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3700 Geowilliams (1984 UL2)
Classification: Main-belt Asteroid          SPK-ID: 2003700
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2249548456810742 1.6584e-08  
a 2.415853624330971 8.3182e-09 au
q 1.872395645081534 3.9245e-08 au
i 12.12023833052033 3.2929e-07 deg
node 289.1600441799108 4.0436e-06 deg
peri 153.0078746051415 7.0319e-06 deg
M 195.8906255054866 4.3838e-06 deg
tp 2459825.723425837740
(2022-Sep-03.22342584)
1.9072e-05 TDB
period 1371.526970929449
3.76
7.0836e-06
1.939e-08
d
yr
n .2624811670717909 1.3557e-09 deg/d
Q 2.959311603580408 1.0189e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1989  
   data-arc span      17071 days (46.74 yr)  
   first obs. used      1973-12-20  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39501  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:26:46  

Additional Information
 Earth MOID = .89621 au 
 Jupiter MOID = 2.28745 au 
 T_jup = 3.452 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456850.5 (2014-Jul-12.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2252539428895704 1.6461e-08  
q 1.871113795504062 3.8794e-08 au
tp 2457084.879704790033
(2015-Mar-03.37970479)
1.2244e-05 TDB
node 289.208220080908 4.0431e-06 deg
peri 153.1814302745668 7.0301e-06 deg
i 12.1237439035981 3.2935e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      1989  
   data-arc span      17071 days (46.74 yr)  
   first obs. used      1973-12-20  
   last obs. used      2020-09-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39501  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 15:26:46  

Additional Information
 Jupiter MOID = 2.28745 au 
 T_jup = 3.452 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.709538274442332E-16 -6.29908178235237E-16 -1.613333867419653E-13 3.321463422098413E-14 -9.228490630857153E-14 -2.415652420587867E-16
q -6.29908178235237E-16 1.505011754397323E-15 3.906788211442575E-13 -7.931522462637699E-14 2.224934526302672E-13 5.270571516022962E-16
tp -1.613333867419653E-13 3.906788211442575E-13 1.499208235913537E-10 -2.374472339745322E-11 7.511322220541202E-11 -2.296938016147942E-13
node 3.321463422098413E-14 -7.931522462637699E-14 -2.374472339745322E-11 1.634625540388529E-11 -2.371684681177628E-11 6.873541583760382E-13
peri -9.228490630857153E-14 2.224934526302672E-13 7.511322220541202E-11 -2.371684681177628E-11 4.942163368903852E-11 -7.77227897856469E-13
i -2.415652420587867E-16 5.270571516022962E-16 -2.296938016147942E-13 6.873541583760382E-13 -7.77227897856469E-13 1.084711783501447E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.65   n/a E2021B10  
diameter diameter 7.753 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.387 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Higgins, D.J. (2011) http://www.david-higgins.com/Astronomy/asteroid/lightcurves.htm]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.233   0.033 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Sk   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

3700 Geowilliams (1984 UL2)          Discovered 1984-Oct-23 by Shoemaker, C. and Shoemaker, E. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1984 UL2 = 1973 YF2 = 1977 UJ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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