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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1241646544487481 1.9033e-08  
a 2.238681576085069 6.5265e-09 au
q 1.960716451769688 4.3917e-08 au
i 1.275665680279172 8.1111e-07 deg
node 209.6760033872667 1.9066e-05 deg
peri 152.6076722119655 1.8545e-05 deg
M 340.0233071737599 7.0429e-06 deg
tp 2459268.390343409121
(2021-Feb-22.89034341)
2.4067e-05 TDB
period 1223.451941713795
3.35
5.3501e-06
1.465e-08
d
yr
n .2942494001813564 1.2867e-09 deg/d
Q 2.51664670040045 7.3368e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2775  
   data-arc span      16322 days (44.69 yr)  
   first obs. used      1976-04-30  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4571  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:46:50  

Additional Information
 Earth MOID = .956366 au 
 Jupiter MOID = 2.92485 au 
 T_jup = 3.626 
[ 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 13.98   n/a E2021B10  
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. 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:
[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

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