8255e-08  
q 2.05092285523645 9.7313e-08 au
tp 2456923.514042704665
(2014-Sep-23.01404270)
6.6052e-05 TDB
node 23.85619480640795 3.6737e-05 deg
peri 205.4981165919691 3.969e-05 deg
i 5.950240980193691 4.9608e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      869  
   data-arc span      8370 days (22.92 yr)  
   first obs. used      1998-03-03  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57418  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:14  

Additional Information
 Jupiter MOID = 1.95345 au 
 T_jup = 3.408 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.463431080054917E-15 -3.705869488584207E-15 -1.014748164525082E-12 -1.027301865035259E-14 -2.043357064132665E-13 6.56147339667972E-16
q -3.705869488584207E-15 9.469900322197284E-15 2.886392250538442E-12 2.576154506940428E-14 5.910419005775576E-13 -1.300370801745636E-15
tp -1.014748164525082E-12 2.886392250538442E-12 4.362879928123902E-9 1.069955300027379E-11 1.004764456285315E-9 2.903795843728613E-13
node -1.027301865035259E-14 2.576154506940428E-14 1.069955300027379E-11 1.349609013699077E-9 -1.339788537719577E-9 -5.47097124579157E-11
peri -2.043357064132665E-13 5.910419005775576E-13 1.004764456285315E-9 -1.339788537719577E-9 1.575289136635383E-9 5.453169907132082E-11
i 6.56147339667972E-16 -1.300370801745636E-15 2.903795843728613E-13 -5.47097124579157E-11 5.453169907132082E-11 2.460920243420053E-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 15.68   n/a E2021B55  
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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