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180684 (2004 HW1)
Classification: Main-belt Asteroid          SPK-ID: 2180684
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1028139986904002 5.5146e-08  
a 2.755487469917699 2.4289e-08 au
q 2.472184784794166 1.6416e-07 au
i 13.76369970448297 5.6776e-06 deg
node 41.19940448882244 1.8097e-05 deg
peri 121.5909743435388 3.1226e-05 deg
M 275.1753080028108 2.6688e-05 deg
tp 2459594.155096278371
(2022-Jan-14.65509628)
0.00012599 TDB
period 1670.690825083212
4.57
2.209e-05
6.048e-08
d
yr
n .2154797252699759 2.8491e-09 deg/d
Q 3.038790155041232 2.6786e-08 au
  Orbit Determination Parameters
   # obs. used (total)      400  
   data-arc span      8022 days (21.96 yr)  
   first obs. used      1999-02-23  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55243  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:27:31  

Additional Information
 Earth MOID = 1.50594 au 
 Jupiter MOID = 1.99123 au 
 T_jup = 3.294 
[ 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 15.91   n/a MPCxxxxx  

180684 (2004 HW1)          Discovered 2004-Apr-20 by Yeung, W. K. Y. at Desert Eagle
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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