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4252 Godwin (1985 RG4)
Classification: Main-belt Asteroid          SPK-ID: 2004252
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1392336024297061 1.8584e-08  
a 2.652827401278467 9.7524e-09 au
q 2.283464685574231 4.8272e-08 au
i 13.50247613224098 6.7344e-07 deg
node 163.9640387473765 1.9592e-06 deg
peri 58.91338477930609 8.2251e-06 deg
M 203.3767005379384 7.9295e-06 deg
tp 2460083.118952470493
(2023-May-18.61895247)
3.6788e-05 TDB
period 1578.199563783625
4.32
8.7027e-06
2.383e-08
d
yr
n .2281080341556582 1.2579e-09 deg/d
Q 3.022190116982704 1.111e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2710  
   data-arc span      13471 days (36.88 yr)  
   first obs. used      1984-04-19  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43918  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 09:38:53  

Additional Information
 Earth MOID = 1.31007 au 
 Jupiter MOID = 2.01894 au 
 T_jup = 3.336 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.76   n/a MPCxxxxx  
diameter diameter 7.376 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.623 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Casalnuovo, G.B. (2015) Minor Planet Bull. 42, 139-141.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.325   0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4252 Godwin           Discovered 1985 Sept. 11 by H. Debehogne at the European Southern Observatory.
Richard Godwin (b. 1955), a board member of the Space Frontier Foundation, served as executive director of The Watch, a support organization for NEO detection. His brother Robert Godwin (b. 1958) is a space expert and space-history researcher. Together they founded a space book company and write extensively on space.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071124/MPCPages.arcLast Updated: 2007-11-26

Alternate Designations
 1985 RG4 = 1984 HE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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