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49401 (1998 XT44)
Classification: Main-belt Asteroid          SPK-ID: 2049401
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1375974147252375 3.6852e-08  
a 2.650606139075076 1.3153e-08 au
q 2.285889586883502 9.9023e-08 au
i 11.00578761469465 4.8007e-06 deg
node 333.270139112567 1.9364e-05 deg
peri 130.950443425128 2.5809e-05 deg
M 339.7412118650188 1.8527e-05 deg
tp 2459089.200728763357
(2020-Aug-27.70072876)
8.1353e-05 TDB
period 1576.217794571366
4.32
1.1733e-05
3.212e-08
d
yr
n .228394833023629 1.7001e-09 deg/d
Q 3.01532269126665 1.4963e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1118  
   data-arc span      13879 days (38.00 yr)  
   first obs. used      1982-01-26  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49685  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:25:48  

Additional Information
 Earth MOID = 1.31867 au 
 Jupiter MOID = 2.11886 au 
 T_jup = 3.351 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456876.5 (2014-Aug-07.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1358854941616866 3.6897e-08  
q 2.291229072655609 9.9009e-08 au
tp 2457513.164422829257
(2016-May-04.66442283)
7.9025e-05 TDB
node 333.3705874904163 1.9334e-05 deg
peri 130.9161966036871 2.5942e-05 deg
i 11.01273765346931 4.8033e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1118  
   data-arc span      13879 days (38.00 yr)  
   first obs. used      1982-01-26  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49685  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:25:48  

Additional Information
 Jupiter MOID = 2.11886 au 
 T_jup = 3.351 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.361361092035502E-15 -3.628760690527034E-15 1.148590393694926E-13 3.100320433258457E-15 7.646633973257762E-14 -6.715796406035786E-16
q -3.628760690527034E-15 9.802740957945068E-15 -1.057813027848668E-13 -8.840593075760765E-15 -1.724625345657209E-13 2.469580398419139E-15
tp 1.148590393694926E-13 -1.057813027848668E-13 6.24491324656628E-9 -3.757920335179949E-12 1.372107517084391E-9 6.510207989403757E-12
node 3.100320433258457E-15 -8.840593075760765E-15 -3.757920335179949E-12 3.737936165446647E-10 -3.67311074357069E-10 1.281342605398613E-11
peri 7.646633973257762E-14 -1.724625345657209E-13 1.372107517084391E-9 -3.67311074357069E-10 6.729873877840829E-10 -1.119388514719913E-11
i -6.715796406035786E-16 2.469580398419139E-15 6.510207989403757E-12 1.281342605398613E-11 -1.119388514719913E-11 2.307150898841898E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO449317  
diameter diameter 6.107 km 0.189 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.099   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49401 (1998 XT44)          Discovered 1998-Dec-14 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 XT44 = 1982 BC7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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