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91855 (1999 UD11)
Classification: Main-belt Asteroid          SPK-ID: 2091855
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1304289055248051 8.0473e-08  
a 3.094046647118525 3.7162e-08 au
q 2.690493529292163 2.49e-07 au
i 20.67497134687722 9.2257e-06 deg
node 324.6650572510035 1.665e-05 deg
peri 20.21197742382542 3.0063e-05 deg
M 342.1138611621517 2.9318e-05 deg
tp 2459099.264941125507
(2020-Sep-06.76494113)
0.00016282 TDB
period 1987.873354194539
5.44
3.5814e-05
9.805e-08
d
yr
n .1810980559905274 3.2627e-09 deg/d
Q 3.497599764944887 4.2009e-08 au
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      7228 days (19.79 yr)  
   first obs. used      1998-07-31  
   last obs. used      2018-05-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6013  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:32:36  

Additional Information
 Earth MOID = 1.68858 au 
 Jupiter MOID = 1.9034 au 
 T_jup = 3.112 
[ 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 14.3   n/a MPO432456  

91855 (1999 UD11)          Discovered 1999-Oct-31 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ 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
1908-Oct-08 03:28 00:05 Jupiter 1.92118836174379 1.92118702458162 1.92118969893741 5.71017716364174 5.6324376499403 2418222.644439128 4.68034126193565 668.965212536347 54.00867228507 86.6578537867481 2351812.248598 T 15 CATAB v2.0e-lin.ifort 2019-Jul-13 05:32:41 2019-Jul-13 05:32
1979-Apr-22 14:55 00:02 Jupiter 1.93580361773117 1.93580274360761 1.93580449187783 5.71462012616984 5.63753236420387 2443986.121623959 1.54035235255393 505.827014986907 30.1606864772293 -86.5391504603653 2333480.62364458 T 15 CATAB v2.0e-lin.ifort 2019-Jul-13 05:32:41 2019-Jul-13 05:32
2039-Jul-23 16:36 00:01 Jupiter 1.97856024247493 1.97855937728006 1.9785611076706 5.60976573013106 5.53292604879686 2465993.191360160 1.26348758043093 305.575613005357 41.1261809894455 -88.0671549529036 2311386.99492515 T 15 CATAB v2.0e-lin.ifort 2019-Jul-13 05:32:41 2019-Jul-13 05:32
2110-Feb-04 05:44 00:04 Jupiter 1.9046720028537 1.90467119738318 1.90467280835942 5.74623259551487 5.66831310189136 2491755.738581707 4.4052448885916 810.12470816413 33.323605450079 -88.5366723557345 2295298.42535785 T 15 CATAB v2.0e-lin.ifort 2019-Jul-13 05:32:41 2019-Jul-13 05:32

Alternate Designations
 1999 UD11 = 2001 CN15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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