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102993 (1999 XL91)
Classification: Main-belt Asteroid          SPK-ID: 2102993
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1388948325978032 3.082e-08  
a 2.247982718336177 7.4341e-09 au
q 1.935749534990119 7.1055e-08 au
i 5.283499504598309 3.5579e-06 deg
node 86.55260090885669 3.9708e-05 deg
peri 12.88623103225036 4.2867e-05 deg
M 83.40753486391652 1.4421e-05 deg
tp 2458915.272980278847
(2020-Mar-06.77298028)
4.954e-05 TDB
period 1231.084544905268
3.37
6.1068e-06
1.672e-08
d
yr
n .2924250828180952 1.4506e-09 deg/d
Q 2.560215901682235 8.4667e-09 au
  Orbit Determination Parameters
   # obs. used (total)      956  
   data-arc span      7758 days (21.24 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49178  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:35  

Additional Information
 Earth MOID = .952808 au 
 Jupiter MOID = 2.58101 au 
 T_jup = 3.611 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457202.5 (2015-Jun-29.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1380224308313756 3.0788e-08  
q 1.938265604630923 7.0939e-08 au
tp 2457683.839203815647
(2016-Oct-22.33920382)
5.1555e-05 TDB
node 86.59001471126953 3.9735e-05 deg
peri 12.87764651196949 4.2949e-05 deg
i 5.28140942830335 3.5558e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      956  
   data-arc span      7758 days (21.24 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49178  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:44:35  

Additional Information
 Jupiter MOID = 2.58101 au 
 T_jup = 3.611 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.478788075608397E-16 -2.175644359089985E-15 8.453166322480754E-14 -4.709104969758767E-15 4.948999040470989E-14 -1.19854672746293E-15
q -2.175644359089985E-15 5.032397011258576E-15 -2.854180313319923E-13 9.852052608931488E-15 -1.454823273604094E-13 2.825734082584225E-15
tp 8.453166322480754E-14 -2.854180313319923E-13 2.657960323596338E-9 2.28600589811777E-11 8.507102527443763E-10 -5.884535421264487E-13
node -4.709104969758767E-15 9.852052608931488E-15 2.28600589811777E-11 1.57889509496544E-9 -1.564588174712575E-9 -1.414160592933573E-11
peri 4.948999040470989E-14 -1.454823273604094E-13 8.507102527443763E-10 -1.564588174712575E-9 1.844609315892154E-9 1.38650386737266E-11
i -1.19854672746293E-15 2.825734082584225E-15 -5.884535421264487E-13 -1.414160592933573E-11 1.38650386737266E-11 1.264404155274133E-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 15.99   n/a E2021B55  
diameter diameter 4.159 km 0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.055   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102993 (1999 XL91)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 XL91 = 2002 TO85 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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