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JPL Small-Body Database Browser
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31201 Michellegrand (1998 AT5)
Classification: Main-belt Asteroid          SPK-ID: 2031201
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1082435962558082 4.5858e-08  
a 3.066936834525165 1.7696e-08 au
q 2.734960562066756 1.4026e-07 au
i 10.3217426979884 4.0682e-06 deg
node 141.1576652176949 2.6696e-05 deg
peri 230.6739436328574 3.1164e-05 deg
M 183.0883847470018 1.6619e-05 deg
tp 2459964.572114299088
(2023-Jan-20.07211430)
9.3089e-05 TDB
period 1961.804263961633
5.37
1.698e-05
4.649e-08
d
yr
n .1835045455926486 1.5882e-09 deg/d
Q 3.398913106983573 1.9612e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1277  
   data-arc span      8960 days (24.53 yr)  
   first obs. used      1995-07-24  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50334  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:17:38  

Additional Information
 Earth MOID = 1.74724 au 
 Jupiter MOID = 2.08512 au 
 T_jup = 3.198 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456500.5 (2013-Jul-27.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1062417815596125 4.6069e-08  
q 2.746160837992631 1.4151e-07 au
tp 2456046.016625220107
(2012-Apr-28.51662522)
8.9054e-05 TDB
node 141.1837888746078 2.673e-05 deg
peri 232.138941795064 3.1327e-05 deg
i 10.30889816810161 4.0614e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1277  
   data-arc span      8960 days (24.53 yr)  
   first obs. used      1995-07-24  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50334  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 02:17:38  

Additional Information
 Jupiter MOID = 2.08512 au 
 T_jup = 3.198 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.122387649264377E-15 -6.478299795196059E-15 3.234933169609391E-13 4.319406327765146E-15 4.130519382924171E-14 -1.070252197368008E-15
q -6.478299795196059E-15 2.00263953312273E-14 -1.090717580879606E-12 -1.68884950038721E-14 -1.318504084765746E-13 3.084324392849911E-15
tp 3.234933169609391E-13 -1.090717580879606E-12 7.930665144644097E-9 -1.073240306733677E-11 1.49317938196933E-9 -1.460400101328698E-12
node 4.319406327765146E-15 -1.68884950038721E-14 -1.073240306733677E-11 7.144878005283895E-10 -7.046749627155381E-10 3.695443917233016E-11
peri 4.130519382924171E-14 -1.318504084765746E-13 1.49317938196933E-9 -7.046749627155381E-10 9.813976163055778E-10 -3.659370966416567E-11
i -1.070252197368008E-15 3.084324392849911E-15 -1.460400101328698E-12 3.695443917233016E-11 -3.659370966416567E-11 1.649509127944124E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7   n/a MPO435979  
diameter diameter 7.301 km 0.585 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.08206 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.083   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

31201 Michellegrand           Discovered 1998 Jan. 8 by ODAS at Caussols.
Michel Legrand (b. 1932) is a prolific French musical composer, arranger, conductor and jazz pianist. He composed the music of many well-known movies such as The Umbrellas of Cherbourg and The Young Girls of Rochefort. He has won three Oscars and many other awards worldwide.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-05-29Last Updated: 2018-09-17

Alternate Designations
 1998 AT5 = 1999 KZ20 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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