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1746 Brouwer (1963 RF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001746
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2068953370370075 4.8755e-08  
a 3.9486465051162 3.932e-08 au
q 3.131689955600182 1.8754e-07 au
i 8.36701129318835 6.0824e-06 deg
node 321.9894848360158 3.2401e-05 deg
peri 47.55115805282268 3.4762e-05 deg
M 216.5946242670565 1.4907e-05 deg
tp 2458542.152000445919
(2019-Feb-27.65200045)
0.00013155 JED
period 2865.964529292858
7.85
4.2809e-05
1.172e-07
d
yr
n .1256121617418711 1.8763e-09 deg/d
Q 4.765603054632218 4.7455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1445  
   data-arc span      27282 days (74.69 yr)  
   first obs. used      1940-11-29  
   last obs. used      2015-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54725  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-28 15:55:07  

Additional Information
 Earth MOID = 2.13717 au 
 Jupiter MOID = .857162 au 
 T_jup = 3.004 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.95 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
diameter diameter 64.25 km 4.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 19.8 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Dahlgren, M.; Lahulla, J.F.; Lagerkvist, C.-I.; Lagerros, J.; et al. (1998) Icarus 133, 247-285.]
[Slyusarev, I.G.; Shevchenko, V.G.; Belskaya, I.N.; Krugly, Yu.N.; Chiorny, V.G. (2012) ACM 2012, #6398.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2015) Astron. Astrophys., in press.arXiv:1510.07422]
geometric albedo albedo 0.0448   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
B-V BV .721 mag .023 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=11.87, mean=12.43, max.=12.99) deg.
U-B UB .227 mag .035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=11.87, mean=12.43, max.=12.99) deg.
Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1746 Brouwer (1963 RF)          Discovered 1963-Sep-14 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

[ show close-approach data ]
Alternate Designations
 1963 RF = 1940 WE = 1947 QA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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