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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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1716301759881964 3.0094e-08  
a 2.22469996992083 5.7064e-09 au
q 1.842874322562383 6.7161e-08 au
i 5.911417393842939 2.9108e-06 deg
node 132.6258856727581 4.0847e-05 deg
peri 141.8288669294118 4.2249e-05 deg
M 162.1579337155837 1.2275e-05 deg
tp 2458454.564543228893
(2018-Dec-02.06454323)
4.0523e-05 TDB
period 1212.008317658473
3.32
4.6632e-06
1.277e-08
d
yr
n .297027664542351 1.1428e-09 deg/d
Q 2.606525617279277 6.6857e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2351  
   data-arc span      23668 days (64.80 yr)  
   first obs. used      1955-04-14  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45906  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:55:41  

Additional Information
 Earth MOID = .830783 au 
 Jupiter MOID = 2.5158 au 
 T_jup = 3.620 
[ 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 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

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Alternate Designations
 1985 GA1 = 1992 NQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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