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3893 DeLaeter (1980 FG12)
Classification: Main-belt Asteroid          SPK-ID: 2003893
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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2640365903566518 1.3234e-08  
a 2.422636739187063 7.8405e-09 au
q 1.782971994899354 3.2845e-08 au
i 23.07168510485847 7.2717e-07 deg
node 196.7248965513666 3.7284e-06 deg
peri 107.6446833642146 6.6286e-06 deg
M 209.2491456493194 5.6267e-06 deg
tp 2459777.250735053553
2.3521e-05 TDB
period 1377.3073825259
n .2613795617212052 1.2689e-09 deg/d
Q 3.062301483474772 9.9107e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2335  
   data-arc span      15889 days (43.50 yr)  
   first obs. used      1977-09-21  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43899  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:17:12  

Additional Information
 Earth MOID = .898035 au 
 Jupiter MOID = 2.63424 au 
 T_jup = 3.359 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.30   n/a MPCxxxxx  
diameter diameter 12.786 km 0.102 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 9.61 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:
[Stephens, R.D.; Warner, B.D. (2019) Minor Planet Bull. 45, 66-71.]
geometric albedo albedo 0.068   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

3893 DeLaeter           Discovered 1980 Mar. 20 by M. P. Candy at the Perth Observatory.
Named in honor of John DeLaeter, retired professor at Curtin University, Western Australia, in recognition of his pioneering application of mass spectrometry to a range of astrophysical, chemical, geological and nuclear problems over many decades. His outstanding scientific achievements and communication skills have been recognized in awards from ANZAAS, the Royal Society and the Australian Geological Society. He is an officer of the Order of Australia. His support of the Perth Observatory during funding crises was instrumental in maintaining the operation of this isolated institution. 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

Alternate Designations
 1980 FG12 = 1977 SX2 = 1984 KE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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