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
JPL Small-Body Database Browser
Search: [ help ]  
20741 Jeanmichelreess (1999 XA230)
Classification: Main-belt Asteroid          SPK-ID: 2020741
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2620785551724008 4.8369e-08  
a 3.181331794718449 2.0892e-08 au
q 2.347572954434617 1.5759e-07 au
i 12.36219887281119 5.5059e-06 deg
node 303.9730055532471 1.9879e-05 deg
peri 200.7185167126412 2.1114e-05 deg
M 200.695004792103 7.7851e-06 deg
tp 2460313.646617763647
(2024-Jan-04.14661776)
4.7861e-05 TDB
period 2072.582733291128
5.67
2.0416e-05
5.59e-08
d
yr
n .1736963230550238 1.711e-09 deg/d
Q 4.015090635002281 2.6367e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1496  
   data-arc span      13649 days (37.37 yr)  
   first obs. used      1984-01-26  
   last obs. used      2021-06-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43289  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:26:34  

Additional Information
 Earth MOID = 1.36545 au 
 Jupiter MOID = 1.0885 au 
 T_jup = 3.110 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.21   n/a E2021B10  
diameter diameter 14.210 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 49.7215 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.042   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20741 Jeanmichelreess           Discovered 1999 Dec. 7 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Jean-Michel Reess (b. 1967) is an engineer at Paris Observatory. He is developing the optics of new-generation instruments for space missions.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080718/MPCPages.arcLast Updated: 2008-07-18

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Nov-16 02:44 00:01 Jupiter 1.09889426307089 1.09889333210869 1.09889519403634 3.30263407916611 3.06035966856614 2416069.614149533 1.44548400764037 149.366465610513 32.7487840016877 -76.9844276888094 2030039.54122654 T 29 CATAB v2.0g-lin.ifort 2021-Jul-08 18:26:46 2021-Jul-08 18:26
1913-Dec-15 18:34 00:02 Jupiter 1.32421248808569 1.32421012339091 1.3242148527938 3.20093321796287 2.99444294979159 2420117.273866962 1.74641193564918 267.95401052828 51.6663194451702 66.6674807730313 2053765.21392578 T 29 CATAB v2.0g-lin.ifort 2021-Jul-08 18:26:46 2021-Jul-08 18:26
1998-Dec-05 14:08 00:02 Jupiter 1.7535934140697 1.75359221318406 1.75359461495623 2.48534045027938 2.28273412331657 2451153.088880104 1.83017802167556 153.737917085033 61.1579948914595 -31.494842626845 822583.965914132 T 29 CATAB v2.0g-lin.ifort 2021-Jul-08 18:26:46 2021-Jul-08 18:26
2009-Aug-25 16:29 < 00:01 Jupiter 1.09277487953792 1.09277431483275 1.09277544424322 3.23593859191353 2.98681692164001 2455069.186897071 0.367625119000868 54.2737760870718 27.5585015227102 78.1879754599625 2252100.71354343 T 29 CATAB v2.0g-lin.ifort 2021-Jul-08 18:26:46 2021-Jul-08 18:26
2020-Sep-11 16:32 < 00:01 Jupiter 1.38578461604512 1.3857838291988 1.38578540289459 3.12063883850013 2.91820871204077 2459104.189172619 0.419841892825957 164.612776640604 31.6485172434243 80.5056913001473 2349613.3855715 T 29 CATAB v2.0g-lin.ifort 2021-Jul-08 18:26:46 2021-Jul-08 18:26
2105-Aug-08 04:54 00:04 Jupiter 1.68123531675145 1.6812324231589 1.68123821034956 2.75128874251945 2.56163434597502 2490114.704134231 3.77248364164899 244.975690179671 45.9607048001612 -15.524228035165 611970.042614316 T 29 CATAB v2.0g-lin.ifort 2021-Jul-08 18:26:46 2021-Jul-08 18:26
2116-Jun-02 22:35 00:01 Jupiter 1.10399147263124 1.10399075779482 1.1039921874688 3.11571354621046 2.85888054643454 2494066.441209595 1.20698297306596 121.68160746826 30.5957832423243 -82.3712182391885 1816301.23670814 T 29 CATAB v2.0g-lin.ifort 2021-Jul-08 18:26:46 2021-Jul-08 18:26
2127-May-25 05:38 00:02 Jupiter 1.48291917766252 1.48291621858208 1.48292213680129 3.04121759127386 2.8472148946545 2498074.734888327 2.2514607408153 514.337078681378 32.1183404460215 73.5075770684602 2155507.66385411 T 29 CATAB v2.0g-lin.ifort 2021-Jul-08 18:26:46 2021-Jul-08 18:26

Alternate Designations
 1999 XA230 = 1984 BH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jul-30 20:09 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin