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8474 Rettig (1985 GA1)
Classification: Main-belt Asteroid          SPK-ID: 2008474
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1716301748573769 2.999e-08  
a 2.224699969882759 5.698e-09 au
q 1.84287432504658 6.6943e-08 au
i 5.911417459648955 2.9038e-06 deg
node 132.6258874642637 4.0513e-05 deg
peri 141.8288655575984 4.1909e-05 deg
M 162.1579333928746 1.2234e-05 deg
tp 2458454.564544329368
(2018-Dec-02.06454433)
4.0374e-05 TDB
period 1212.008317627361
3.32
4.6563e-06
1.275e-08
d
yr
n .2970276645499755 1.1411e-09 deg/d
Q 2.606525614718938 6.6759e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2434  
   data-arc span      23942 days (65.55 yr)  
   first obs. used      1955-04-14  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46418  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:20:35  

Additional Information
 Earth MOID = .830783 au 
 Jupiter MOID = 2.5158 au 
 T_jup = 3.620 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456788.5 (2014-May-11.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .171383607225896 2.9974e-08  
q 1.843984665985749 6.6852e-08 au
tp 2457242.826045735725
(2015-Aug-08.32604574)
3.9073e-05 TDB
node 132.6587385979549 4.052e-05 deg
peri 141.7351588579885 4.1924e-05 deg
i 5.910156837232105 2.9033e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2434  
   data-arc span      23942 days (65.55 yr)  
   first obs. used      1955-04-14  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46418  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:20:35  

Additional Information
 Jupiter MOID = 2.5158 au 
 T_jup = 3.620 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.984515275452372E-16 -1.998790012891454E-15 -4.189025152490425E-13 -1.113418064790206E-14 -1.16211432298219E-13 -6.758877907494676E-16
q -1.998790012891454E-15 4.469204066647689E-15 9.787530862153782E-13 2.487650104944354E-14 2.693264961657398E-13 1.531875554254336E-15
tp -4.189025152490425E-13 9.787530862153782E-13 1.526693109497885E-9 1.44826133149017E-11 4.410559978907524E-10 7.181710243650903E-13
node -1.113418064790206E-14 2.487650104944354E-14 1.44826133149017E-11 1.641898703623942E-9 -1.628540225948114E-9 2.01471585956659E-12
peri -1.16211432298219E-13 2.693264961657398E-13 4.410559978907524E-10 -1.628540225948114E-9 1.757645449611576E-9 -1.808064821799819E-12
i -6.758877907494676E-16 1.531875554254336E-15 7.181710243650903E-13 2.01471585956659E-12 -1.808064821799819E-12 8.429329567924984E-12

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 13.7   n/a MPO337327  
diameter diameter 4.197 km 0.593 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 30.54 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Chiorny, V.; Benishek, V.; Pravec, P.; Kusnirak, P.; et al. (2015) CBET 4122.]
[Oey, J.; Williams, H.; Groom, R.; Pray, D.; Benishek, V. (2017) Minor Planet Bull. 44, 193-199.]
geometric albedo albedo 0.354   0.121 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

8474 Rettig           Discovered 1985 Apr. 15 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory.
Terrence W. Rettig (b. 1946) is a planetary astronomer and educator at the University of Notre Dame who has contributed to the understanding of comets and the evolution of planet-forming regions around young stars. He has also served as the National Science Foundation Special Progams Director for Physics.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1985 GA1 = 1992 NQ 
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