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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1393679041094846 1.8571e-08  
a 2.652511753455995 9.7823e-09 au
q 2.282836749751059 4.8208e-08 au
i 13.50280276675441 6.7345e-07 deg
node 163.9664225911088 1.9594e-06 deg
peri 58.9467142562697 8.2173e-06 deg
M 158.6170337794536 7.8024e-06 deg
tp 2458505.264842968208
(2019-Jan-21.76484297)
3.2567e-05 TDB
period 1577.917898020016
4.32
8.7289e-06
2.39e-08
d
yr
n .2281487525122384 1.2621e-09 deg/d
Q 3.02218675716093 1.1146e-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      .4392  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:07:06  

Additional Information
 Earth MOID = 1.30795 au 
 Jupiter MOID = 2.02009 au 
 T_jup = 3.337 
[ 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 12.68   n/a E2020-QM5  
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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