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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 ]

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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 .1262017069879309 3.1393e-08  
a 2.539512696368179 1.0214e-08 au
q 2.219021859168992 8.2843e-08 au
i 13.5051820561499 3.5458e-06 deg
node 204.4556414118811 1.6977e-05 deg
peri 28.62215334246743 2.5021e-05 deg
M 268.0930010249438 2.069e-05 deg
tp 2459577.872365487741
(2021-Dec-29.37236549)
8.5653e-05 TDB
period 1478.168725892767
4.05
8.9175e-06
2.441e-08
d
yr
n .2435445925041956 1.4693e-09 deg/d
Q 2.860003533567366 1.1503e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1891  
   data-arc span      11675 days (31.96 yr)  
   first obs. used      1989-04-03  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5046  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 01:09:28  

Additional Information
 Earth MOID = 1.21741 au 
 Jupiter MOID = 2.13151 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 14.05   n/a MPCxxxxx  
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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