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118377 (1999 HW7)
Classification: Main-belt Asteroid          SPK-ID: 2118377
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1584697418690629 4.3844e-08  
a 2.584497360890965 1.3331e-08 au
q 2.174932731249299 1.0977e-07 au
i 10.93381158102973 5.4749e-06 deg
node 212.4425285883657 3.0233e-05 deg
peri 294.7284653288413 3.6297e-05 deg
M 131.895166446223 2.0473e-05 deg
tp 2458644.481878783871
(2019-Jun-09.98187878)
8.5397e-05 TDB
period 1517.618340619173
4.16
1.1742e-05
3.215e-08
d
yr
n .2372137910860537 1.8354e-09 deg/d
Q 2.99406199053263 1.5444e-08 au
  Orbit Determination Parameters
   # obs. used (total)      429  
   data-arc span      7797 days (21.35 yr)  
   first obs. used      1999-04-15  
   last obs. used      2020-08-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62046  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:11:58  

Additional Information
 Earth MOID = 1.21078 au 
 Jupiter MOID = 2.0993 au 
 T_jup = 3.380 
[ 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 15.97   n/a E2021B55  

118377 (1999 HW7)          Discovered 1999-Apr-19 by Spacewatch at Kitt Peak
Reference: 20051116/Numbers.arcLast Updated: 2005-11-21

[ show close-approach data ]
Alternate Designations
 1999 HW7 = 2001 UB115 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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