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1615 Bardwell (1950 BW)
Classification: Main-belt Asteroid          SPK-ID: 2001615
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1827088321209296 1.3323e-08  
a 3.118744692273358 9.729e-09 au
q 2.548922491864745 4.0289e-08 au
i 1.690847601103662 9.4415e-07 deg
node 152.4351309719028 1.7871e-05 deg
peri 254.0420606476239 1.9331e-05 deg
M 58.36596307410178 5.2062e-06 deg
tp 2459070.344040806424
2.8718e-05 TDB
period 2011.722913928709
n .178951085911207 8.3737e-10 deg/d
Q 3.688566892681971 1.1507e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3665  
   data-arc span      34558 days (94.61 yr)  
   first obs. used      1926-10-01  
   last obs. used      2021-05-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43251  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 12:34:44  

Additional Information
 Earth MOID = 1.5587 au 
 Jupiter MOID = 1.71033 au 
 T_jup = 3.190 
[ 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 11.46   n/a E2021B10 IRAS observations used: 5
diameter diameter 29.139 km 0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 18. h n/a LCDB (Rev. 2020-October); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Tedesco, E.F. (1979) PhD Dissertation, New. Mex. State Univ. 280pp.]
geometric albedo albedo 0.060   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.692   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=2.68, mean=5.86, max.=10.14) deg.
U-B UB 0.329   0.057 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=6.65, mean=8.40, max.=10.14) deg.
Tholen spectral type spec_T B   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1615 Bardwell (1950 BW)          Discovered 1950-Jan-28 by Goethe Link Observatory at Brooklyn
Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1950 BW = 1926 TO = 1937 TJ = 1948 RB1 = 1948 RH1 = 1948 TG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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