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20789 Hughgrant (2000 SU44)
Classification: Main-belt Asteroid          SPK-ID: 2020789
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2426513251266619 2.7477e-08  
a 2.550836580748373 8.5304e-09 au
q 1.931872704248217 7.3435e-08 au
i 9.76477943828505 1.3736e-06 deg
node 66.39682479317824 2.9983e-06 deg
peri 15.18279694502072 3.687e-06 deg
M 347.5377730695118 3.467e-06 deg
tp 2459252.012844983018
(2021-Feb-06.51284498)
1.437e-05 TDB
period 1488.066643090739
4.07
7.4645e-06
2.044e-08
d
yr
n .2419246487860746 1.2135e-09 deg/d
Q 3.169800457248529 1.06e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2118  
   data-arc span      25245 days (69.12 yr)  
   first obs. used      1952-01-31  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41836  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:31:39  

Additional Information
 Earth MOID = .948863 au 
 Jupiter MOID = 2.11184 au 
 T_jup = 3.379 
[ 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 13.41   n/a E2021B10  
diameter diameter 5.254 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 94.7953 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.443   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20789 Hughgrant           Discovered 2000 Sept. 28 by C. W. Juels at Fountain Hills.
Hugh M. Grant (b. 1933) is a retired educator and businessman from Vancouver and a member of the Royal Astronomical Society of Canada. He recently completed construction of a roll-off roof observatory at his winter home in Fountain Hills, Arizona.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010804/MPCPages.arcLast Updated: 2009-05-11

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Alternate Designations
 2000 SU44 = 1952 BA2 = 1989 FD1 = 1994 LE7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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