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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1078742183453619 4.5868e-08  
a 3.068190029124295 1.7926e-08 au
q 2.737211427997478 1.4043e-07 au
i 10.31992586227141 4.0718e-06 deg
node 141.1538630054216 2.7006e-05 deg
peri 230.8161308933105 3.1612e-05 deg
M 109.56501215931 1.6661e-05 deg
tp 2458003.064261120486
(2017-Sep-06.56426112)
8.9951e-05 TDB
period 1963.006819037254
5.37
1.7203e-05
4.71e-08
d
yr
n .1833921291096482 1.6072e-09 deg/d
Q 3.399168630251111 1.986e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1265  
   data-arc span      8646 days (23.67 yr)  
   first obs. used      1995-07-24  
   last obs. used      2019-03-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50811  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 01:24:55  

Additional Information
 Earth MOID = 1.74873 au 
 Jupiter MOID = 2.08155 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-January); 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 2019-Oct-17 04:22 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin