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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .178342032276792 3.7679e-08  
a 2.591869664386593 1.1891e-08 au
q 2.129630361043321 9.9241e-08 au
i 3.84814908429625 4.5785e-06 deg
node 203.4533689152084 6.3411e-05 deg
peri 99.03566866159163 6.4892e-05 deg
M 130.9537315621456 1.5887e-05 deg
tp 2458446.086824814347
(2018-Nov-23.58682481)
6.5184e-05 TDB
period 1524.116500430673
4.17
1.0489e-05
2.872e-08
d
yr
n .2362024162183625 1.6255e-09 deg/d
Q 3.054108967729865 1.4012e-08 au
  Orbit Determination Parameters
   # obs. used (total)      786  
   data-arc span      10658 days (29.18 yr)  
   first obs. used      1990-11-22  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52434  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:23:12  

Additional Information
 Earth MOID = 1.11852 au 
 Jupiter MOID = 2.18919 au 
 T_jup = 3.393 
[ 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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