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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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1082435970979472 4.5834e-08  
a 3.066936830409081 1.7143e-08 au
q 2.734960555813426 1.4001e-07 au
i 10.32174286160693 4.0244e-06 deg
node 141.1576632367108 2.6067e-05 deg
peri 230.6739505972521 3.0166e-05 deg
M 183.0883814603273 1.6238e-05 deg
tp 2459964.572130268880
(2023-Jan-20.07213027)
9.1486e-05 TDB
period 1961.804260012277
5.37
1.6449e-05
4.503e-08
d
yr
n .1835045459620661 1.5386e-09 deg/d
Q 3.398913105004737 1.8999e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1356  
   data-arc span      9039 days (24.75 yr)  
   first obs. used      1995-07-24  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5031  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 06:57:19  

Additional Information
 Earth MOID = 1.74724 au 
 Jupiter MOID = 2.08512 au 
 T_jup = 3.198 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456658.5 (2014-Jan-01.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1066812196387089 4.5938e-08  
q 2.74275355804538 1.4068e-07 au
tp 2456044.662919626608
(2012-Apr-27.16291963)
8.4898e-05 TDB
node 141.1686420067924 2.6076e-05 deg
peri 231.7677237043204 3.0265e-05 deg
i 10.31607966559715 4.0208e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1356  
   data-arc span      9039 days (24.75 yr)  
   first obs. used      1995-07-24  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5031  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 06:57:19  

Additional Information
 Jupiter MOID = 2.08512 au 
 T_jup = 3.198 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.110321365365813E-15 -6.424601017279686E-15 2.970800987996395E-13 -2.425747351556293E-16 4.051119707858368E-14 -8.891770844313416E-16
q -6.424601017279686E-15 1.979100727613442E-14 -8.860205949081182E-13 1.195592073934474E-15 -1.079773760486891E-13 3.068927339257931E-15
tp 2.970800987996395E-13 -8.860205949081182E-13 7.207633566099686E-9 -6.94311806345285E-12 1.342616581338192E-9 -1.110027575057907E-12
node -2.425747351556293E-16 1.195592073934474E-15 -6.94311806345285E-12 6.799789906242888E-10 -6.696393099354278E-10 4.034006303202248E-11
peri 4.051119707858368E-14 -1.079773760486891E-13 1.342616581338192E-9 -6.696393099354278E-10 9.159998705693415E-10 -3.982048908337854E-11
i -8.891770844313416E-16 3.068927339257931E-15 -1.110027575057907E-12 4.034006303202248E-11 -3.982048908337854E-11 1.616672663741574E-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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