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4789 Sprattia (1987 UU2)
Classification: Main-belt Asteroid          SPK-ID: 2004789
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1245035649138718 3.35e-08  
a 2.239039705728084 6.7977e-09 au
q 1.960271280381231 7.6336e-08 au
i 1.275639999976401 3.4239e-06 deg
node 209.716670041112 0.00013314 deg
peri 152.6079304741781 0.0001336 deg
M 281.1751214465636 1.1176e-05 deg
tp 2459268.448869545400
(2021-Feb-22.94886955)
3.8131e-05 TDB
period 1223.745533219583
3.35
5.5729e-06
1.526e-08
d
yr
n .2941788061549585 1.3397e-09 deg/d
Q 2.517808131074937 7.644e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2678  
   data-arc span      16235 days (44.45 yr)  
   first obs. used      1976-04-30  
   last obs. used      2020-10-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46082  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:48:42  

Additional Information
 Earth MOID = .957561 au 
 Jupiter MOID = 2.92396 au 
 T_jup = 3.625 
[ 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 14.0   n/a MPO473832  
diameter diameter 4.172 km 0.232 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.136 h n/a LCDB (Rev. 2019-August); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.279   0.070 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4789 Sprattia (1987 UU2)          Discovered 1987-Oct-20 by Tatum and Balam at Victoria
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1987 UU2 = 1976 HE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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