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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2620785466940615 4.7983e-08  
a 3.181331787913368 2.0136e-08 au
q 2.347572976385412 1.5684e-07 au
i 12.36219989312702 5.3811e-06 deg
node 303.9730018398212 1.937e-05 deg
peri 200.718524280362 2.0542e-05 deg
M 200.6950034382346 7.7345e-06 deg
tp 2460313.646622615347
(2024-Jan-04.14662262)
4.7773e-05 TDB
period 2072.582726641038
5.67
1.9677e-05
5.387e-08
d
yr
n .1736963236123459 1.6491e-09 deg/d
Q 4.015090599441323 2.5413e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1536  
   data-arc span      13708 days (37.53 yr)  
   first obs. used      1984-01-26  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43253  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:36:16  

Additional Information
 Earth MOID = 1.36545 au 
 Jupiter MOID = 1.0885 au 
 T_jup = 3.110 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457169.5 (2015-May-27.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2524141907960152 4.557e-08  
q 2.386672363741534 1.4565e-07 au
tp 2456138.689804049925
(2012-Jul-30.18980405)
5.144e-05 TDB
node 304.2551510300664 1.9429e-05 deg
peri 199.1132870688702 2.0895e-05 deg
i 12.31585102650185 5.3533e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1536  
   data-arc span      13708 days (37.53 yr)  
   first obs. used      1984-01-26  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43253  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 22:36:16  

Additional Information
 Jupiter MOID = 1.0885 au 
 T_jup = 3.110 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.076654794228319E-15 -6.610972542238328E-15 -3.597148459571933E-13 -1.333694287356196E-14 -1.445765972466569E-14 3.307143782910879E-15
q -6.610972542238328E-15 2.121427962061627E-14 9.040549722874795E-13 1.487679642513392E-14 3.737557383880624E-14 -3.450061954192862E-15
tp -3.597148459571933E-13 9.040549722874795E-13 2.646051452060907E-9 3.683086881874779E-11 3.932305908358572E-10 -1.088102243269747E-11
node -1.333694287356196E-14 1.487679642513392E-14 3.683086881874779E-11 3.774845778562777E-10 -3.676114800975225E-10 4.871605695548883E-12
peri -1.445765972466569E-14 3.737557383880624E-14 3.932305908358572E-10 -3.676114800975225E-10 4.365897816277827E-10 -5.25924198592346E-12
i 3.307143782910879E-15 -3.450061954192862E-15 -1.088102243269747E-11 4.871605695548883E-12 -5.25924198592346E-12 2.865815468768742E-11

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 1.09889430730855 1.0988933791558 1.09889523546468 3.30263434915129 3.06035997006397 2416069.614141874 1.43173409067683 147.995198610357 32.3024524506685 -76.783001232262 2096318.57786933 T 30 CATAB v2.0g-lin.ifort 2021-Aug-24 22:36:28 2021-Aug-24 22:36
1913-Dec-15 18:34 00:02 Jupiter 1.32421259044608 1.32421023396406 1.32421494694106 3.2009334620208 2.99444322719107 2420117.273843363 1.73874825354196 264.466675736302 50.4931899870933 66.2869925788141 2062336.82441042 T 30 CATAB v2.0g-lin.ifort 2021-Aug-24 22:36:28 2021-Aug-24 22:36
1998-Dec-05 14:08 00:02 Jupiter 1.75359336841606 1.75359219491451 1.75359454191861 2.4853411558106 2.28273488595909 2451153.088811574 1.82017385846181 152.234968392635 58.6013004500877 -30.7916186075961 828782.072255374 T 30 CATAB v2.0g-lin.ifort 2021-Aug-24 22:36:28 2021-Aug-24 22:36
2009-Aug-25 16:29 < 00:01 Jupiter 1.09277492506171 1.09277436911657 1.09277548100697 3.23593881270787 2.98681717166109 2455069.186874404 0.355902326890069 51.7657538612704 27.5493450113397 77.8732976380522 2311024.07465414 T 30 CATAB v2.0g-lin.ifort 2021-Aug-24 22:36:28 2021-Aug-24 22:36
2020-Sep-11 16:32 < 00:01 Jupiter 1.38578475490894 1.3857840300659 1.38578547975465 3.12063908989485 2.91820900186247 2459104.189122958 0.394845906651257 156.460459544135 29.8684734048271 81.050724130305 2392836.95746444 T 30 CATAB v2.0g-lin.ifort 2021-Aug-24 22:36:28 2021-Aug-24 22:36
2105-Aug-08 04:54 00:04 Jupiter 1.68123524569169 1.68123241145975 1.68123807992909 2.75128926505362 2.56163489888302 2490114.704063311 3.75493510733558 242.456143706328 43.9792480467285 -15.5091013849918 617767.837594736 T 30 CATAB v2.0g-lin.ifort 2021-Aug-24 22:36:28 2021-Aug-24 22:36
2116-Jun-02 22:35 00:01 Jupiter 1.10399152903124 1.10399082528115 1.1039922327826 3.11571367186407 2.85888069708677 2494066.441183851 1.2029281276451 119.915001992956 29.9830160436856 -81.8877452111383 1880440.20374619 T 30 CATAB v2.0g-lin.ifort 2021-Aug-24 22:36:28 2021-Aug-24 22:36
2127-May-25 05:38 00:02 Jupiter 1.48291933975999 1.48291643258827 1.48292224698743 3.04121789614621 2.84721524222901 2498074.734811653 2.22777589642513 503.320733928205 31.3259461853831 73.4500094870465 2181036.50323615 T 30 CATAB v2.0g-lin.ifort 2021-Aug-24 22:36:28 2021-Aug-24 22:36

Alternate Designations
 1999 XA230 = 1984 BH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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