Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1082435963043401 4.5867e-08  
a 3.066936834418072 1.7862e-08 au
q 2.734960561822411 1.4034e-07 au
i 10.32174257100391 4.0726e-06 deg
node 141.157667769149 2.6965e-05 deg
peri 230.6739412722109 3.153e-05 deg
M 183.0883846462082 1.6735e-05 deg
tp 2459964.572114797863
(2023-Jan-20.07211480)
9.3581e-05 TDB
period 1961.804263858879
5.37
1.7139e-05
4.692e-08
d
yr
n .1835045456022602 1.6031e-09 deg/d
Q 3.398913107013732 1.9796e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1269  
   data-arc span      8933 days (24.46 yr)  
   first obs. used      1995-07-24  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50426  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 03:59:20  

Additional Information
 Earth MOID = 1.74724 au 
 Jupiter MOID = 2.08512 au 
 T_jup = 3.198 
[ 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 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Feb-18 03:59 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin