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7747 Michalowski (1987 SO)
Classification: Mars-crossing Asteroid          SPK-ID: 2007747
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2752769167787774 4.0542e-08  
a 2.293338427690313 8.9708e-09 au
q 1.662035296185435 9.1964e-08 au
i 5.054415135223905 4.5978e-06 deg
node 289.3907426072288 6.8458e-05 deg
peri 28.52087127071013 6.9507e-05 deg
M 133.0032791579224 1.4721e-05 deg
tp 2457131.837184770773
5.0787e-05 JED
period 1268.529727618164
n .2837931127368601 1.6652e-09 deg/d
Q 2.924641559195192 1.144e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1323  
   data-arc span      10433 days (28.56 yr)  
   first obs. used      1987-08-24  
   last obs. used      2016-03-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5091  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Mar-24 15:57:32  

Additional Information
 Earth MOID = .650206 au 
 Jupiter MOID = 2.38466 au 
 T_jup = 3.540 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO302113  
rotation period rot_per 4.50 h n/a LCDB (Rev. 2016-February); 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:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

7747 Michałowski           Discovered 1987 Sept. 19 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Named in honor of Tadeusz Michałowski (b. 1954), Polish astronomer at the Astronomical Observatory of Adam Mickiewicz University in Posnan. Michałowski developed a formalism for computing the pole orientation, shape and sidereal rotation period of a minor planet, incorporating both the magnitude and timing information contained in lightcurve observations, in a simultaneous least-squares solution. This method, or methods similar to it, are now widely used standard analysis tools, and they have greatly improved the quality of such determinations. Name suggested by H. Rickman, citation prepared by A. W. Harris.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 1987 SO = 1989 AQ5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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