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8871 Svanberg (1992 EA22)
Classification: Main-belt Asteroid          SPK-ID: 2008871
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 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02924879724760587 3.2923e-08  
a 3.055178165500903 1.8239e-08 au
q 2.965817878782855 1.0323e-07 au
i 12.41784779067432 4.301e-06 deg
node 142.3550429945701 1.7329e-05 deg
peri 117.4606614374702 8.0856e-05 deg
M 10.54805138874112 7.7343e-05 deg
tp 2458943.349112963562
(2020-Apr-03.84911296)
0.00041918 TDB
period 1950.532716884405
5.34
1.7467e-05
4.782e-08
d
yr
n .1845649636551751 1.6528e-09 deg/d
Q 3.144538452218952 1.8773e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1650  
   data-arc span      10382 days (28.42 yr)  
   first obs. used      1992-03-01  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51591  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:02:28  

Additional Information
 Earth MOID = 1.97054 au 
 Jupiter MOID = 1.93983 au 
 T_jup = 3.199 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456716.5 (2014-Feb-28.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02665670742217091 3.3084e-08  
q 2.970473757521154 1.0324e-07 au
tp 2456998.620588329654
(2014-Dec-07.12058833)
0.00046299 TDB
node 142.4182333616685 1.7346e-05 deg
peri 118.0573949731198 8.8163e-05 deg
i 12.41439690695834 4.3002e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1650  
   data-arc span      10382 days (28.42 yr)  
   first obs. used      1992-03-01  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51591  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:02:28  

Additional Information
 Jupiter MOID = 1.93983 au 
 T_jup = 3.199 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.094545806966085E-15 -3.363396951871363E-15 1.60829064731393E-12 -1.935521595419469E-15 3.044017046430623E-13 -5.150470809740774E-16
q -3.363396951871363E-15 1.065906918498358E-14 -7.048450150202261E-12 7.146067466028583E-15 -1.337215529705987E-12 3.697075337447287E-15
tp 1.60829064731393E-12 -7.048450150202261E-12 2.143624221434082E-7 -8.553762560458742E-11 4.003829685189849E-8 -6.091896252061387E-12
node -1.935521595419469E-15 7.146067466028583E-15 -8.553762560458742E-11 3.008679402996628E-10 -3.093767661790606E-10 4.363532308178514E-12
peri 3.044017046430623E-13 -1.337215529705987E-12 4.003829685189849E-8 -3.093767661790606E-10 7.772796215318229E-9 -5.372349942903266E-12
i -5.150470809740774E-16 3.697075337447287E-15 -6.091896252061387E-12 4.363532308178514E-12 -5.372349942903266E-12 1.84914081385418E-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 13.1   n/a MPO473887  
diameter diameter 8.629 km 0.173 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.888086 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.150   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8871 Svanberg           Discovered 1992 Mar. 1 at the European Southern Observatory in the course of the Uppsala-ESO Survey of Asteroids and Comets.
Gustaf Svanberg (1802-1882), professor of astronomy at Uppsala University from 1842 to 1878, built the present building of Uppsala Astronomical Observatory and founded the meteorological observatory. His autobiography gives a good insight into the academic life in Uppsala during the nineteenth century.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000320/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1992 EA22 = 1994 PC40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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