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295955 (2008 XL55)
Classification: Main-belt Asteroid          SPK-ID: 2295955
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2159638426306727 5.1737e-08  
a 2.352297333014997 1.6804e-08 au
q 1.844286161967195 1.2392e-07 au
i 1.093143251910407 5.852e-06 deg
node 259.6566061575087 0.00030954 deg
peri 96.51579426261132 0.00030983 deg
M 151.6538759563888 1.6604e-05 deg
tp 2458445.378861953353
(2018-Nov-22.87886195)
5.7258e-05 TDB
period 1317.761306372822
3.61
1.412e-05
3.866e-08
d
yr
n .2731905985241825 2.9273e-09 deg/d
Q 2.860308504062798 2.0433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      172  
   data-arc span      9610 days (26.31 yr)  
   first obs. used      1993-10-10  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5942  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 16:43:50  

Additional Information
 Earth MOID = .840306 au 
 Jupiter MOID = 2.58843 au 
 T_jup = 3.525 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457169.5 (2015-May-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2167730936810554 5.1981e-08  
q 1.842050522189989 1.2463e-07 au
tp 2457125.592163005550
(2015-Apr-13.09216301)
5.0056e-05 TDB
node 259.9660593900084 0.00031045 deg
peri 95.81882894192991 0.00031072 deg
i 1.090828232646726 5.8496e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      172  
   data-arc span      9610 days (26.31 yr)  
   first obs. used      1993-10-10  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5942  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 16:43:50  

Additional Information
 Jupiter MOID = 2.58843 au 
 T_jup = 3.525 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.70202691436966E-15 -6.442740966480714E-15 -3.391412553963474E-13 -1.972721046340556E-14 -4.869752176709344E-14 -9.616696080971436E-16
q -6.442740966480714E-15 1.553307903812649E-14 1.04020674581014E-12 4.695594318453963E-14 1.751411302459631E-13 2.430616644453638E-15
tp -3.391412553963474E-13 1.04020674581014E-12 2.50557145513814E-9 8.003036415804752E-12 6.825577723361937E-10 5.789235707358659E-13
node -1.972721046340556E-14 4.695594318453963E-14 8.003036415804752E-12 9.637682500973637E-8 -9.635739006030028E-8 1.490742445063332E-10
peri -4.869752176709344E-14 1.751411302459631E-13 6.825577723361937E-10 -9.635739006030028E-8 9.654628498874526E-8 -1.48925908017272E-10
i -9.616696080971436E-16 2.430616644453638E-15 5.789235707358659E-13 1.490742445063332E-10 -1.48925908017272E-10 3.421743874586403E-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 17.2   n/a MPO455188  

295955 (2008 XL55)          Discovered 2008-Dec-07 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20110912/Numbers.arcLast Updated: 2011-09-14

Alternate Designations
 2008 XL55 = 1993 TZ44 = 2004 VN28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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