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JPL Small-Body Database Browser
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49972 (1999 XL255)
Classification: Main-belt Asteroid          SPK-ID: 2049972
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1241955533505186 3.9466e-08  
a 2.611046819765655 1.3364e-08 au
q 2.286766415160748 1.0225e-07 au
i 1.735517378076076 4.7384e-06 deg
node 55.88321533976912 0.00015717 deg
peri 229.0112920021531 0.00015857 deg
M 35.43471169819472 2.1743e-05 deg
tp 2458448.813539025759
(2018-Nov-26.31353903)		 9.2713e-05 TDB
period 1541.063080061934
4.22		 1.1831e-05
3.239e-08		 d
yr
n .2336049735131749 1.7935e-09 deg/d
Q 2.935327224370563 1.5024e-08 au
   Orbit Determination Parameters
   # obs. used (total)      847  
   data-arc span      7726 days (21.15 yr)  
   first obs. used      1998-09-18  
   last obs. used      2019-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54562  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:48:18  

Additional Information
 Earth MOID = 1.27019 au 
 Jupiter MOID = 2.19691 au 
 T_jup = 3.398 
[ 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 15.5   n/a MPO502489  
diameter diameter 2.092 km 0.322 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.336   0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49972 (1999 XL255)          Discovered 1999-Dec-12 by Spacewatch at Kitt Peak
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 XL255 = 2001 FA174 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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