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JPL Small-Body Database Browser
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49252 (1998 TZ18)
Classification: Main-belt Asteroid          SPK-ID: 2049252
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1783051175134228 3.7751e-08  
a 2.591054144553598 1.1904e-08 au
q 2.129055930825327 9.9437e-08 au
i 3.848810350273183 4.5839e-06 deg
node 203.458829749193 6.3488e-05 deg
peri 98.92563200466496 6.4969e-05 deg
M 36.56377457739805 1.554e-05 deg
tp 2458445.774575994826
(2018-Nov-23.27457599)
6.5195e-05 TDB
period 1523.397222678819
4.17
1.0499e-05
2.874e-08
d
yr
n .2363139400812072 1.6286e-09 deg/d
Q 3.053052358281868 1.4027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      778  
   data-arc span      10600 days (29.02 yr)  
   first obs. used      1990-11-22  
   last obs. used      2019-11-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52208  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 04:18:13  

Additional Information
 Earth MOID = 1.11718 au 
 Jupiter MOID = 2.18795 au 
 T_jup = 3.394 
[ 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 MPO449316  
diameter diameter 2.047 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.385   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49252 (1998 TZ18)          Discovered 1998-Oct-14 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 TZ18 = 1997 HD18 = 1998 UD39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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