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JPL Small-Body Database Browser
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33529 Henden (1999 HA1)
Classification: Main-belt Asteroid          SPK-ID: 2033529
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1640822847810153 4.2526e-08  
a 2.416625662389438 8.2961e-09 au
q 2.020100202244144 1.0141e-07 au
i 4.96571104827819 5.3313e-06 deg
node 186.5861215733744 3.8648e-05 deg
peri 48.46100509687384 4.0906e-05 deg
M 190.8068528991318 1.3444e-05 deg
tp 2459645.400582544381
(2022-Mar-06.90058254)
5.1946e-05 TDB
period 1372.184474927742
3.76
7.066e-06
1.935e-08
d
yr
n .2623553950491658 1.351e-09 deg/d
Q 2.813151122534731 9.6574e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1425  
   data-arc span      8094 days (22.16 yr)  
   first obs. used      1997-11-29  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51859  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 03:08:39  

Additional Information
 Earth MOID = 1.01314 au 
 Jupiter MOID = 2.187 au 
 T_jup = 3.493 
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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 14.6   n/a MPO449205  
diameter diameter 4.120 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.125   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

33529 Henden           Discovered 1999 Apr. 19 by C. W. Juels at Fountain Hills.
Arne A. Henden (b. 1950) coauthored Astronomical Photometry in 1982. He is currently director of the American Association of Variable Star Observers, and he served on the staff of the U.S. Naval Observatory in Flagstaff, Arizona, from 1993 to 2005.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

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Alternate Designations
 1999 HA1 = 2000 QH80 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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