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7738 Heyman (1981 WS1)
Classification: Main-belt Asteroid          SPK-ID: 2007738
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .18235079637612 2.9817e-08  
a 2.250267585694922 7.4882e-09 au
q 1.839929499384084 6.8501e-08 au
i 5.95719367413732 3.931e-06 deg
node 66.30684600918036 3.6029e-05 deg
peri 220.5813481377558 3.8966e-05 deg
M 142.4533113471963 1.7846e-05 deg
tp 2458112.612466025378
(2017-Dec-25.11246603)		 5.9932e-05 TDB
period 1232.961947811687
3.38		 6.1544e-06
1.685e-08		 d
yr
n .2919798138449798 1.4574e-09 deg/d
Q 2.66060567200576 8.8537e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1871  
   data-arc span      13915 days (38.10 yr)  
   first obs. used      1981-10-30  
   last obs. used      2019-12-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49468  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:30:32  

Additional Information
 Earth MOID = .827802 au 
 Jupiter MOID = 2.49859 au 
 T_jup = 3.599 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.1   n/a MPO502226  
diameter diameter 3.859 km 0.232 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.327   0.071 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7738 Heyman           Discovered 1981 Nov. 24 at the Oak Ridge Observatory.
Named in honor of I. Michael Heyman (b. 1930), secretary and linchpin of the Smithsonian Institution's diverse and incomparably rich programs. Educator, legal scholar, civil rights champion, he has unfailingly supported research at the frontiers of astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980808/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 1981 WS1 = 1991 UW 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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