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JPL Small-Body Database Browser
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2145 Blaauw (1976 UF)
Classification: Outer Main-belt Asteroid          SPK-ID: 2002145
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09803106448505851 4.7955e-08  
a 3.221361268221461 2.3133e-08 au
q 2.905567794006773 1.5423e-07 au
i 15.01924515705872 4.848e-06 deg
node 264.31662438886 2.006e-05 deg
peri 279.3554930913009 3.2203e-05 deg
M 56.28899438196975 2.5191e-05 deg
tp 2458270.298862471779
(2018-May-31.79886247)
0.00014782 TDB
period 2111.823293617701
5.78
2.2748e-05
6.228e-08
d
yr
n .1704688082037843 1.8362e-09 deg/d
Q 3.537154742436149 2.5401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1988  
   data-arc span      15640 days (42.82 yr)  
   first obs. used      1976-10-24  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39175  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:22:34  

Additional Information
 Earth MOID = 1.95512 au 
 Jupiter MOID = 1.72065 au 
 T_jup = 3.128 
[ 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 11.0   n/a MPO452191  
diameter diameter 40.549 km 0.848 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 12.141 h n/a LCDB (Rev. 2019-January); 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:
[Moravec, P.; Cochren, J.; Gerhardt, M.; Harris, A.; et al. (2012) Minor Planet Bull. 39, 213-216.]
geometric albedo albedo 0.051   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2145 Blaauw (1976 UF)          Discovered 1976-Oct-24 by West, R. M. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1976 UF = 1929 XS = 1963 RK = 1980 TW 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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