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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09995535169621507 4.4718e-08  
a 3.216874743628407 2.0456e-08 au
q 2.895330897266358 1.4059e-07 au
i 15.01456110727684 3.9355e-06 deg
node 264.2963075086861 1.9083e-05 deg
peri 278.5070027132431 2.8929e-05 deg
M 125.2184914885344 2.3476e-05 deg
tp 2458267.480344596001
(2018-May-28.98034460)
0.00013562 TDB
period 2107.412993148877
5.77
2.0101e-05
5.503e-08
d
yr
n .1708255577669621 1.6294e-09 deg/d
Q 3.538418589990456 2.25e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2509  
   data-arc span      16077 days (44.02 yr)  
   first obs. used      1976-10-24  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36454  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:12:13  

Additional Information
 Earth MOID = 1.94539 au 
 Jupiter MOID = 1.7251 au 
 T_jup = 3.129 
[ 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-August); 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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