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6642 Henze (1990 UE3)
Classification: Main-belt Asteroid          SPK-ID: 2006642
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2466812452417458 2.661e-08  
a 3.162584593272925 1.2633e-08 au
q 2.382434287621999 8.3336e-08 au
i 4.320533185380423 4.3301e-06 deg
node 30.64513543341717 4.5811e-05 deg
peri 58.72957231016439 4.6883e-05 deg
M 71.72817222214177 8.7997e-06 deg
tp 2458591.193240607443
(2019-Apr-17.69324061)
4.9686e-05 TDB
period 2054.289532500244
5.62
1.2309e-05
3.37e-08
d
yr
n .1752430678852993 1.05e-09 deg/d
Q 3.94273489892385 1.5749e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2340  
   data-arc span      24501 days (67.08 yr)  
   first obs. used      1953-05-18  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45134  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:33:05  

Additional Information
 Earth MOID = 1.40237 au 
 Jupiter MOID = 1.32492 au 
 T_jup = 3.152 
[ 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 12.4   n/a MPO337310  
diameter diameter 14.928 km 0.225 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.4696 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2007) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.126   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

6642 Henze           Discovered 1990 Oct. 26 by T. Urata at Oohira.
Martin Henze (b. 1981), an astronomer at the Max-Planck-Institut für extraterrestrische Physik, has discovered many optical novae in M31 on archival photographic plates at the Tautenburg Observatory. He also works on the discovery and analysis of optical and x-ray transients in nearby galaxies.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20081113/MPCPages.arcLast Updated: 2008-11-17

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Alternate Designations
 1990 UE3 = 1974 DH2 = 1975 EN5 = 1984 UP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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