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27943 (1997 LB12)
Classification: Main-belt Asteroid          SPK-ID: 2027943
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07624033586032283 3.7706e-08  
a 2.323277988301227 8.7867e-09 au
q 2.146150494176246 8.7119e-08 au
i 2.820810328035919 5.2749e-06 deg
node 149.7758848597281 0.00010832 deg
peri 155.0493011898026 0.00011617 deg
M 121.7128650141288 4.2194e-05 deg
tp 2458563.195266594358
(2019-Mar-20.69526659)
0.00015159 TDB
period 1293.451633134725
3.54
7.3378e-06
2.009e-08
d
yr
n .2783250573719 1.579e-09 deg/d
Q 2.500405482426208 9.4566e-09 au
  Orbit Determination Parameters
   # obs. used (total)      740  
   data-arc span      9595 days (26.27 yr)  
   first obs. used      1994-08-10  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59072  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:54:01  

Additional Information
 Earth MOID = 1.13143 au 
 Jupiter MOID = 2.64189 au 
 T_jup = 3.571 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457038.5 (2015-Jan-16.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07675011107770863 3.7896e-08  
q 2.144541709215505 8.7679e-08 au
tp 2457271.422550019252
(2015-Sep-05.92255002)
0.00015076 TDB
node 149.8188190682414 0.00010833 deg
peri 155.4649348262776 0.00011607 deg
i 2.820932791345189 5.2772e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      740  
   data-arc span      9595 days (26.27 yr)  
   first obs. used      1994-08-10  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59072  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:54:01  

Additional Information
 Jupiter MOID = 2.64189 au 
 T_jup = 3.571 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.436078876923709E-15 -3.308462742283634E-15 2.513482813947084E-12 7.579712098075939E-15 6.873594726299111E-13 -5.393583352359927E-16
q -3.308462742283634E-15 7.687674580518299E-15 -5.925385158201259E-12 -1.755944139949455E-14 -1.627387883905266E-12 1.377560964617197E-15
tp 2.513482813947084E-12 -5.925385158201259E-12 2.272963033959153E-8 6.817189682419226E-11 6.318406227485951E-9 -4.384576252906302E-13
node 7.579712098075939E-15 -1.755944139949455E-14 6.817189682419226E-11 1.173552408433379E-8 -1.170122592836802E-8 3.077241768945532E-10
peri 6.873594726299111E-13 -1.627387883905266E-12 6.318406227485951E-9 -1.170122592836802E-8 1.347264007831895E-8 -3.074886462452985E-10
i -5.393583352359927E-16 1.377560964617197E-15 -4.384576252906302E-13 3.077241768945532E-10 -3.074886462452985E-10 2.784930452735612E-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 16.1   n/a MPO502367  

27943 (1997 LB12)          Discovered 1997-Jun-07 by Elst, E. W. at La Silla
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 LB12 = 1994 PL38 = 2000 ET188 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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