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12257 Lassine (1989 GL4)
Classification: Main-belt Asteroid          SPK-ID: 2012257
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1263381753018297 3.6558e-08  
a 2.539350147167885 1.1579e-08 au
q 2.218533283122262 9.3227e-08 au
i 13.50563807239677 4.2794e-06 deg
node 204.4649414610874 1.7497e-05 deg
peri 28.61357407448208 2.6017e-05 deg
M 219.3950031939705 2.2164e-05 deg
tp 2459577.772095444827
(2021-Dec-29.27209544)
9.2671e-05 TDB
period 1478.026806165582
4.05
1.0109e-05
2.768e-08
d
yr
n .243567977588946 1.6659e-09 deg/d
Q 2.860167011213509 1.3042e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1656  
   data-arc span      11530 days (31.57 yr)  
   first obs. used      1989-04-03  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5223  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:54:10  

Additional Information
 Earth MOID = 1.21809 au 
 Jupiter MOID = 2.13251 au 
 T_jup = 3.397 
[ 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 14.0   n/a MPO358749  
diameter diameter 4.071 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.244   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

12257 Lassine           Discovered 1989 Apr. 3 by E. W. Elst at the European Southern Observatory.
George Lassine (1953-2003) was a member of the Belgian astronomical club Astronomie Centre Ardenne-Neufchâteau. His observations of sunspots have been sent regularly to the Sunspot Index Data Center. A brilliant observer, he was esteemed for his great heart and sense of humor.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031110/MPCPages.arcLast Updated: 2003-11-12

Alternate Designations
 1989 GL4 = 1993 FK32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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