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49858 (1999 XZ99)
Classification: Main-belt Asteroid          SPK-ID: 2049858
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .297013425572898 4.6218e-08  
a 2.459664075223269 1.199e-08 au
q 1.729110822482612 1.0965e-07 au
i 6.672262465620921 5.0123e-06 deg
node 76.68842075878426 3.7847e-05 deg
peri 96.46133134608067 3.8992e-05 deg
M 55.92592351602121 1.2007e-05 deg
tp 2458781.611579389005
(2019-Oct-25.11157939)
4.5744e-05 TDB
period 1409.003668886829
3.86
1.0302e-05
2.821e-08
d
yr
n .2554996895674622 1.8681e-09 deg/d
Q 3.190217327963927 1.5551e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1299  
   data-arc span      10464 days (28.65 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-07-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50788  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:30:29  

Additional Information
 Earth MOID = .749732 au 
 Jupiter MOID = 1.81355 au 
 T_jup = 3.420 
[ 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 14.8   n/a MPO319678  
diameter diameter 4.339 km 1.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.106   0.065 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

49858 (1999 XZ99)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ 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
1975-Sep-19 04:15 00:01 Jupiter 1.93051435934555 1.93051327741349 1.93051544133841 1.14766187721517 0.663037033329084 2442674.676962824 1.09368635139602 1772.99510176785 613.568862799017 22.1266963352649 756433.356066597 T 25 CATAB v2.0f-lin.ifort 2020-Nov-12 23:30:33 2020-Nov-12 23:30
1987-Feb-06 03:58 < 00:01 Jupiter 1.82559642858742 1.82559587222842 1.82559698494671 0.622458038636262 n/a 2446832.665582478 0.722730501342255 602.882274580873 27.6940927105899 89.842738273108 9858875.49270408 F 25 CATAB v2.0f-lin.ifort 2020-Nov-12 23:30:33 2020-Nov-12 23:30
1998-Jul-02 20:06 < 00:01 Jupiter 1.84127693364819 1.84127661873425 1.84127724856249 0.420871911396961 n/a 2450997.337227397 0.423369064345766 66.4904362671968 12.3368562704518 -81.44786645712 22082019.086565 F 25 CATAB v2.0f-lin.ifort 2020-Nov-12 23:30:33 2020-Nov-12 23:30
2009-Nov-18 23:43 < 00:01 Jupiter 1.96940536422254 1.96940502540882 1.96940570303631 0.804835134139681 n/a 2455154.488269356 0.205049973532592 45.9171946452491 15.5058419779591 -81.069053912809 18791940.6887658 F 25 CATAB v2.0f-lin.ifort 2020-Nov-12 23:30:33 2020-Nov-12 23:30
2118-Apr-07 21:31 00:02 Jupiter 1.96940298480558 1.9694020521918 1.96940391742966 1.40609044913483 1.05683884022972 2494740.396656943 1.61530560405953 428.794467217982 325.400392522925 60.9466331318413 756036.484766123 T 25 CATAB v2.0f-lin.ifort 2020-Nov-12 23:30:33 2020-Nov-12 23:30
2129-Aug-23 18:29 00:02 Jupiter 1.8335076543819 1.83350717455268 1.8335081342116 0.827171209932968 n/a 2498896.270093843 1.73895721369168 971.208426754628 23.8993314546017 -89.9319258035028 11473833.4019582 F 25 CATAB v2.0f-lin.ifort 2020-Nov-12 23:30:33 2020-Nov-12 23:30
2141-Jan-17 09:20 00:02 Jupiter 1.8186573793846 1.81865675113054 1.81865800767749 0.507209400321378 n/a 2503060.888895427 1.97249114169038 607.321110319011 22.646991164522 87.955805196877 12002595.380959 F 25 CATAB v2.0f-lin.ifort 2020-Nov-12 23:30:33 2020-Nov-12 23:30
2152-Jun-08 02:09 00:02 Jupiter 1.92417178102704 1.92417029926669 1.92417326278926 0.626391791833582 n/a 2507220.589863665 2.34005068286307 127.032367789805 29.8448746862868 56.8096690966027 8163817.41075282 F 25 CATAB v2.0f-lin.ifort 2020-Nov-12 23:30:33 2020-Nov-12 23:30
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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