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8450 Egorov (1977 QL1)
Classification: Main-belt Asteroid          SPK-ID: 2008450
[ 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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08820434691001966 3.4479e-08  
a 2.750113407755475 1.1527e-08 au
q 2.507541450695915 9.5433e-08 au
i 4.87509331027444 4.0332e-06 deg
node 342.8404945015594 3.7406e-05 deg
peri 35.17288684453239 4.2881e-05 deg
M 110.6076966348758 2.0451e-05 deg
tp 2458488.691870823189
(2019-Jan-05.19187082)		 9.4745e-05 TDB
period 1665.805654663236
4.56		 1.0473e-05
2.867e-08		 d
yr
n .216111644832169 1.3587e-09 deg/d
Q 2.992685364815035 1.2544e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2323  
   data-arc span      22096 days (60.50 yr)  
   first obs. used      1959-10-28  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46727  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:57:57  

Additional Information
 Earth MOID = 1.51062 au 
 Jupiter MOID = 2.43756 au 
 T_jup = 3.335 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456890.5 (2014-Aug-21.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08645107398054504 3.4589e-08  
q 2.511775763144559 9.5522e-08 au
tp 2456814.865395059697
(2014-Jun-06.36539506)		 9.8046e-05 TDB
node 342.919547943921 3.7329e-05 deg
peri 33.53907776291337 4.3061e-05 deg
i 4.8824031899902 4.0361e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2323  
   data-arc span      22096 days (60.50 yr)  
   first obs. used      1959-10-28  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46727  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:57:57  

Additional Information
 Jupiter MOID = 2.43756 au 
 T_jup = 3.335 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.196378368490199E-15 -3.284213173549066E-15 -8.700749580471959E-13 2.08960422965916E-15 -2.2229899584908E-13 -9.560455927409784E-17
q -3.284213173549066E-15 9.124470372681734E-15 2.250722572650176E-12 -5.911455068583114E-15 5.809614852985694E-13 3.579019908084353E-16
tp -8.700749580471959E-13 2.250722572650176E-12 9.613070016136966E-9 -9.651778005091456E-12 2.112657858377474E-9 -1.347781165819163E-12
node 2.08960422965916E-15 -5.911455068583114E-15 -9.651778005091456E-12 1.393440974331378E-9 -1.390199186341577E-9 -1.449922673790932E-11
peri -2.2229899584908E-13 5.809614852985694E-13 2.112657858377474E-9 -1.390199186341577E-9 1.854263271602622E-9 1.415209871332197E-11
i -9.560455927409784E-17 3.579019908084353E-16 -1.347781165819163E-12 -1.449922673790932E-11 1.415209871332197E-11 1.629016594867004E-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 13.2   n/a MPO458914  
diameter diameter 11.191 km 2.605 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.058   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

8450 Egorov           Discovered 1977 Aug. 19 by N. S. Chernykh at the Crimean Astrophysical Observatory.
Vsevolod Aleksandrovich Egorov (1930-2001) was one of the founders of the modern theory of the space flight dynamics. One of the leading researchers at the Keldysh Institute of Applied Mathematics and a professor at Moscow University, he was a pioneer in studying trajectories from the earth to the moon.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020328/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1977 QL1 = 1959 UC = 1975 ED4 = 1986 RL9 = 1991 RN7 
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