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

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09646895592906338 5.936e-08  
a 3.217506855135168 3.2245e-08 au
q 2.907117328125674 1.9195e-07 au
i 15.01061810397912 5.8258e-06 deg
node 264.3403738943069 2.4812e-05 deg
peri 278.8378734101382 4.0599e-05 deg
M 246.0305341487698 3.5235e-05 deg
tp 2458267.865359486667
(2018-May-29.36535949)
0.00021026 JED
period 2108.034179337229
5.77
3.1689e-05
8.676e-08
d
yr
n .170775219647143 2.5672e-09 deg/d
Q 3.527896382144662 3.5355e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1267  
   data-arc span      14358 days (39.31 yr)  
   first obs. used      1976-10-24  
   last obs. used      2016-02-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .45782  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 17:52:00  

Additional Information
 Earth MOID = 1.95611 au 
 Jupiter MOID = 1.72559 au 
 T_jup = 3.129 
[ 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 10.9 mag n/a MPO347535  
diameter diameter 34.20 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
rotation period rot_per 12.141 h n/a LCDB (Rev. 2016-February); 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 Bul. 39, 213-216.]
geometric albedo albedo 0.0869   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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