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937 Bethgea (A920 RD)
Classification: Main-belt Asteroid          SPK-ID: 2000937
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2175972255626515 3.0679e-08  
a 2.231888789804351 4.6026e-09 au
q 1.746235981378541 6.8571e-08 au
i 3.696274417270788 3.6108e-06 deg
node 243.5673851066619 5.6488e-05 deg
peri 72.39651357993961 5.7243e-05 deg
M 350.0445870666868 1.1738e-05 deg
tp 2459034.179375570014
(2020-Jul-03.67937557)
3.9771e-05 TDB
period 1217.887724640065
3.33
3.7673e-06
1.031e-08
d
yr
n .2955937503240659 9.1437e-10 deg/d
Q 2.717541598230162 5.6042e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3080  
   data-arc span      38035 days (104.13 yr)  
   first obs. used      1916-04-28  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41984  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:23:10  

Additional Information
 Earth MOID = .737068 au 
 Jupiter MOID = 2.58406 au 
 T_jup = 3.607 
[ 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 11.8   n/a MPO473775  
diameter diameter 11.383 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.5390 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
geometric albedo albedo 0.254   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.936   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=12.21 deg.
U-B UB 0.526   0.036 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=12.21 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

937 Bethgea (A920 RD)          Discovered 1920-Sep-12 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A920 RD = 1946 GC = 1959 EQ = A916 GA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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