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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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1082435972290483 4.5833e-08  
a 3.066936829669172 1.7119e-08 au
q 2.734960554751528 1.4001e-07 au
i 10.32174286426662 4.0204e-06 deg
node 141.1576631991882 2.6049e-05 deg
peri 230.6739515891357 3.0129e-05 deg
M 183.0883808252163 1.6221e-05 deg
tp 2459964.572133381011
(2023-Jan-20.07213338)
9.1415e-05 TDB
period 1961.804259302339
5.37
1.6426e-05
4.497e-08
d
yr
n .1835045460284727 1.5365e-09 deg/d
Q 3.398913104586816 1.8972e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1375  
   data-arc span      9098 days (24.91 yr)  
   first obs. used      1995-07-24  
   last obs. used      2020-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50156  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:02:19  

Additional Information
 Earth MOID = 1.74724 au 
 Jupiter MOID = 2.08512 au 
 T_jup = 3.198 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456669.5 (2014-Jan-12.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1067083094874818 4.5931e-08  
q 2.742542624227151 1.4063e-07 au
tp 2456044.587265217844
(2012-Apr-27.08726522)
8.471e-05 TDB
node 141.168515123299 2.6058e-05 deg
peri 231.7457282702467 3.0227e-05 deg
i 10.31638973828591 4.017e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1375  
   data-arc span      9098 days (24.91 yr)  
   first obs. used      1995-07-24  
   last obs. used      2020-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50156  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:02:19  

Additional Information
 Jupiter MOID = 2.08512 au 
 T_jup = 3.198 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.10969816462038E-15 -6.421485002922404E-15 2.969635807998448E-13 -4.687800997600888E-16 4.073975668555371E-14 -8.67722713463902E-16
q -6.421485002922404E-15 1.977697555896039E-14 -8.800168328828555E-13 2.088502763013273E-15 -1.07692924846156E-13 3.025829681599659E-15
tp 2.969635807998448E-13 -8.800168328828555E-13 7.175711763839118E-9 -6.776956977400447E-12 1.336034368032002E-9 -1.108284213788917E-12
node -4.687800997600888E-16 2.088502763013273E-15 -6.776956977400447E-12 6.789942999569286E-10 -6.686195921178193E-10 4.051563260636544E-11
peri 4.073975668555371E-14 -1.07692924846156E-13 1.336034368032002E-9 -6.686195921178193E-10 9.136548347761034E-10 -3.999173889518517E-11
i -8.67722713463902E-16 3.025829681599659E-15 -1.108284213788917E-12 4.051563260636544E-11 -3.999173889518517E-11 1.613605337946191E-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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