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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1783420672054645 3.7746e-08  
a 2.591869656930202 1.1911e-08 au
q 2.129630264386152 9.9447e-08 au
i 3.848155937617566 4.5831e-06 deg
node 203.453363252478 6.35e-05 deg
peri 99.03565744195645 6.498e-05 deg
M 130.9537488674284 1.5891e-05 deg
tp 2458446.086753942152
(2018-Nov-23.58675394)
6.5199e-05 TDB
period 1524.116493853717
4.17
1.0506e-05
2.876e-08
d
yr
n .2362024172376369 1.6282e-09 deg/d
Q 3.054109049474253 1.4035e-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 = 1.11852 au 
 Jupiter MOID = 2.18919 au 
 T_jup = 3.393 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456808.5 (2014-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1795943194291958 3.7584e-08  
q 2.125752694841421 9.9071e-08 au
tp 2456923.751809972970
(2014-Sep-23.25180997)
6.0052e-05 TDB
node 203.4798461000944 6.3508e-05 deg
peri 99.25614329203938 6.4975e-05 deg
i 3.847679786977818 4.5843e-06 deg
  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
 Jupiter MOID = 2.18919 au 
 T_jup = 3.393 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.412529810041927E-15 -3.705686681930678E-15 -1.734334478774792E-13 2.172608174855543E-15 -7.252079015781859E-14 -3.119910474589065E-16
q -3.705686681930678E-15 9.815135775613693E-15 6.707215397087973E-13 -6.308090735919138E-15 2.356776661974588E-13 1.083569330947922E-15
tp -1.734334478774792E-13 6.707215397087973E-13 3.606274907256774E-9 -9.910700313921261E-12 8.414874167790299E-10 6.847418553946791E-13
node 2.172608174855543E-15 -6.308090735919138E-15 -9.910700313921261E-12 4.033231240713421E-9 -4.026063524346339E-9 3.390943985058678E-11
peri -7.252079015781859E-14 2.356776661974588E-13 8.414874167790299E-10 -4.026063524346339E-9 4.221692719712561E-9 -3.368949846358766E-11
i -3.119910474589065E-16 1.083569330947922E-15 6.847418553946791E-13 3.390943985058678E-11 -3.368949846358766E-11 2.101547738854157E-11

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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