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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2568477773810602 0.00030862  
a 52.96667790298556 0.032623 au
q 39.3623044083452 0.0082115 au
i 17.20179094741463 0.00042158 deg
node 198.4295690334034 0.00039973 deg
peri 325.3964978043058 0.059075 deg
M 44.3251503790975 0.072648 deg
tp 2441664.446215025273
(1972-Dec-12.94621503)
12.473 TDB
period 140799.959147662
385.49
130.08
0.3561
d
yr
n .002556818923664992 2.3622e-06 deg/d
Q 66.57105139762592 0.041003 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 = 38.3843 au 
 Jupiter MOID = 34.0331 au 
 T_jup = 5.989 
[ 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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