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11911 Angel (1992 LF)
Classification: Main-belt Asteroid          SPK-ID: 2011911
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1575603159675296 4.2971e-08  
a 3.194843563215541 2.1046e-08 au
q 2.691463001928472 1.4112e-07 au
i 20.15940109526992 4.4023e-06 deg
node 152.2810036321989 1.2146e-05 deg
peri 221.4271706953511 1.7681e-05 deg
M 222.8708558390332 1.5836e-05 deg
tp 2459795.011317712729
(2022-Aug-03.51131771)
9.6143e-05 TDB
period 2085.800769243026
5.71
2.061e-05
5.643e-08
d
yr
n .1725955831009931 1.7054e-09 deg/d
Q 3.698224124502609 2.4362e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2205  
   data-arc span      18238 days (49.93 yr)  
   first obs. used      1970-08-28  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42057  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:28:34  

Additional Information
 Earth MOID = 1.71908 au 
 Jupiter MOID = 1.8299 au 
 T_jup = 3.081 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457104.5 (2015-Mar-23.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1574731688087555 4.2929e-08  
q 2.692841929251416 1.4101e-07 au
tp 2457711.725517154356
(2016-Nov-19.22551715)
8.5904e-05 TDB
node 152.2940422967322 1.2149e-05 deg
peri 221.9721338772685 1.7699e-05 deg
i 20.15479533041943 4.4012e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2205  
   data-arc span      18238 days (49.93 yr)  
   first obs. used      1970-08-28  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42057  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:28:34  

Additional Information
 Jupiter MOID = 1.8299 au 
 T_jup = 3.081 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.842935190201186E-15 -6.006042784705638E-15 -4.058590963200505E-13 -1.274690517209468E-15 -4.869813647748474E-14 3.83923541694743E-15
q -6.006042784705638E-15 1.988295636274222E-14 1.921293091466915E-12 5.001575559068337E-15 2.323970493900831E-13 -1.05010120638117E-14
tp -4.058590963200505E-13 1.921293091466915E-12 7.379490111722887E-9 -2.480798285176636E-12 1.131146531656101E-9 6.250517240225278E-12
node -1.274690517209468E-15 5.001575559068337E-15 -2.480798285176636E-12 1.475875436701829E-10 -1.386957769093794E-10 1.195028287831325E-11
peri -4.869813647748474E-14 2.323970493900831E-13 1.131146531656101E-9 -1.386957769093794E-10 3.132497725693047E-10 -1.031020314120869E-11
i 3.83923541694743E-15 -1.05010120638117E-14 6.250517240225278E-12 1.195028287831325E-11 -1.031020314120869E-11 1.937062437174581E-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 11.9   n/a MPO473928  
diameter diameter 27.233 km 0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.054   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

11911 Angel           Discovered 1992 June 4 by C. S. Shoemaker and D. H. Levy at Palomar.
Founder and director of Steward Observatory's mirror lab at the University of Arizona, Tucson, Roger Angel (b. 1941) has spearheaded the development of telescope mirrors as large as eight meters in diameter by a process called spin-casting. His work and ideas have resulted in an enormous increase in telescope light-gathering power.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1992 LF = 1970 QC = 1993 PF9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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