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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .185733448217767 2.7594e-08  
a 2.6834503100646 1.0621e-08 au
q 2.185043830855266 7.416e-08 au
i 13.61122877858199 3.567e-06 deg
node 163.4022235736743 1.5185e-05 deg
peri 316.6590080190089 1.8512e-05 deg
M 59.03282670547578 1.1205e-05 deg
tp 2458737.212741688272
(2019-Sep-10.71274169)
4.9348e-05 TDB
period 1605.605190906945
4.40
9.5321e-06
2.61e-08
d
yr
n .224214521750923 1.3311e-09 deg/d
Q 3.181856789273935 1.2593e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2133  
   data-arc span      25017 days (68.49 yr)  
   first obs. used      1951-08-07  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44541  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:06:18  

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1938-Oct-07 10:37 00:01 Jupiter 1.9550128086691 1.95501248475234 1.95501313258731 3.86546441656625 3.75170649640403 2429178.942093888 1.23676136644161 153.741478363617 11.7953053002077 87.7172568653468 3745425.1793991 T 34 CATAB v2.0f-lin.ifort 2020-Feb-22 17:06:33 2020-Feb-22 17:06
1973-Sep-18 15:52 < 00:01 Jupiter 1.99268131202747 1.99268097017631 1.99268165387886 3.31042112526811 3.17942676910433 2441944.160946324 0.695822285157728 82.969310250322 15.6343499597049 -83.7138333932382 3437538.8522769 T 34 CATAB v2.0f-lin.ifort 2020-Feb-22 17:06:33 2020-Feb-22 17:06
2057-Oct-14 15:35 < 00:01 Jupiter 1.991188338962 1.99118801028012 1.99118866764422 4.15560510433003 4.05194803953228 2472651.149116815 0.703914000789904 88.0220495525629 12.2920473388945 84.4103345762639 4123824.11641394 T 34 CATAB v2.0f-lin.ifort 2020-Feb-22 17:06:33 2020-Feb-22 17:06
2092-Sep-29 17:45 00:01 Jupiter 1.94362160111891 1.94362127754386 1.94362192469517 3.70523257767322 3.5856877245828 2485420.239409452 1.27853295654294 145.015667201911 12.9450033857217 -85.6055678442702 3731213.00204226 T 34 CATAB v2.0f-lin.ifort 2020-Feb-22 17:06:33 2020-Feb-22 17:06

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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