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JPL Small-Body Database Browser
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3898 Curlewis (1981 SF9)
Classification: Main-belt Asteroid          SPK-ID: 2003898
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1576699094352226 3.3037e-08  
a 3.112114015637978 1.4847e-08 au
q 2.621427280640251 1.0735e-07 au
i .6582831568738133 4.1664e-06 deg
node 184.1910654991929 0.00029714 deg
peri 215.521247516226 0.00029746 deg
M 337.7819852418381 1.4301e-05 deg
tp 2459124.261175641388
7.9993e-05 TDB
period 2005.310722666277
n .1795233007687413 1.2847e-09 deg/d
Q 3.602800750635705 1.7188e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2309  
   data-arc span      23800 days (65.16 yr)  
   first obs. used      1954-10-22  
   last obs. used      2019-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48556  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:58:44  

Additional Information
 Earth MOID = 1.62941 au 
 Jupiter MOID = 1.81076 au 
 T_jup = 3.199 
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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 12.6   n/a MPO412198  
diameter diameter 16.363 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.075   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

3898 Curlewis           Discovered 1981 Sept. 26 by M. P. Candy at the Perth Observatory.
Named in honor of Harold Burnham Curlewis (1874-1960), government astronomer for Western Australia during 1912-1940 and second director of the Perth Observatory. Because of severe funding cuts, he was sometimes the observatory's only employee, but he managed to keep the observatory operational during the severe years of the depression. His 38 years of continuous service remain the longest of any employee of the Perth Observatory. Name suggested and citation provided by J. Biggs and P. Birch.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19960828/MPCPages.arcLast Updated: 2003-09-26

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Alternate Designations
 1981 SF9 = 1954 UW = 1976 SE6 = 1976 UJ2 = 1987 UE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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