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8661 Ratzinger (1990 TA13)
Classification: Main-belt Asteroid          SPK-ID: 2008661
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03717270045590789 1.925e-08  
a 3.003650767579785 1.4631e-08 au
q 2.891996957322384 6.0236e-08 au
i 10.56182655518588 1.2726e-06 deg
node 37.98725793894589 1.0118e-05 deg
peri 92.16268644072416 3.7397e-05 deg
M 250.6988208695676 3.9803e-05 deg
tp 2459973.791186822734
0.00021154 TDB
period 1901.396022527631
n .1893345708809426 1.3834e-09 deg/d
Q 3.115304577837187 1.5175e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2344  
   data-arc span      18925 days (51.81 yr)  
   first obs. used      1969-10-16  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44837  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 19:41:37  

Additional Information
 Earth MOID = 1.9315 au 
 Jupiter MOID = 1.91225 au 
 T_jup = 3.225 
[ show covariance matrix ]

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 12.37   n/a MPO636197  
diameter diameter 13.394 km 0.198 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 4.301035 h n/a LCDB (Rev. 2020-October); 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 0.090   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

8661 Ratzinger           Discovered 1990 Oct. 14 by L. D. Schmadel and F. Borngen at Tautenburg.
Joseph Cardinal Ratzinger (b. 1927), German professor of theology, is one of the most authoritative voices in the Vatican. Under his supervision, the Vatican opened its archives in 1998 to enable researchers to investigate judicial errors against Galileo and other medieval scientists. The name was proposed by the first discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

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Alternate Designations
 1990 TA13 = 1969 US = 1974 TM1 = 1992 CB1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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