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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1393942002235944 3.0861e-08  
a 2.654427713200947 1.096e-08 au
q 2.284415885067956 8.2129e-08 au
i 13.49629446602514 4.5244e-06 deg
node 164.0021942651706 1.6588e-05 deg
peri 59.29363287451109 2.4376e-05 deg
M 21.40916678437992 1.7514e-05 deg
tp 2458506.559677688839
(2019-Jan-23.05967769)
7.6829e-05 TDB
period 1579.627846922658
4.32
9.7834e-06
2.679e-08
d
yr
n .2279017812336822 1.4115e-09 deg/d
Q 3.024439541333937 1.2488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2144  
   data-arc span      12955 days (35.47 yr)  
   first obs. used      1984-04-19  
   last obs. used      2019-10-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4703  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:34:12  

Additional Information
 Earth MOID = 1.31079 au 
 Jupiter MOID = 2.02121 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 12.7   n/a MPO435739  
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. 2019-January); 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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