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JPL Small-Body Database Browser
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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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2970134254851748 4.659e-08  
a 2.459664074269865 1.216e-08 au
q 1.729110822028151 1.1071e-07 au
i 6.672263204778274 5.0647e-06 deg
node 76.68841169117141 3.8565e-05 deg
peri 96.46133996228913 3.9695e-05 deg
M 55.92592435642736 1.208e-05 deg
tp 2458781.611576227007
(2019-Oct-25.11157623)
4.601e-05 TDB
period 1409.003668067601
3.86
1.0448e-05
2.861e-08
d
yr
n .2554996897160156 1.8946e-09 deg/d
Q 3.190217326511579 1.5771e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1268  
   data-arc span      10266 days (28.11 yr)  
   first obs. used      1991-11-29  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51144  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 07:47:30  

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 1.930514381483 1.93051329492968 1.93051546809755 1.14766213978827 0.663037495409334 2442674.676978973 1.10248947255808 1784.28460790809 622.843019046062 21.8802176778661 743995.597968837 T 23 CATAB v2.0f-lin.ifort 2020-Jan-29 07:47:59 2020-Jan-29 07:48
1987-Feb-06 03:58 < 00:01 Jupiter 1.82559644060624 1.82559588179342 1.82559699941932 0.622458299204745 n/a 2446832.665596539 0.728201005064311 613.893296425026 27.8210597337002 89.8526251503816 9813887.08040603 F 23 CATAB v2.0f-lin.ifort 2020-Jan-29 07:47:59 2020-Jan-29 07:48
1998-Jul-02 20:06 < 00:01 Jupiter 1.84127694098913 1.84127662264574 1.84127725933287 0.420871986392245 n/a 2450997.337232542 0.426056100121181 67.0756882325282 12.5099791193886 -81.4718933912975 21777842.0402225 F 23 CATAB v2.0f-lin.ifort 2020-Jan-29 07:47:59 2020-Jan-29 07:48
2009-Nov-18 23:43 < 00:01 Jupiter 1.96940537223175 1.96940503130776 1.9694057131558 0.804835190647818 n/a 2455154.488262680 0.205768357173303 46.4324807172248 15.5503413219942 -80.9650896769604 18732973.1705167 F 23 CATAB v2.0f-lin.ifort 2020-Jan-29 07:47:59 2020-Jan-29 07:48
2118-Apr-07 21:31 00:02 Jupiter 1.96940296219373 1.96940200428864 1.96940392011001 1.40609061293829 1.05683905349245 2494740.396631673 1.64141714127813 443.291557651186 330.78594640205 60.7019620381383 741760.506303915 T 23 CATAB v2.0f-lin.ifort 2020-Jan-29 07:47:59 2020-Jan-29 07:48
2129-Aug-23 18:29 00:02 Jupiter 1.83350764869297 1.83350715383893 1.83350814354738 0.827171354972264 n/a 2498896.270060809 1.76513049909483 983.865182079813 24.6550983706356 -89.9403126426399 11122121.1651824 F 23 CATAB v2.0f-lin.ifort 2020-Jan-29 07:47:59 2020-Jan-29 07:48
2141-Jan-17 09:20 00:02 Jupiter 1.81865739725162 1.81865676639755 1.81865802814488 0.507209512096472 n/a 2503060.888852726 2.00027463640475 614.468901917433 22.889658303934 87.985880043384 11875569.2937922 F 23 CATAB v2.0f-lin.ifort 2020-Jan-29 07:47:59 2020-Jan-29 07:48
2152-Jun-08 02:09 00:02 Jupiter 1.92417182597642 1.92417032750785 1.92417332444693 0.62639187096979 n/a 2507220.589825347 2.37210367334455 128.807341648666 30.041620022944 56.8914920038001 8115988.64466013 F 23 CATAB v2.0f-lin.ifort 2020-Jan-29 07:47:59 2020-Jan-29 07:48
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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