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3893 DeLaeter (1980 FG12)
Classification: Main-belt Asteroid          SPK-ID: 2003893
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2646738155316438 5.9145e-08  
a 2.421633014865884 1.5571e-08 AU
q 1.780690165003933 1.441e-07 AU
i 23.07840297215582 9.9793e-06 deg
node 196.7600607123452 1.5341e-05 deg
peri 107.7334294708176 2.4772e-05 deg
M 301.6263195210331 1.9528e-05 deg
tp 2457023.690392515881
(2015-Jan-01.19039252)
7.5828e-05 JED
period 1376.451521412429
3.77
1.3276e-05
3.635e-08
d
yr
n .2615420844103469 2.5226e-09 deg/d
Q 3.062575864727836 1.9692e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      740  
   data-arc span      13432 days (36.77 yr)  
   first obs. used      1977-09-21  
   last obs. used      2014-07-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51625  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:07:31  

Additional Information
 Earth MOID = .896242 AU 
 T_jup = 3.359 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1 mag n/a MPO259365  
rotation period rot_per 13.83 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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. (2004) Minor Planet Bul. 31, 4-6.]

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 | Physical Parameters | Discovery Circumstances ]
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