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4175 Billbaum (1985 GX)
Classification: Main-belt Asteroid          SPK-ID: 2004175
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1857334436636182 2.6434e-08  
a 2.683450312639863 9.6418e-09 au
q 2.185043845173048 6.9868e-08 au
i 13.61122877675246 3.5529e-06 deg
node 163.4022198234057 1.4015e-05 deg
peri 316.6590131867101 1.7373e-05 deg
M 59.03282411997607 1.0337e-05 deg
tp 2458737.212752840629
(2019-Sep-10.71275284)
4.5695e-05 TDB
period 1605.605193218254
4.40
8.6536e-06
2.369e-08
d
yr
n .2242145214281605 1.2084e-09 deg/d
Q 3.181856780106678 1.1433e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2321  
   data-arc span      25102 days (68.73 yr)  
   first obs. used      1951-08-07  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42872  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:04:26  

Additional Information
 Earth MOID = 1.21994 au 
 Jupiter MOID = 1.94555 au 
 T_jup = 3.311 
[ 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 12.4   n/a MPO384790  
diameter diameter 8.873 km 0.278 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 2.73 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Ditteon, R.; West, J. (2011) Minor Planet Bull. 38, 214-217.]
[Megna, R. (2011) http://www.macastronomy.com/MacAstronomy.com/Asteroids.html]
geometric albedo albedo 0.270   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

4175 Billbaum (1985 GX)          Discovered 1985-Apr-15 by Bowell, E. at Flagstaff
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1985 GX = 1974 UE = 1978 QF2 = 1978 RL4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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