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180171 (2003 HD31)
Classification: Main-belt Asteroid          SPK-ID: 2180171
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0700423892618848 6.8587e-08  
a 3.150043188925451 3.2061e-08 au
q 2.929406637694986 2.0412e-07 au
i 10.84758927275643 8.5247e-06 deg
node 43.44997589003567 2.6412e-05 deg
peri 145.6327608488874 7.1521e-05 deg
M 79.68988768738275 6.2451e-05 deg
tp 2458748.463084073756
(2019-Sep-21.96308407)
0.00035419 TDB
period 2042.082056531912
5.59
3.1176e-05
8.536e-08
d
yr
n .1762906631731496 2.6914e-09 deg/d
Q 3.370679740155917 3.4306e-08 au
  Orbit Determination Parameters
   # obs. used (total)      266  
   data-arc span      6747 days (18.47 yr)  
   first obs. used      2002-01-23  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56766  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 09:08:27  

Additional Information
 Earth MOID = 1.93422 au 
 Jupiter MOID = 1.60371 au 
 T_jup = 3.176 
[ 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 15.44   n/a E2021B55  
diameter diameter 5.542 km 0.293 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.044   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

180171 (2003 HD31)          Discovered 2003-Apr-26 by Spacewatch at Kitt Peak
Reference: 20080321/Numbers.arcLast Updated: 2008-03-26

[ show close-approach data ]
Alternate Designations
 2003 HD31 = 2002 CP290 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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