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JPL Small-Body Database Browser
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181874 (1999 HW11)
Classification: TransNeptunian Object          SPK-ID: 2181874
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2590919377673119 0.00031064  
a 53.13670312032681 0.032868 au
q 39.36941174231496 0.0081573 au
i 17.18038798358021 0.00042088 deg
node 198.3792788239309 0.00040011 deg
peri 325.7644069246354 0.058256 deg
M 42.85897480165851 0.070861 deg
tp 2441757.105835988837
(1973-Mar-15.60583599)
12.296 TDB
period 141478.46342814
387.35
131.27
0.3594
d
yr
n .002544556897756044 2.3609e-06 deg/d
Q 66.90399449833865 0.041384 au
  Orbit Determination Parameters
   # obs. used (total)      29  
   data-arc span      6932 days (18.98 yr)  
   first obs. used      1999-04-18  
   last obs. used      2018-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .23558  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:51:24  

Additional Information
 Earth MOID = 38.3915 au 
 Jupiter MOID = 34.0412 au 
 T_jup = 5.995 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.0   n/a MPO446096  

181874 (1999 HW11)          Discovered 1999-Apr-18 by Kitt Peak at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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